CVE catalog
CVE-2023-23934
python-werkzeug: CVE-2023-23934
- Severity
- Low · CVSS 2.6
CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.51% · Oct 25, 2026
Werkzeug is a comprehensive WSGI web application library. Browsers may allow "nameless" cookies that look like `=value` instead of `key=value`. A vulnerable browser may allow a compromised application on an adjacent subdomain to exploit this to set a cookie like `=__Host-test=bad` for another subdomain. Werkzeug prior to 2.2.3 will parse the cookie `=__Host-test=bad` as __Host-test=bad`. If a Werkzeug application is running next to a vulnerable or malicious subdomain which sets such a cookie using a vulnerable browser, the Werkzeug application will see the bad cookie value but the valid cookie key. The issue is fixed in Werkzeug 2.2.3.
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-werkzeug | sid | 3.1.9-1 | fixed |
| Debian | python-werkzeug | forky | 3.1.9-1 | fixed |
| Debian | python-werkzeug | trixie | 3.1.3-2 | fixed |
| Debian | python-werkzeug | bookworm | 2.2.2-3+deb12u1 | fixed |
| Ubuntu | python-werkzeug | pro | 0.10.4+dfsg1-1ubuntu1 | vulnerable |
| Ubuntu | python-werkzeug | pro | 0.10.4+dfsg1-1ubuntu1.1 | vulnerable |
| Ubuntu | python-werkzeug | pro | 0.10.4+dfsg1-1ubuntu1.2 | vulnerable |
| Ubuntu | python-werkzeug | pro | 0.10.4+dfsg1-1ubuntu1.2+esm1 | fixed |
| Ubuntu | python-werkzeug | 18.04 | 0.12.2+dfsg1-2 | vulnerable |
| Ubuntu | python-werkzeug | 18.04 | 0.13+dfsg1-1 | vulnerable |
| Ubuntu | python-werkzeug | 18.04 | 0.14.1+dfsg1-1 | vulnerable |
| Ubuntu | python-werkzeug | 18.04 | 0.14.1+dfsg1-1ubuntu0.1 | vulnerable |
| Ubuntu | python-werkzeug | 18.04 | 0.14.1+dfsg1-1ubuntu0.2 | fixed |
| Ubuntu | python-werkzeug | 20.04 | 0.14.1+dfsg1-4 | vulnerable |
| Ubuntu | python-werkzeug | 20.04 | 0.15.6+dfsg1-1 | vulnerable |
| Ubuntu | python-werkzeug | 20.04 | 0.16.0+dfsg1-1 | vulnerable |
| Ubuntu | python-werkzeug | 20.04 | 0.16.1+dfsg1-1ubuntu1 | vulnerable |
| Ubuntu | python-werkzeug | 20.04 | 0.16.1+dfsg1-2 | vulnerable |
| Ubuntu | python-werkzeug | 20.04 | 0.16.1+dfsg1-2ubuntu0.1 | fixed |
| Ubuntu | python-werkzeug | 22.04 | 1.0.1+dfsg1-2 | vulnerable |
| Ubuntu | python-werkzeug | 22.04 | 2.0.2+dfsg1-1 | vulnerable |
| Ubuntu | python-werkzeug | 22.04 | 2.0.2+dfsg1-1ubuntu0.22.04.1 | fixed |
| Ubuntu | python-werkzeug | pro | 0.10.4+dfsg1-1ubuntu1 | vulnerable |
| Ubuntu | python-werkzeug | pro | 0.10.4+dfsg1-1ubuntu1.1 | vulnerable |
| Ubuntu | python-werkzeug | pro | 0.10.4+dfsg1-1ubuntu1.2 | vulnerable |
| Ubuntu | python-werkzeug | pro | 0.10.4+dfsg1-1ubuntu1.2+esm1 | fixed |
| Ubuntu | python-werkzeug | 18.04 | 0.12.2+dfsg1-2 | vulnerable |
| Ubuntu | python-werkzeug | 18.04 | 0.13+dfsg1-1 | vulnerable |
| Ubuntu | python-werkzeug | 18.04 | 0.14.1+dfsg1-1 | vulnerable |
| Ubuntu | python-werkzeug | 18.04 | 0.14.1+dfsg1-1ubuntu0.1 | vulnerable |
| Ubuntu | python-werkzeug | 18.04 | 0.14.1+dfsg1-1ubuntu0.2 | fixed |
| Ubuntu | python-werkzeug | 20.04 | 0.14.1+dfsg1-4 | vulnerable |
| Ubuntu | python-werkzeug | 20.04 | 0.15.6+dfsg1-1 | vulnerable |
| Ubuntu | python-werkzeug | 20.04 | 0.16.0+dfsg1-1 | vulnerable |
| Ubuntu | python-werkzeug | 20.04 | 0.16.1+dfsg1-1ubuntu1 | vulnerable |
| Ubuntu | python-werkzeug | 20.04 | 0.16.1+dfsg1-2 | vulnerable |
| Ubuntu | python-werkzeug | 20.04 | 0.16.1+dfsg1-2ubuntu0.1 | fixed |
| Ubuntu | python-werkzeug | 22.04 | 1.0.1+dfsg1-2 | vulnerable |
| Ubuntu | python-werkzeug | 22.04 | 2.0.2+dfsg1-1 | vulnerable |
| Ubuntu | python-werkzeug | 22.04 | 2.0.2+dfsg1-1ubuntu0.22.04.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | python-werkzeug | source | sid | 2.2.2-3 | not yet assigned | Not reported | [1031370] |
| Debian | python-werkzeug | source | forky | 2.2.2-3 | not yet assigned | Not reported | [1031370] |
| Debian | python-werkzeug | source | trixie | 2.2.2-3 | not yet assigned | Not reported | [1031370] |
| Debian | python-werkzeug | source | bookworm | 2.2.2-3 | not yet assigned | Not reported | [1031370] |
| Ubuntu | python-werkzeug | deb | pro | 0.10.4+dfsg1-1ubuntu1.2+esm1 | Not reported | USN-5948-1 | Not reported |
| Ubuntu | python-werkzeug | deb | 18.04 | 0.14.1+dfsg1-1ubuntu0.2 | Not reported | USN-5948-1 | Not reported |
| Ubuntu | python-werkzeug | deb | 20.04 | 0.16.1+dfsg1-2ubuntu0.1 | Not reported | USN-5948-1 | Not reported |
| Ubuntu | python-werkzeug | deb | 22.04 | 2.0.2+dfsg1-1ubuntu0.22.04.1 | Not reported | USN-5948-1 | Not reported |
| Ubuntu | python-werkzeug | deb | pro | 0.10.4+dfsg1-1ubuntu1.2+esm1 | Not reported | UBUNTU-CVE-2023-23934 | Not reported |
| Ubuntu | python-werkzeug | deb | 18.04 | 0.14.1+dfsg1-1ubuntu0.2 | Not reported | UBUNTU-CVE-2023-23934 | Not reported |
| Ubuntu | python-werkzeug | deb | 20.04 | 0.16.1+dfsg1-2ubuntu0.1 | Not reported | UBUNTU-CVE-2023-23934 | Not reported |
| Ubuntu | python-werkzeug | deb | 22.04 | 2.0.2+dfsg1-1ubuntu0.22.04.1 | Not reported | UBUNTU-CVE-2023-23934 | Not reported |
OpenFactory catalog packages
Matching against OpenFactory catalog package versions is in progress.
References
- [https://cert-portal.siemens.com/productcert/csaf/ssa-806742.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2023-23934]
- [https://osv.dev/vulnerability/DLA-3346-1]
- [https://osv.dev/vulnerability/DSA-5470-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2023-23934]
- [https://osv.dev/vulnerability/USN-5948-1]
- [https://security-tracker.debian.org/tracker/CVE-2023-23934]
- [https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-23934.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2023/wid-sec-w-2023-1497.json]
[CERT-Bund public advisories] · [CISA cybersecurity advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]