6.0
Medium
CVE-2026-3446 When calling base64.b64decode() or related functions the decoding process would stop after encountering the first padded…
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.
Affected products and versions
Other CVEs of CPython
The 80 CVEs of CPython →
CVE-2026-119170
Regression in FIPS enforcement of hash algorithms affecting only Python 3.14.10
8.2
High
CVE-2026-116566
socket.getaddrinfo() previously accepted null bytes within *host* and *port* parameters which can cause the values to be…
5.3
Medium
CVE-2026-103995
Lenient parsing of integers for response body and chunk framing
2.0
Low
CVE-2026-115557
Python has added a denylist for known compromised certificates to the "ssl" module to ensure user safety even without…
9.4
Critical