DEBIAN-CVE-2023-23934

Advisory lineage Upstream: 1 Downstream: 2
Upstream
CVE-2023-23934
Published: 14 Feb 2023, 20:15
Last modified:28 Apr 2026, 20:25

Vulnerability Summary

Overall Risk (default)
low
14/100
CVSS Score
3.5 LOW
3.1 (osv_debian)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

14 Feb 2023, 20:15
Published
Vulnerability first disclosed
28 Apr 2026, 20:25
Last Modified
Vulnerability information updated

Description

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.

CVSS Metrics

  • v3.1•LOW•Score: 3.5CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Affected Systems

  • debian•python-werkzeug

    < 1.0.1+dfsg1-2+deb11u1 | < 2.2.2-3 | < 2.2.2-3 | < 2.2.2-3

References (1)