CVE-2026-3446

N/A

Description

When calling base64.b64decode() or related functions the decoding process would stop after encountering the first padded quad regardless of whether there was more information to be processed. This can lead to data being accepted which may be processed differently by other implementations. Use "validate=True" to enable stricter processing of base64 data.

CVE Details

CVSS v3.1 ScoreN/A

Published4/10/2026

Last Modified4/10/2026

Sourcenvd

Honeypot Sightings0

References

https://github.com/python/cpython/commit/1f9958f909c1b41a4ffc0b613ef8ec8fa5e7c474(cna@python.org)

https://github.com/python/cpython/commit/4561f6418a691b3e89aef0901f53fe0dfb7f7c0e(cna@python.org)

https://github.com/python/cpython/commit/e31c55121620189a0d1a07b689762d8ca9c1b7fa(cna@python.org)

https://github.com/python/cpython/issues/145264(cna@python.org)

https://github.com/python/cpython/pull/145267(cna@python.org)

https://mail.python.org/archives/list/security-announce@python.org/thread/F5ZT5ICGJ6CKXVUJ34YBVY7WOZ5SHG53/(cna@python.org)

IOC Correlations

No correlations recorded

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