python/python CVE-2026-6100: critical 9.1
Use-after-free in lzma.LZMADecompressor, bz2.BZ2Decompressor, and gzip.GzipFile after re-use under memory pressure
Action: Upgrade python to 3.10.21 (3.10.x), 3.11.16 (3.11.x), 3.12.14 (3.12.x) or 3.13.14 (3.13.x) or later.
Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 3.10.21 | - |
| 3.11.0 | 3.11.16 | - |
| 3.12.0 | 3.12.14 | - |
| 3.13.0 | 3.13.14 | - |
Fixed versions
| 3.10.21 | 3.11.16 | 3.12.14 | 3.13.14 |
Sources
- python-runtime: PSF-2026-18
- https://mail.python.org/archives/list/security-announce@python.org/thread/HTWB2Z6KT5QQX4RYEZAFININDHNOSIF3/
- https://www.cve.org/CVERecord?id=CVE-2026-6100
CVE-2026-6100 · published · modified · JSON