Improper Check for Unusual or Exceptional Conditions Affecting mitmproxy package, versions <12.2.1-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
1.3% (67th percentile)

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  • Snyk IDSNYK-WOLFILATEST-MITMPROXY-15878594
  • published3 Apr 2026
  • disclosed7 Feb 2023

Introduced: 7 Feb 2023

CVE-2023-23931  (opens in a new tab)
CWE-754  (opens in a new tab)

How to fix?

Upgrade Wolfi mitmproxy to version 12.2.1-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream mitmproxy package and not the mitmproxy package as distributed by Wolfi. See How to fix? for Wolfi relevant fixed versions and status.

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. In affected versions Cipher.update_into would accept Python objects which implement the buffer protocol, but provide only immutable buffers. This would allow immutable objects (such as bytes) to be mutated, thus violating fundamental rules of Python and resulting in corrupted output. This now correctly raises an exception. This issue has been present since update_into was originally introduced in cryptography 1.8.

CVSS Base Scores

version 3.1