CVE-2026-15310
lowpriority · track · 0EPSS 0.005 · 44 %ileUSEPSS · scored 2026-10-28
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (15)
Products and version ranges known to be affected.
advisories (4)
Vendor and ecosystem advisories describing this.
- BIT-libpython-2026-15310zipfile: bzip2/LZMA/Zstandard members decompress without a max_length bound, defeating chunked-read memory limits2026-09-11vendor · osvUS
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.
- BIT-python-2026-15310zipfile: bzip2/LZMA/Zstandard members decompress without a max_length bound, defeating chunked-read memory limits2026-09-11vendor · osvUS
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.
- BIT-python-min-2026-15310zipfile: bzip2/LZMA/Zstandard members decompress without a max_length bound, defeating chunked-read memory limits2026-09-11vendor · osvUS
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.
- PSF-2026-392026-08-25vendor · osvUS
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.
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (13) nvd
External citations — patches, advisories, analysis.
- https://github.com/python/cpython/commit/09a2e7e6678b4f65449e7ad8f112c48f944591e2
- https://github.com/python/cpython/commit/1b424c0178a01e155fd0267dc28a8fc1159b33a8
- https://github.com/python/cpython/commit/31980e84b9a708424a0a1dfecde3fc991e313f89
- https://github.com/python/cpython/commit/6257029de42ef89b67f3d20137de87d43e197530
- https://github.com/python/cpython/commit/9d167992b59cf5e23c66b9ed742b13f5925f7d70
- https://github.com/python/cpython/commit/c2bfbcdd1a11690507a10bc0998f95b8dc6b6fac
- https://github.com/python/cpython/commit/dcdd406ddbfc4cb29b24c3df17cbabe21d316ce1
- https://github.com/python/cpython/commit/e2311cfb3dd518f008f312fe0631f4f7490d237a
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