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.
Metrics
CVSS 3.1 9.8/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Brotli | >= 1.0.3, < 1.0.10; >= 1.1.0, < 1.1.1; >= 1.2.0, < 1.2.1 | |
| Siemens | Calibre | — |
| Siemens | Calibre ICE | — |
| Siemens | Capital | — |
| Siemens | Cloud Connector Configurator | < V1.24.3 |
| Siemens | Common Configurator (CC on IEM) | < * |
| Siemens | Common Configurator on Device (CC on Edge) | < * |
| Siemens | COMOS Walkinside | < * |
| Siemens | Data Flow Monitoring | < V3.0.18 |
| Siemens | Databus Configurator | < V4.0.1 |
| Siemens | DataXess Configurator | < V1.5.7 |
| Siemens | Designcenter X Essentials | — |
| Siemens | Desigo CC family V8 | < * |
| Siemens | Desigo CC family V9 | < * |
| Siemens | Edge OPC UA Server Configurator | < V2.3.10 |
| Siemens | Flow Creator Configurator | < V1.15.1 |
| Siemens | gDAP (gPROMS Digital Application Platform) | — |
| Siemens | Gridscale X DSA | >= V5.3, < V5.4 |
| Siemens | Gridscale X PSS®E | < V36.8.0 |
| Siemens | Heliox Dual Port 60kW | — |
| Siemens | Heliox Flex Pro | — |
| Siemens | HyperLynx | < * |
| Siemens | Industrial Edge Hub | < * |
| Siemens | Industrial Edge Management Cloud | < * |
| Siemens | Innexis Architecture Native Acceleration 2026 | < * |
| Siemens | Insights Hub | < * |
| Siemens | Opcenter Connect Electronics | < * |
| Siemens | Opcenter Connect MOM | < * |
| Siemens | Opcenter Execution Core | < * |
| Siemens | Opcenter Execution Discrete | < * |
| Siemens | Opcenter Execution Foundation | < * |
| Siemens | Opcenter Execution Pharma | < * |
| Siemens | Opcenter Execution Process | < * |
| Siemens | Opcenter Intelligence | < * |
| Siemens | Opcenter Intra Plant Logistics | < * |
| Siemens | Opcenter Quality | < * |
| Siemens | Opcenter RDnL | < * |
| Siemens | Opcenter X | < * |
| Siemens | PADS Pro Essentials | < * |
| Siemens | PADS Pro Student Edition | < * |
| Siemens | PADS Professional | < * |
| Siemens | Pathway to Learning Engineering | — |
| Siemens | PAVE360 Automotive 2026 | < * |
| Siemens | Polarion | — |
| Siemens | Process Preparation X | < * |
| Siemens | Project Server Web Administration Tool | < * |
| Siemens | SICHARGE FLEX | — |
| Siemens | SICHARGE UC | — |
| Siemens | Sifinity Go | — |
| Siemens | Sifinity Setup | — |
References
- https://github.com/andybalholm/brotli/releases/tag/v1.2.7Release Notes
- https://nodejs.org/en/blog/vulnerability/october-2026-security-releases#nodejs-brotli-decoder-out-of-bounds-write-permits-remote-code-execution-cve-2026-111497---highThird Party Advisory
- http://www.openwall.com/lists/oss-security/2026/10/23/25Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2026/10/24/6Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2026/10/26/12Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2026/10/26/13Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2026/10/26/16Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2026/11/03/2Mailing List, Third Party Advisory
- https://broccoli2shell.comThird Party Advisory
- https://github.com/advisories/GHSA-9v8h-qqgm-4m35Third Party Advisory
- https://github.com/dotnet/announcements/issues/494Issue Tracking, Mitigation, Third Party Advisory
- https://github.com/google/brotli/releases/tag/v1.0.10Release Notes
- https://github.com/google/brotli/releases/tag/v1.1.1Release Notes
- https://github.com/google/brotli/releases/tag/v1.2.1Release Notes
- https://lists.debian.org/debian-lts-announce/2026/10/msg00049.htmlMailing List, Third Party Advisory
- https://patchtheplanet.org/brotliThird Party Advisory
- https://www.aikido.dev/blog/node2shell-nodejs-brotli-rce-cve-2026-111497Third Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-045512.htmlThird Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-242944.htmlThird Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-443410.htmlThird Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-678870.htmlThird Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-898633.htmlThird Party Advisory
- https://ellio.tech/en/blog/node2shell-cve-2026-111497-rce-on-stock-nodejs-builds/Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-111497US Government Resource
Timeline
- Published
- Oct 22, 2026
- Last modified
- Nov 10, 2026
- Added to CISA KEV
- Oct 27, 2026
- NVD status
- Analyzed