BIT-python-2025-12781

BIT-python-2025-12781 PUBLISHED CVSS 6.300000190734863 MEDIUM

base64.b64decode() always accepts "+/" characters, despite setting altchars

Risk Scores

CVSS v4.0

6.300000190734863

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected Products

Vendor	Product	Versions
Bitnami	python	0, 0, 0

Timeline

Jan 26, 2026 CVE Published
Jan 26, 2026 CVE Updated

References

https://github.com/python/cpython/commit/13360efd385d1a7d0659beba03787ea3d063ef9b url
https://github.com/python/cpython/commit/1be80bec7960f5ccd059e75f3dfbd45fca302947 url
https://github.com/python/cpython/commit/9060b4abbe475591b6230b23c2afefeff26fcca5 url
https://github.com/python/cpython/commit/e95e783dff443b68e8179fdb57737025bf02ba76 url
https://github.com/python/cpython/commit/fd17ee026fa9b67f6288cbafe374a3e479fe03a5 url
https://github.com/python/cpython/issues/125346 url
https://github.com/python/cpython/pull/141128 url
https://mail.python.org/archives/list/security-announce@python.org/thread/KRI7GC6S27YV5NJ4FPDALS2WI5ENAFJ6/ url
https://nvd.nist.gov/vuln/detail/CVE-2025-12781 url

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