CVE catalog
CVE-2026-6019
http.cookies.Morsel.js_output() returns an inline <script> snippet and only escapes " for JavaScript string context. It does not neutralize the HTML parser-sensitive sequence </script> inside the gene
- Severity
- High · CVSS 8.7
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.21% · Oct 22, 2026
http.cookies.Morsel.js_output() returns an inline <script> snippet and only escapes " for JavaScript string context. It does not neutralize the HTML parser-sensitive sequence </script> inside the generated script element. Mitigation base64-encodes the cookie value to disallow escaping using cookie value.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | pypy3 | sid | 8.0.1+dfsg-1 | vulnerable |
| Debian | pypy3 | forky | 8.0.1+dfsg-1 | vulnerable |
| Debian | pypy3 | trixie | 7.3.19+dfsg-2 | vulnerable |
| Debian | pypy3 | bookworm | 7.3.11+dfsg-2+deb12u3 | vulnerable |
| Debian | python3.11 | bookworm | 3.11.2-6+deb12u8 | vulnerable |
| Debian | python3.11 | bookworm-security | 3.11.2-6+deb12u9 | fixed |
| Cpe | python3.12 | Not reported | 3.12.3-1ubuntu0.15 | fixed |
| Cpe | idle-python3.12 | Not reported | 3.12.3-1ubuntu0.15 | fixed |
| Cpe | libpython3.12-dev | Not reported | 3.12.3-1ubuntu0.15 | fixed |
| Cpe | libpython3.12-minimal | Not reported | 3.12.3-1ubuntu0.15 | fixed |
| Cpe | libpython3.12-stdlib | Not reported | 3.12.3-1ubuntu0.15 | fixed |
| Cpe | libpython3.12-testsuite | Not reported | 3.12.3-1ubuntu0.15 | fixed |
| Cpe | libpython3.12t64 | Not reported | 3.12.3-1ubuntu0.15 | fixed |
| Cpe | python3.12-dev | Not reported | 3.12.3-1ubuntu0.15 | fixed |
| Cpe | python3.12-doc | Not reported | 3.12.3-1ubuntu0.15 | fixed |
| Cpe | python3.12-examples | Not reported | 3.12.3-1ubuntu0.15 | fixed |
| Cpe | python3.12-full | Not reported | 3.12.3-1ubuntu0.15 | fixed |
| Cpe | python3.12-minimal | Not reported | 3.12.3-1ubuntu0.15 | fixed |
| Cpe | python3.12-nopie | Not reported | 3.12.3-1ubuntu0.15 | fixed |
| Cpe | python3.12-venv | Not reported | 3.12.3-1ubuntu0.15 | fixed |
| Cpe | pypy3 | Not reported | Not reported | vulnerable |
| Cpe | python3.11 | Not reported | Not reported | vulnerable |
| Cpe | python | Not reported | 3.15.0 | fixed |
| Ubuntu | python3.12 | noble | 3.12.3-1ubuntu0.17 | fixed |
| Ubuntu | idle-python3.12 | noble | 3.12.3-1ubuntu0.17 | fixed |
| Ubuntu | libpython3.12-dev | noble | 3.12.3-1ubuntu0.17 | fixed |
| Ubuntu | libpython3.12-minimal | noble | 3.12.3-1ubuntu0.17 | fixed |
| Ubuntu | libpython3.12-stdlib | noble | 3.12.3-1ubuntu0.17 | fixed |
| Ubuntu | libpython3.12-testsuite | noble | 3.12.3-1ubuntu0.17 | fixed |
| Ubuntu | libpython3.12t64 | noble | 3.12.3-1ubuntu0.17 | fixed |
| Ubuntu | python3.12-dev | noble | 3.12.3-1ubuntu0.17 | fixed |
| Ubuntu | python3.12-doc | noble | 3.12.3-1ubuntu0.17 | fixed |
| Ubuntu | python3.12-examples | noble | 3.12.3-1ubuntu0.17 | fixed |
| Ubuntu | python3.12-full | noble | 3.12.3-1ubuntu0.17 | fixed |
| Ubuntu | python3.12-minimal | noble | 3.12.3-1ubuntu0.17 | fixed |
| Ubuntu | python3.12-nopie | noble | 3.12.3-1ubuntu0.17 | fixed |
| Ubuntu | python3.12-venv | noble | 3.12.3-1ubuntu0.17 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | pypy3 | source | sid | (unfixed) | not yet assigned | Not reported | [1135116] |
| Debian | pypy3 | source | forky | (unfixed) | not yet assigned | Not reported | [1135116] |
| Debian | pypy3 | source | trixie | (unfixed) | not yet assigned | Not reported | [1135116] |
| Debian | pypy3 | source | bookworm | (unfixed) | not yet assigned | Not reported | [1135116] |
| Debian | python3.11 | source | bookworm | 3.11.2-6+deb12u9 | not yet assigned | Not reported | Not reported |
| Cpe | python3.12 | cpe | Not reported | 3.12.3-1ubuntu0.15 | Not reported | Not reported | Not reported |
| Cpe | idle-python3.12 | cpe | Not reported | 3.12.3-1ubuntu0.15 | Not reported | Not reported | Not reported |
| Cpe | libpython3.12-dev | cpe | Not reported | 3.12.3-1ubuntu0.15 | Not reported | Not reported | Not reported |
| Cpe | libpython3.12-minimal | cpe | Not reported | 3.12.3-1ubuntu0.15 | Not reported | Not reported | Not reported |
| Cpe | libpython3.12-stdlib | cpe | Not reported | 3.12.3-1ubuntu0.15 | Not reported | Not reported | Not reported |
| Cpe | libpython3.12-testsuite | cpe | Not reported | 3.12.3-1ubuntu0.15 | Not reported | Not reported | Not reported |
| Cpe | libpython3.12t64 | cpe | Not reported | 3.12.3-1ubuntu0.15 | Not reported | Not reported | Not reported |
| Cpe | python3.12-dev | cpe | Not reported | 3.12.3-1ubuntu0.15 | Not reported | Not reported | Not reported |
| Cpe | python3.12-doc | cpe | Not reported | 3.12.3-1ubuntu0.15 | Not reported | Not reported | Not reported |
| Cpe | python3.12-examples | cpe | Not reported | 3.12.3-1ubuntu0.15 | Not reported | Not reported | Not reported |
| Cpe | python3.12-full | cpe | Not reported | 3.12.3-1ubuntu0.15 | Not reported | Not reported | Not reported |
| Cpe | python3.12-minimal | cpe | Not reported | 3.12.3-1ubuntu0.15 | Not reported | Not reported | Not reported |
| Cpe | python3.12-nopie | cpe | Not reported | 3.12.3-1ubuntu0.15 | Not reported | Not reported | Not reported |
| Cpe | python3.12-venv | cpe | Not reported | 3.12.3-1ubuntu0.15 | Not reported | Not reported | Not reported |
| Cpe | python | cpe | Not reported | 3.15.0 | Not reported | Not reported | Not reported |
| Ubuntu | python3.12 | deb | noble | 3.12.3-1ubuntu0.17 | Not reported | Not reported | Not reported |
| Ubuntu | idle-python3.12 | deb | noble | 3.12.3-1ubuntu0.17 | Not reported | Not reported | Not reported |
| Ubuntu | libpython3.12-dev | deb | noble | 3.12.3-1ubuntu0.17 | Not reported | Not reported | Not reported |
| Ubuntu | libpython3.12-minimal | deb | noble | 3.12.3-1ubuntu0.17 | Not reported | Not reported | Not reported |
| Ubuntu | libpython3.12-stdlib | deb | noble | 3.12.3-1ubuntu0.17 | Not reported | Not reported | Not reported |
| Ubuntu | libpython3.12-testsuite | deb | noble | 3.12.3-1ubuntu0.17 | Not reported | Not reported | Not reported |
| Ubuntu | libpython3.12t64 | deb | noble | 3.12.3-1ubuntu0.17 | Not reported | Not reported | Not reported |
| Ubuntu | python3.12-dev | deb | noble | 3.12.3-1ubuntu0.17 | Not reported | Not reported | Not reported |
| Ubuntu | python3.12-doc | deb | noble | 3.12.3-1ubuntu0.17 | Not reported | Not reported | Not reported |
| Ubuntu | python3.12-examples | deb | noble | 3.12.3-1ubuntu0.17 | Not reported | Not reported | Not reported |
| Ubuntu | python3.12-full | deb | noble | 3.12.3-1ubuntu0.17 | Not reported | Not reported | Not reported |
| Ubuntu | python3.12-minimal | deb | noble | 3.12.3-1ubuntu0.17 | Not reported | Not reported | Not reported |
| Ubuntu | python3.12-nopie | deb | noble | 3.12.3-1ubuntu0.17 | Not reported | Not reported | Not reported |
| Ubuntu | python3.12-venv | deb | noble | 3.12.3-1ubuntu0.17 | Not reported | Not reported | Not reported |
Notes
[trixie] pypy3: Minor issue [bookworm] pypy3: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [idle-python3.11]Affected
Source package: [python3.11]
Details (4)
3.11.2-6+deb12u8· all · bookwormAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u8· all · bookwormAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u3· all · bookworm-securityAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u3· all · bookworm-securityAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- [libpython3.11]Affected
Source package: [python3.11]
Details (4)
3.11.2-6+deb12u8· amd64 · bookwormAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u8· arm64 · bookwormAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u3· amd64 · bookworm-securityAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u3· arm64 · bookworm-securityAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- [libpython3.11-dbg]Affected
Source package: [python3.11]
Details (4)
3.11.2-6+deb12u8· amd64 · bookwormAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u8· arm64 · bookwormAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u3· amd64 · bookworm-securityAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u3· arm64 · bookworm-securityAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- [libpython3.11-dev]Affected
Source package: [python3.11]
Details (4)
3.11.2-6+deb12u8· amd64 · bookwormAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u8· arm64 · bookwormAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u3· amd64 · bookworm-securityAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u3· arm64 · bookworm-securityAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- [libpython3.11-minimal]Affected
Source package: [python3.11]
Details (4)
3.11.2-6+deb12u8· amd64 · bookwormAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u8· arm64 · bookwormAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u3· amd64 · bookworm-securityAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u3· arm64 · bookworm-securityAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- [libpython3.11-stdlib]Affected
Source package: [python3.11]
Details (4)
3.11.2-6+deb12u8· amd64 · bookwormAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u8· arm64 · bookwormAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u3· amd64 · bookworm-securityAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u3· arm64 · bookworm-securityAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- [libpython3.11-testsuite]Affected
Source package: [python3.11]
Details (4)
3.11.2-6+deb12u8· all · bookwormAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u8· all · bookwormAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u3· all · bookworm-securityAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u3· all · bookworm-securityAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- [pypy3]Affected
Details (2)
7.3.11+dfsg-2+deb12u3· amd64 · bookwormAffected
nvd · pypy3 · debian · bookworm; nvd · pypy3 · debian · 12
7.3.11+dfsg-2+deb12u3· arm64 · bookwormAffected
nvd · pypy3 · debian · bookworm; nvd · pypy3 · debian · 12
- [pypy3-dev]Affected
Source package: [pypy3]
Details (2)
7.3.11+dfsg-2+deb12u3· all · bookwormAffected
nvd · pypy3 · debian · bookworm; nvd · pypy3 · debian · 12
7.3.11+dfsg-2+deb12u3· all · bookwormAffected
nvd · pypy3 · debian · bookworm; nvd · pypy3 · debian · 12
- [pypy3-doc]Affected
Source package: [pypy3]
Details (2)
7.3.11+dfsg-2+deb12u3· all · bookwormAffected
nvd · pypy3 · debian · bookworm; nvd · pypy3 · debian · 12
7.3.11+dfsg-2+deb12u3· all · bookwormAffected
nvd · pypy3 · debian · bookworm; nvd · pypy3 · debian · 12
- [pypy3-lib]Affected
Source package: [pypy3]
Details (2)
7.3.11+dfsg-2+deb12u3· amd64 · bookwormAffected
nvd · pypy3 · debian · bookworm; nvd · pypy3 · debian · 12
7.3.11+dfsg-2+deb12u3· arm64 · bookwormAffected
nvd · pypy3 · debian · bookworm; nvd · pypy3 · debian · 12
- [pypy3-lib-testsuite]Affected
Source package: [pypy3]
Details (2)
7.3.11+dfsg-2+deb12u3· all · bookwormAffected
nvd · pypy3 · debian · bookworm; nvd · pypy3 · debian · 12
7.3.11+dfsg-2+deb12u3· all · bookwormAffected
nvd · pypy3 · debian · bookworm; nvd · pypy3 · debian · 12
- [pypy3-tk]Affected
Source package: [pypy3]
Details (2)
7.3.11+dfsg-2+deb12u3· amd64 · bookwormAffected
nvd · pypy3 · debian · bookworm; nvd · pypy3 · debian · 12
7.3.11+dfsg-2+deb12u3· arm64 · bookwormAffected
nvd · pypy3 · debian · bookworm; nvd · pypy3 · debian · 12
- [pypy3-venv]Affected
Source package: [pypy3]
Details (2)
7.3.11+dfsg-2+deb12u3· all · bookwormAffected
nvd · pypy3 · debian · bookworm; nvd · pypy3 · debian · 12
7.3.11+dfsg-2+deb12u3· all · bookwormAffected
nvd · pypy3 · debian · bookworm; nvd · pypy3 · debian · 12
- [python3.11]Affected
Details (4)
3.11.2-6+deb12u8· amd64 · bookwormAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u8· arm64 · bookwormAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u3· amd64 · bookworm-securityAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u3· arm64 · bookworm-securityAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- [python3.11-dbg]Affected
Source package: [python3.11]
Details (4)
3.11.2-6+deb12u8· amd64 · bookwormAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u8· arm64 · bookwormAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u3· amd64 · bookworm-securityAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u3· arm64 · bookworm-securityAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- [python3.11-dev]Affected
Source package: [python3.11]
Details (4)
3.11.2-6+deb12u8· amd64 · bookwormAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u8· arm64 · bookwormAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u3· amd64 · bookworm-securityAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u3· arm64 · bookworm-securityAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- [python3.11-doc]Affected
Source package: [python3.11]
Details (4)
3.11.2-6+deb12u8· all · bookwormAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u8· all · bookwormAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u3· all · bookworm-securityAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u3· all · bookworm-securityAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- [python3.11-examples]Affected
Source package: [python3.11]
Details (4)
3.11.2-6+deb12u8· all · bookwormAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u8· all · bookwormAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u3· all · bookworm-securityAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u3· all · bookworm-securityAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
- [python3.11-full]Affected
Source package: [python3.11]
Details (4)
3.11.2-6+deb12u8· amd64 · bookwormAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u8· arm64 · bookwormAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u3· amd64 · bookworm-securityAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
3.11.2-6+deb12u3· arm64 · bookworm-securityAffected · Fixed:
3.11.2-6+deb12u9nvd · python3.11 · debian · bookworm; nvd · python3.11 · debian · 12
Observed:
References
- [https://access.redhat.com/errata/RHSA-2026:22952]
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2026_4754-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-6019]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-6019]
- [https://security-tracker.debian.org/tracker/CVE-2026-6019]
- [https://ubuntu.com/security/notices/USN-8509-1]
- [https://ubuntu.com/security/notices/USN-8744-1]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2455.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]