CVE catalog
CVE-2026-49853
Tornado is a Python web framework and asynchronous networking library. Prior to 6.5.6, SimpleAsyncHTTPClient shallow-copied redirected requests and removed only the Host header, leaving Authorization,
- Severity
- High · CVSS 7.7
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.45% · Oct 25, 2026
Tornado is a Python web framework and asynchronous networking library. Prior to 6.5.6, SimpleAsyncHTTPClient shallow-copied redirected requests and removed only the Host header, leaving Authorization, auth_username, auth_password, and auth_mode in place when a redirect changed scheme, host, or port. This issue is fixed in version 6.5.6.
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 | python-tornado | sid | 6.5.5-5 | vulnerable |
| Debian | python-tornado | forky | 6.5.5-5 | vulnerable |
| Debian | python-tornado | trixie | 6.4.2-3+deb13u2 | vulnerable |
| Debian | python-tornado | trixie-security | 6.4.2-3+deb13u2 | vulnerable |
| Debian | python-tornado | bookworm | 6.2.0-3+deb12u4 | vulnerable |
| Debian | python-tornado | bookworm-security | 6.2.0-3+deb12u4 | vulnerable |
| Cpe | python-tornado | Not reported | Not reported | vulnerable |
| Suse | python-tornado | manager client tools 12 | 4.2.1-17.21.1 | fixed |
| Suse | python-tornado6 | linux micro 6.1 | 6.4-slfo.1.1_5.1 | fixed |
| Suse | python-tornado6 | linux micro 6.0 | 6.4-6.1 | fixed |
| Suse | python-tornado6 | linux enterprise module for python 3 15 sp7 | 6.3.2-150400.9.18.1 | fixed |
| Suse | python-tornado6 | linux enterprise high performance computing 15 sp4-espos | 6.3.2-150400.9.18.1 | fixed |
| Suse | python-tornado6 | linux enterprise high performance computing 15 sp4-ltss | 6.3.2-150400.9.18.1 | fixed |
| Suse | python-tornado6 | linux enterprise high performance computing 15 sp5-espos | 6.3.2-150400.9.18.1 | fixed |
| Suse | python-tornado6 | linux enterprise high performance computing 15 sp5-ltss | 6.3.2-150400.9.18.1 | fixed |
| Suse | python-tornado6 | linux enterprise server 15 sp4-ltss | 6.3.2-150400.9.18.1 | fixed |
| Suse | python-tornado6 | linux enterprise server 15 sp5-ltss | 6.3.2-150400.9.18.1 | fixed |
| Suse | python-tornado6 | linux enterprise server 15 sp6-ltss | 6.3.2-150400.9.18.1 | fixed |
| Suse | python-tornado6 | linux enterprise server for sap applications 15 sp4 | 6.3.2-150400.9.18.1 | fixed |
| Suse | python-tornado6 | linux enterprise server for sap applications 15 sp5 | 6.3.2-150400.9.18.1 | fixed |
| Suse | python-tornado6 | linux enterprise server for sap applications 15 sp6 | 6.3.2-150400.9.18.1 | fixed |
| Suse | python-tornado | linux enterprise micro 5.3 | 4.5.3-150000.3.22.1 | fixed |
| Suse | python-tornado | linux enterprise micro 5.4 | 4.5.3-150000.3.22.1 | fixed |
| Suse | python-tornado | linux enterprise micro 5.5 | 4.5.3-150000.3.22.1 | fixed |
| Suse | python-tornado | linux enterprise module for basesystem 15 sp7 | 4.5.3-150000.3.22.1 | fixed |
| Suse | python-tornado | linux enterprise high performance computing 15 sp4-espos | 4.5.3-150000.3.22.1 | fixed |
| Suse | python-tornado | linux enterprise high performance computing 15 sp4-ltss | 4.5.3-150000.3.22.1 | fixed |
| Suse | python-tornado | linux enterprise high performance computing 15 sp5-espos | 4.5.3-150000.3.22.1 | fixed |
| Suse | python-tornado | linux enterprise high performance computing 15 sp5-ltss | 4.5.3-150000.3.22.1 | fixed |
| Suse | python-tornado | linux enterprise server 15 sp4-ltss | 4.5.3-150000.3.22.1 | fixed |
| Suse | python-tornado | linux enterprise server 15 sp5-ltss | 4.5.3-150000.3.22.1 | fixed |
| Suse | python-tornado | linux enterprise server 15 sp6-ltss | 4.5.3-150000.3.22.1 | fixed |
| Suse | python-tornado | linux enterprise server for sap applications 15 sp4 | 4.5.3-150000.3.22.1 | fixed |
| Suse | python-tornado | linux enterprise server for sap applications 15 sp5 | 4.5.3-150000.3.22.1 | fixed |
| Suse | python-tornado | linux enterprise server for sap applications 15 sp6 | 4.5.3-150000.3.22.1 | fixed |
| Suse | python-tornado6 | linux enterprise server 16.0 | 6.5-160000.5.1 | fixed |
| Suse | python-tornado6 | linux enterprise server for sap applications 16.0 | 6.5-160000.5.1 | fixed |
| Opensuse | python-tornado6 | leap 16.0 | 6.5-160000.5.1 | fixed |
| Suse | python-tornado6 | linux micro 6.2 | 6.5-160000.5.1 | fixed |
| Opensuse | python-tornado6 | tumbleweed | 6.5.7-1.1 | fixed |
| Ubuntu | python-tornado | pro | 6.1.0-1build1 | vulnerable |
| Ubuntu | python-tornado | pro | 6.1.0-2 | vulnerable |
| Ubuntu | python-tornado | pro | 6.1.0-3 | vulnerable |
| Ubuntu | python-tornado | pro | 6.1.0-3build1 | vulnerable |
| Ubuntu | python-tornado | pro | 6.1.0-3ubuntu0.1~esm1 | vulnerable |
| Ubuntu | python-tornado | pro | 6.1.0-3ubuntu0.1~esm2 | vulnerable |
| Ubuntu | python-tornado | pro | 6.1.0-3ubuntu0.1~esm4 | vulnerable |
| Ubuntu | python-tornado | pro | 6.1.0-3ubuntu0.1~esm5 | vulnerable |
| Ubuntu | python-tornado | pro | 6.1.0-3ubuntu0.1~esm6 | vulnerable |
| Ubuntu | python-tornado | 24.04 | 6.3.2-1 | vulnerable |
| Ubuntu | python-tornado | 24.04 | 6.4.0-0ubuntu1 | vulnerable |
| Ubuntu | python-tornado | 24.04 | 6.4.0-1 | vulnerable |
| Ubuntu | python-tornado | 24.04 | 6.4.0-1build1 | vulnerable |
| Ubuntu | python-tornado | 24.04 | 6.4.0-1ubuntu0.1 | vulnerable |
| Ubuntu | python-tornado | 24.04 | 6.4.0-1ubuntu0.2 | vulnerable |
| Ubuntu | python-tornado | 24.04 | 6.4.0-1ubuntu0.4 | vulnerable |
| Ubuntu | python-tornado | 24.04 | 6.4.0-1ubuntu0.5 | vulnerable |
| Ubuntu | python-tornado | 24.04 | 6.4.0-1ubuntu0.6 | vulnerable |
| Ubuntu | python-tornado | 26.10 | 6.5.4-0.1 | vulnerable |
| Ubuntu | python-tornado | 26.10 | 6.5.5-2 | vulnerable |
| Ubuntu | python-tornado | 26.10 | 6.5.5-4 | vulnerable |
| Ubuntu | python-tornado | 26.10 | 6.5.5-5 | vulnerable |
| Ubuntu | python-tornado | 26.10 | 6.5.5-5ubuntu1.1 | vulnerable |
| Ubuntu | python-tornado | 26.04 | 6.4.2-3 | vulnerable |
| Ubuntu | python-tornado | 26.04 | 6.5.2-3 | vulnerable |
| Ubuntu | python-tornado | 26.04 | 6.5.4-0.1 | vulnerable |
| Ubuntu | python-tornado | 26.04 | 6.5.4-0.1ubuntu0.1 | vulnerable |
| Ubuntu | python-tornado | 26.04 | 6.5.4-0.1ubuntu0.2 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | python-tornado | source | sid | (unfixed) | not yet assigned | Not reported | [1142277] |
| Debian | python-tornado | source | forky | (unfixed) | not yet assigned | Not reported | [1142277] |
| Debian | python-tornado | source | trixie | (unfixed) | not yet assigned | Not reported | [1142277] |
| Debian | python-tornado | source | bookworm | (unfixed) | not yet assigned | Not reported | [1142277] |
| Suse | python-tornado | rpm | manager client tools 12 | 4.2.1-17.21.1 | Not reported | SUSE-SU-2026:3291-1 | Not reported |
| Suse | python-tornado6 | rpm | linux micro 6.1 | 6.4-slfo.1.1_5.1 | Not reported | SUSE-SU-2026:22445-1 | Not reported |
| Suse | python-tornado6 | rpm | linux micro 6.0 | 6.4-6.1 | Not reported | SUSE-SU-2026:22430-1 | Not reported |
| Suse | python-tornado6 | rpm | linux enterprise module for python 3 15 sp7 | 6.3.2-150400.9.18.1 | Not reported | SUSE-SU-2026:2725-1 | Not reported |
| Suse | python-tornado6 | rpm | linux enterprise high performance computing 15 sp4-espos | 6.3.2-150400.9.18.1 | Not reported | SUSE-SU-2026:2725-1 | Not reported |
| Suse | python-tornado6 | rpm | linux enterprise high performance computing 15 sp4-ltss | 6.3.2-150400.9.18.1 | Not reported | SUSE-SU-2026:2725-1 | Not reported |
| Suse | python-tornado6 | rpm | linux enterprise high performance computing 15 sp5-espos | 6.3.2-150400.9.18.1 | Not reported | SUSE-SU-2026:2725-1 | Not reported |
| Suse | python-tornado6 | rpm | linux enterprise high performance computing 15 sp5-ltss | 6.3.2-150400.9.18.1 | Not reported | SUSE-SU-2026:2725-1 | Not reported |
| Suse | python-tornado6 | rpm | linux enterprise server 15 sp4-ltss | 6.3.2-150400.9.18.1 | Not reported | SUSE-SU-2026:2725-1 | Not reported |
| Suse | python-tornado6 | rpm | linux enterprise server 15 sp5-ltss | 6.3.2-150400.9.18.1 | Not reported | SUSE-SU-2026:2725-1 | Not reported |
| Suse | python-tornado6 | rpm | linux enterprise server 15 sp6-ltss | 6.3.2-150400.9.18.1 | Not reported | SUSE-SU-2026:2725-1 | Not reported |
| Suse | python-tornado6 | rpm | linux enterprise server for sap applications 15 sp4 | 6.3.2-150400.9.18.1 | Not reported | SUSE-SU-2026:2725-1 | Not reported |
| Suse | python-tornado6 | rpm | linux enterprise server for sap applications 15 sp5 | 6.3.2-150400.9.18.1 | Not reported | SUSE-SU-2026:2725-1 | Not reported |
| Suse | python-tornado6 | rpm | linux enterprise server for sap applications 15 sp6 | 6.3.2-150400.9.18.1 | Not reported | SUSE-SU-2026:2725-1 | Not reported |
| Suse | python-tornado | rpm | linux enterprise micro 5.3 | 4.5.3-150000.3.22.1 | Not reported | SUSE-SU-2026:2726-1 | Not reported |
| Suse | python-tornado | rpm | linux enterprise micro 5.4 | 4.5.3-150000.3.22.1 | Not reported | SUSE-SU-2026:2726-1 | Not reported |
| Suse | python-tornado | rpm | linux enterprise micro 5.5 | 4.5.3-150000.3.22.1 | Not reported | SUSE-SU-2026:2726-1 | Not reported |
| Suse | python-tornado | rpm | linux enterprise module for basesystem 15 sp7 | 4.5.3-150000.3.22.1 | Not reported | SUSE-SU-2026:2726-1 | Not reported |
| Suse | python-tornado | rpm | linux enterprise high performance computing 15 sp4-espos | 4.5.3-150000.3.22.1 | Not reported | SUSE-SU-2026:2726-1 | Not reported |
| Suse | python-tornado | rpm | linux enterprise high performance computing 15 sp4-ltss | 4.5.3-150000.3.22.1 | Not reported | SUSE-SU-2026:2726-1 | Not reported |
| Suse | python-tornado | rpm | linux enterprise high performance computing 15 sp5-espos | 4.5.3-150000.3.22.1 | Not reported | SUSE-SU-2026:2726-1 | Not reported |
| Suse | python-tornado | rpm | linux enterprise high performance computing 15 sp5-ltss | 4.5.3-150000.3.22.1 | Not reported | SUSE-SU-2026:2726-1 | Not reported |
| Suse | python-tornado | rpm | linux enterprise server 15 sp4-ltss | 4.5.3-150000.3.22.1 | Not reported | SUSE-SU-2026:2726-1 | Not reported |
| Suse | python-tornado | rpm | linux enterprise server 15 sp5-ltss | 4.5.3-150000.3.22.1 | Not reported | SUSE-SU-2026:2726-1 | Not reported |
| Suse | python-tornado | rpm | linux enterprise server 15 sp6-ltss | 4.5.3-150000.3.22.1 | Not reported | SUSE-SU-2026:2726-1 | Not reported |
| Suse | python-tornado | rpm | linux enterprise server for sap applications 15 sp4 | 4.5.3-150000.3.22.1 | Not reported | SUSE-SU-2026:2726-1 | Not reported |
| Suse | python-tornado | rpm | linux enterprise server for sap applications 15 sp5 | 4.5.3-150000.3.22.1 | Not reported | SUSE-SU-2026:2726-1 | Not reported |
| Suse | python-tornado | rpm | linux enterprise server for sap applications 15 sp6 | 4.5.3-150000.3.22.1 | Not reported | SUSE-SU-2026:2726-1 | Not reported |
| Suse | python-tornado6 | rpm | linux enterprise server 16.0 | 6.5-160000.5.1 | Not reported | SUSE-SU-2026:22373-1 | Not reported |
| Suse | python-tornado6 | rpm | linux enterprise server for sap applications 16.0 | 6.5-160000.5.1 | Not reported | SUSE-SU-2026:22373-1 | Not reported |
| Opensuse | python-tornado6 | rpm | leap 16.0 | 6.5-160000.5.1 | Not reported | OPENSUSE-SU-2026:21067-1 | Not reported |
| Suse | python-tornado6 | rpm | linux micro 6.2 | 6.5-160000.5.1 | Not reported | SUSE-SU-2026:22286-1 | Not reported |
| Opensuse | python-tornado6 | rpm | tumbleweed | 6.5.7-1.1 | Not reported | OPENSUSE-SU-2026:11027-1 | Not reported |
Notes
[trixie] python-tornado: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [python3-tornado]Affected
Source package: [python-tornado]
Details (4)
6.2.0-3+deb12u4· amd64 · bookwormAffected
nvd · python-tornado · debian · bookworm; nvd · python-tornado · debian · 12
6.2.0-3+deb12u4· arm64 · bookwormAffected
nvd · python-tornado · debian · bookworm; nvd · python-tornado · debian · 12
6.2.0-3+deb12u4· amd64 · bookworm-securityAffected
nvd · python-tornado · debian · bookworm; nvd · python-tornado · debian · 12
6.2.0-3+deb12u4· arm64 · bookworm-securityAffected
nvd · python-tornado · debian · bookworm; nvd · python-tornado · debian · 12
- [python-tornado-doc]Affected
Source package: [python-tornado]
Details (4)
6.2.0-3+deb12u4· all · bookwormAffected
nvd · python-tornado · debian · bookworm; nvd · python-tornado · debian · 12
6.2.0-3+deb12u4· all · bookwormAffected
nvd · python-tornado · debian · bookworm; nvd · python-tornado · debian · 12
6.2.0-3+deb12u4· all · bookworm-securityAffected
nvd · python-tornado · debian · bookworm; nvd · python-tornado · debian · 12
6.2.0-3+deb12u4· all · bookworm-securityAffected
nvd · python-tornado · debian · bookworm; nvd · python-tornado · debian · 12
[Debian 13 (Trixie)]
- [python3-tornado]Affected
Source package: [python-tornado]
Details (4)
6.4.2-3+deb13u2· amd64 · trixieAffected
nvd · python-tornado · debian · 13
6.4.2-3+deb13u2· arm64 · trixieAffected
nvd · python-tornado · debian · 13
6.4.2-3+deb13u2· amd64 · trixie-securityAffected
nvd · python-tornado · debian · 13
6.4.2-3+deb13u2· arm64 · trixie-securityAffected
nvd · python-tornado · debian · 13
- [python-tornado-doc]Affected
Source package: [python-tornado]
Details (4)
6.4.2-3+deb13u2· all · trixieAffected
nvd · python-tornado · debian · 13
6.4.2-3+deb13u2· all · trixieAffected
nvd · python-tornado · debian · 13
6.4.2-3+deb13u2· all · trixie-securityAffected
nvd · python-tornado · debian · 13
6.4.2-3+deb13u2· all · trixie-securityAffected
nvd · python-tornado · debian · 13
[openSUSE Tumbleweed]
- [python313-tornado6]Unknown
Source package: [python-tornado6]
Details (1)
6.5.8-1.1· x86_64 · tumbleweedUnknown · Fixed:
6.5.7-1.1Version impact unknown
nvd · python-tornado6 · opensuse · tumbleweed
- [python314-tornado6]Unknown
Source package: [python-tornado6]
Details (1)
6.5.8-1.1· x86_64 · tumbleweedUnknown · Fixed:
6.5.7-1.1Version impact unknown
nvd · python-tornado6 · opensuse · tumbleweed
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_21067-1.json]
- [https://github.com/tornadoweb/tornado/commit/aba2569f7ed7a6bdbef816658fb6b7182531b751]
- [https://github.com/tornadoweb/tornado/pull/3626]
- [https://github.com/tornadoweb/tornado/releases/tag/v6.5.6]
- [https://github.com/tornadoweb/tornado/security/advisories/GHSA-3x9g-8vmp-wqvf]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-49853]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-49853]
- [https://osv.dev/vulnerability/SUSE-SU-2026:22286-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:22373-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:22430-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:22445-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:2725-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:2726-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:3291-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-49853]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:11027-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:21067-1]
- [https://security-tracker.debian.org/tracker/CVE-2026-49853]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-49853.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3870.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]