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2.1 Low

CVE-2026-15310 When decompressing crafted zip files using the bzip/LZMA/Zstandard compressions, Python could use an…

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.

Affected products and versions

Product Affected versions Fixed in
CPython 3.15 3.15.0a1 → < 3.15.0rc2 3.15.0rc2
CPython 3.14 3.14.0 → < 3.14.8 3.14.8
CPython 3.13 3.13.0 → < 3.13.16 3.13.16
CPython 3.12 3.12.0 → < 3.12.15 3.12.15
CPython 3.11 3.11.0 → < 3.11.17 3.11.17
CPython 3.10 earliest → < 3.10.22 3.10.22

References

Timeline

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