Low
zipfile: bzip2/LZMA/Zstandard members decompress without a max_length bound, defeating chunked-read memory limits
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.
Announced Group revision 1
Original source ↗CVE-2026-15310
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-15310
CPython
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://github.com/python/cpython",
"vendor": "Python Software Foundation",
"product": "CPython",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "3.10.22",
"versionType": "python"
},
{
"status": "affected",
"version": "3.11.0",
"lessThan": "3.11.17",
"versionType": "python"
},
{
"status": "affected",
"version": "3.12.0",
"lessThan": "3.12.15",
"versionType": "python"
},
{
"status": "affected",
"version": "3.13.0",
"lessThan": "3.13.16",
"versionType": "python"
},
{
"status": "affected",
"version": "3.14.0",
"lessThan": "3.14.8",
"versionType": "python"
},
{
"status": "affected",
"version": "3.15.0a1",
"lessThan": "3.15.0rc2",
"versionType": "python"
}
],
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-15310
Source reference:
/cveMetadata/cveId
Publisher severity
low
Source reference: /containers/cna/metrics
- Event
- #7813 · Revision 1
- Added to Heist Feed
- Publisher date