Detections
Analytics

CVE-2026-15310

low

Description

When decompressing crafted zip files using the bzip/LZMA/Zstandard compressions, Python could use an attacker-controlled size to pre-allocate memory, possibly resulting in memory exhaustion.

References

https://mail.python.org/archives/list/[email protected]/thread/YUHXURX2WZGKGNA4ANYBQS2VZRYQ5JNK/

https://github.com/python/cpython/pull/156003

https://github.com/python/cpython/issues/156002

https://github.com/python/cpython/commit/f897dbf2f36a5935700b7c2d94d4681d2136b7d4

https://github.com/python/cpython/commit/f507e6946a3194e83e1d7b8ee6e14567175e46de

https://github.com/python/cpython/commit/e2311cfb3dd518f008f312fe0631f4f7490d237a

https://github.com/python/cpython/commit/dcdd406ddbfc4cb29b24c3df17cbabe21d316ce1

https://github.com/python/cpython/commit/c2bfbcdd1a11690507a10bc0998f95b8dc6b6fac

https://github.com/python/cpython/commit/9d167992b59cf5e23c66b9ed742b13f5925f7d70

https://github.com/python/cpython/commit/6257029de42ef89b67f3d20137de87d43e197530

https://github.com/python/cpython/commit/31980e84b9a708424a0a1dfecde3fc991e313f89

https://github.com/python/cpython/commit/1b424c0178a01e155fd0267dc28a8fc1159b33a8

https://github.com/python/cpython/commit/09a2e7e6678b4f65449e7ad8f112c48f944591e2

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-65519

Details

Source: Mitre, NVD

Published: 2026-08-25

Updated: 2026-10-02

Named Vulnerability: GHSA-xj79-6hh5-9w6q

Risk Information

CVSS v2

Base Score: 2.6

Vector: CVSS2#AV:N/AC:H/Au:N/C:N/I:N/A:P

Severity: Low

CVSS v3

Base Score: 3.1

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L

Severity: Low

CVSS v4

Base Score: 2.1

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Severity: Low

EPSS

EPSS: 0.00533