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Improper Input Validation The advisory has been revoked - it doesn't affect any version of package python-werkzeug.src  (opens in a new tab)

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EPSS
0.27% (51st percentile)

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  • Snyk IDSNYK-RHEL10-PYTHONWERKZEUGSRC-12596356
  • published10 Sept 2025
  • disclosed14 Feb 2023
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Introduced: 14 Feb 2023

CVE-2023-23934  (opens in a new tab)
CWE-20  (opens in a new tab)

Amendment

The Red Hat security team deemed this advisory irrelevant for RHEL:10.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python-werkzeug.src package and not the python-werkzeug.src package as distributed by RHEL.

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.