Vulnerability 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.
Related Weaknesses (CWE)
References
- https://github.com/python/cpython/commit/1b424c0178a01e155fd0267dc28a8fc1159b33a
- https://github.com/python/cpython/commit/31980e84b9a708424a0a1dfecde3fc991e313f8
- https://github.com/python/cpython/commit/9d167992b59cf5e23c66b9ed742b13f5925f7d7
- https://github.com/python/cpython/commit/e2311cfb3dd518f008f312fe0631f4f7490d237
- https://github.com/python/cpython/commit/f507e6946a3194e83e1d7b8ee6e14567175e46d
- https://github.com/python/cpython/commit/f897dbf2f36a5935700b7c2d94d4681d2136b7d
- https://github.com/python/cpython/issues/156002
- https://github.com/python/cpython/pull/156003
- https://mail.python.org/archives/list/[email protected]/thread/YUHXUR
FAQ
What is CVE-2026-15310?
CVE-2026-15310 is a documented vulnerability. 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.
How severe is CVE-2026-15310?
CVSS scoring is not yet available for CVE-2026-15310. Check NVD for updates.
Is there a patch for CVE-2026-15310?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.