CVE-2026-119170: Python hashlib FIPS algorithm enforcement regression

CVE-2026-119170 · Severity: info · Published 2026-11-06

Python's cryptographic hash library (hashlib) contains a regression in how it enforces FIPS-approved algorithms when operating in FIPS mode. This affects only Python 3.14.10 when used with OpenSSL in FIPS mode. The regression could allow applications to use non-FIPS-compliant hashing functions when they should be restricted, potentially violating compliance requirements for security-sensitive deployments.

Technologies: Python CPython. Vendors: Python.

Quick answers

Is CVE-2026-119170 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-119170 being exploited in the wild.
How severe is CVE-2026-119170?
Informational severity, published 6 November 2026.
Which products and versions are affected?
Python CPython 3.14.10.
Is there a fix for CVE-2026-119170?
Yes: fixed in Python 3.14 (patched on November 6, 2026). Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-119170 attacked?
It is attacked with local access, in a software library.
Am I affected by CVE-2026-119170?
Check whether you run Python CPython at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • Fixed in: Python 3.14 (patched on November 6, 2026)

Technical details

The vulnerability is a regression in the hashlib module's handling of the -fips property when usedforsecurity=True is specified. When OpenSSL operates in FIPS mode, only approved algorithms should be available; this bug caused incorrect enforcement of that restriction in Python 3.14.10. The fix requires proper application of the -fips property during algorithm selection.

Affected products

  • Python CPython 3.14.10

Timeline

  • 2026-10-29: disclosed
  • 2026-11-06: patched

References

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