| Name | CVE-2026-111497 |
| Description | A buffer overflow vulnerability in the Brotli decoder (c/dec/decode.c) in Google Brotli versions 1.0.3 through 1.2.0 on all platforms allows a remote unauthenticated attacker to corrupt adjacent decoder state memory, disclose sensitive memory contents, cause a denial of service, or potentially execute arbitrary code using a crafted Brotli-compressed stream. Users need to update any Brotli libraries or binaries between 1.0.3 through 1.2.0 to the latest available version: 1.0.10 or 1.1.1 or 1.2.1. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-4855-1, DSA-6582-1 |
| Debian Bugs | 1151690, 1151700 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| brotli (PTS) | bookworm | 1.0.9-2 | vulnerable |
| bookworm (security) | 1.0.9-2+deb12u1 | fixed | |
| trixie | 1.1.0-2 | vulnerable | |
| trixie (security) | 1.1.0-2+deb13u1 | fixed | |
| forky, sid | 1.2.0-4.1 | fixed | |
| edk2 (PTS) | bookworm | 2022.11-6+deb12u2 | vulnerable |
| bookworm (security) | 2022.11-6+deb12u1 | vulnerable | |
| trixie | 2025.02-8+deb13u1 | vulnerable | |
| forky, sid | 2026.08+ds-3 | fixed | |
| nodejs (PTS) | bookworm | 18.20.4+dfsg-1~deb12u2 | vulnerable |
| bookworm (security) | 18.20.4+dfsg-1~deb12u3 | vulnerable | |
| trixie | 20.19.2+dfsg-1+deb13u2 | vulnerable | |
| trixie (security) | 20.19.2+dfsg-1+deb13u3 | vulnerable | |
| forky, sid | 24.22.2+dfsg+~cs24.19.2-1 | fixed | |
| python-brotlicffi (PTS) | trixie | 1.1.0.0+ds1-1 | vulnerable |
| forky, sid | 1.2.1.0+ds-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| brotli | source | bookworm | 1.0.9-2+deb12u1 | DLA-4855-1 | ||
| brotli | source | trixie | 1.1.0-2+deb13u1 | DSA-6582-1 | ||
| brotli | source | (unstable) | 1.2.0-4.1 | 1151690 | ||
| edk2 | source | (unstable) | 2026.08+ds-3 | 1151700 | ||
| nodejs | source | (unstable) | 24.22.1+dfsg+~cs24.19.2-1 | unimportant | ||
| python-brotlicffi | source | (unstable) | 1.2.1.0+ds-1 | unimportant |
[trixie] - edk2 <no-dsa> (Minor issue)
nodejs and python-brotlicffi use system provided brotli library
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
Introduced with: https://github.com/google/brotli/commit/35e69fc7cf9421ab04ffc9d52cb36d07fa12984a (v1.0.3)
Fixed by: https://github.com/google/brotli/commit/b418fa81c48262a86a95332b0bc6d62c30aa78b6 (v1.2.1)
Fixed by: https://github.com/google/brotli/commit/da9806362874b9bd4b552a3af360b5d6347beb12 (v1.1.1)
Fixed by: https://github.com/google/brotli/commit/50a9b70a4d5e1443fc40927952276b68fffa83a0 (v1.0.10)
Node.js mitigation: https://github.com/nodejs/node/commit/a18ec92752cd05ad5335bfaa5420a258b81f9afc (v22.23.4)
https://project-zero.issues.chromium.org/issues/565308158