CVE-2026-111497
critical CISA KEVA 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 unauthent…
Vendor / product: Google — brotli
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Required action (CISA)
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Affected products
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
References
- https://github.com/andybalholm/brotli/releases/tag/v1.2.7 cve-coordination@google.com
- https://nodejs.org/en/blog/vulnerability/october-2026-security-releases#nodejs-brotli-deco... cve-coordination@google.com
- http://www.openwall.com/lists/oss-security/2026/10/23/25 af854a3a-2127-422b-91ae-364da2661108
- http://www.openwall.com/lists/oss-security/2026/10/24/6 af854a3a-2127-422b-91ae-364da2661108
- http://www.openwall.com/lists/oss-security/2026/10/26/12 af854a3a-2127-422b-91ae-364da2661108
- http://www.openwall.com/lists/oss-security/2026/10/26/13 af854a3a-2127-422b-91ae-364da2661108
- http://www.openwall.com/lists/oss-security/2026/10/26/16 af854a3a-2127-422b-91ae-364da2661108
- http://www.openwall.com/lists/oss-security/2026/11/03/2 af854a3a-2127-422b-91ae-364da2661108
- https://broccoli2shell.com af854a3a-2127-422b-91ae-364da2661108
- https://github.com/advisories/GHSA-9v8h-qqgm-4m35 af854a3a-2127-422b-91ae-364da2661108
- https://github.com/dotnet/announcements/issues/494 af854a3a-2127-422b-91ae-364da2661108
- https://github.com/google/brotli/releases/tag/v1.0.10 af854a3a-2127-422b-91ae-364da2661108
- https://github.com/google/brotli/releases/tag/v1.1.1 af854a3a-2127-422b-91ae-364da2661108
- https://github.com/google/brotli/releases/tag/v1.2.1 af854a3a-2127-422b-91ae-364da2661108
- https://lists.debian.org/debian-lts-announce/2026/10/msg00049.html af854a3a-2127-422b-91ae-364da2661108
- https://patchtheplanet.org/brotli af854a3a-2127-422b-91ae-364da2661108
- https://www.aikido.dev/blog/node2shell-nodejs-brotli-rce-cve-2026-111497 af854a3a-2127-422b-91ae-364da2661108
- https://cert-portal.siemens.com/productcert/html/ssa-045512.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
- https://cert-portal.siemens.com/productcert/html/ssa-443410.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
- https://cert-portal.siemens.com/productcert/html/ssa-898633.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
- https://ellio.tech/en/blog/node2shell-cve-2026-111497-rce-on-stock-nodejs-builds/ 134c704f-9b21-4f2e-91b3-4a467353bcc0
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-111497 134c704f-9b21-4f2e-91b3-4a467353bcc0