PyPI/brotlicffi CVE-2026-111497: critical 9.2, exploited, EPSS 82.64%
Brotli: Out-of-bounds write in the Brotli decoder ("Node2Shell") also affects the PyPI Brotli package
Action: Upgrade brotlicffi to 1.2.1.0 or later.
pip install brotlicffi==1.2.1.0Affected
| introduced | fixed | last affected |
|---|---|---|
| 1.0.3 | 1.2.1.0 | - |
Fixed versions
| 1.2.1.0 |
Sources
- osv: GHSA-9v8h-qqgm-4m35#PyPI/brotlicffi
- nvd: CVE-2026-111497
- kev: CVE-2026-111497
- https://github.com/google/brotli/commit/0ed4268a4401abcb4472096340477cf4af7d1a2b
- https://github.com/google/brotli/commit/50a9b70a4d5e1443fc40927952276b68fffa83a0
- https://github.com/google/brotli/commit/b418fa81c48262a86a95332b0bc6d62c30aa78b6
- https://github.com/google/brotli/commit/da9806362874b9bd4b552a3af360b5d6347beb12
- https://www.cve.org/CVERecord?id=CVE-2026-111497
- https://pypi.org/project/brotlicffi
- https://pypi.org/project/Brotli
- https://opensourcemalware.com/blog/node2shell-affects-python
- https://nodejs.org/en/blog/vulnerability/october-2026-security-releases#nodejs-brotli-decoder-out-of-bounds-write-permits-remote-code-execution-cve-2026-111497---high
- https://nodejs.org/en/blog/vulnerability/october-2026-security-releases
- https://github.com/pypa/advisory-database/tree/main/vulns/brotlicffi/PYSEC-2026-4323.yaml
- https://github.com/pypa/advisory-database/tree/main/vulns/brotli/PYSEC-2026-4322.yaml
- https://github.com/google/brotli/releases/tag/v1.2.1
- https://github.com/google/brotli/releases/tag/v1.1.1
- https://github.com/google/brotli/releases/tag/v1.0.10
- https://github.com/google/brotli
CVE-2026-111497 · published · modified · JSON