CVE-2026-15310 Affecting python3.14 package, versions <3.14.7-3
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIANUNSTABLE-PYTHON314-19271768
- published27 Aug 2026
- disclosed25 Aug 2026
Introduced: 25 Aug 2026
NewCVE-2026-15310 (opens in a new tab)How to fix?
Upgrade Debian:unstable python3.14 to version 3.14.7-3 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream python3.14 package and not the python3.14 package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
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://security-tracker.debian.org/tracker/CVE-2026-15310
- https://github.com/python/cpython/issues/156002
- https://github.com/python/cpython/pull/156003
- https://mail.python.org/archives/list/security-announce@python.org/thread/YUHXURX2WZGKGNA4ANYBQS2VZRYQ5JNK/
- https://github.com/python/cpython/commit/f897dbf2f36a5935700b7c2d94d4681d2136b7d4
- https://github.com/python/cpython/commit/1b424c0178a01e155fd0267dc28a8fc1159b33a8
- https://github.com/python/cpython/commit/31980e84b9a708424a0a1dfecde3fc991e313f89