Vulnerability details
CVE-2026-111497
Actively exploited
Google BrotliSiemens Cloud Connector ConfiguratorSiemens Common Configurator on DeviceSiemens Common ConfiguratorSiemens Data Flow MonitoringSiemens DataXess Configurator
Out-of-Bounds Write in Google Brotli Decoder
CVSS 4.0
9.2Critical
Official 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.
Related news
-
OpenAI Launches GPT-6 Cyber After AI Helps Find 81 Firefox Flaws, 948 Linux Exploits
The Hacker News · 2 d ago
-
November 2026 Patch Tuesday forecast: Old software continues to bite
Help Net Security · 3 d ago
-
Product showcase: Sweet Virtual Patching stops HTTP2Shell while fixes catch up
Help Net Security · 6 d ago
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.2Critical | 4.0 | CVEProject cvelistV5 (CNA) (Google) | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Brotli | 1.0.3 ≤ v < 1.0.10 | CVEProject cvelistV5 (CNA) | |
| Brotli | 1.1.0 ≤ v < 1.1.1 | CVEProject cvelistV5 (CNA) | |
| Brotli | 1.2.0 ≤ v < 1.2.1 | CVEProject cvelistV5 (CNA) | |
| Siemens | Cloud Connector Configurator | v < V1.24.3 | CVEProject cvelistV5 (CNA) |
| Siemens | Common Configurator on Device (CC on Edge) | All | CVEProject cvelistV5 (CNA) |
| Siemens | Common Configurator (CC on IEM) | All | CVEProject cvelistV5 (CNA) |
| Siemens | Data Flow Monitoring | v < V3.0.18 | CVEProject cvelistV5 (CNA) |
| Siemens | DataXess Configurator | v < V1.5.7 | CVEProject cvelistV5 (CNA) |
| Siemens | Databus Configurator | v < V4.0.1 | CVEProject cvelistV5 (CNA) |
| Siemens | Desigo CC family V8 | All | CVEProject cvelistV5 (CNA) |
| Siemens | Desigo CC family V9 | All | CVEProject cvelistV5 (CNA) |
| Siemens | Edge OPC UA Server Configurator | v < V2.3.10 | CVEProject cvelistV5 (CNA) |
| Siemens | Flow Creator Configurator | v < V1.15.1 | CVEProject cvelistV5 (CNA) |
| Siemens | Gridscale X DSA | V5.3 ≤ v < V5.4 | CVEProject cvelistV5 (CNA) |
| Siemens | Gridscale X PSS®E | v < V36.8.0 | CVEProject cvelistV5 (CNA) |
| Siemens | Industrial Edge Hub | All | CVEProject cvelistV5 (CNA) |
| Siemens | Industrial Edge Management Cloud | All | CVEProject cvelistV5 (CNA) |
| Siemens | RUGGEDCOM APE1808 | All | CVEProject cvelistV5 (CNA) |
References and advisories
22- 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 patch
- https://github.com/andybalholm/brotli/releases/tag/v1.2.7 release-notesthird-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-2026-111497 government-resource
- https://github.com/advisories/GHSA-9v8h-qqgm-4m35
- http://www.openwall.com/lists/oss-security/2026/10/23/25
- https://lists.debian.org/debian-lts-announce/2026/10/msg00049.html
- http://www.openwall.com/lists/oss-security/2026/10/24/6
- http://www.openwall.com/lists/oss-security/2026/10/26/12
- http://www.openwall.com/lists/oss-security/2026/10/26/13
- https://www.aikido.dev/blog/node2shell-nodejs-brotli-rce-cve-2026-111497
- https://broccoli2shell.com
- https://github.com/dotnet/announcements/issues/494
- 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://patchtheplanet.org/brotli
- http://www.openwall.com/lists/oss-security/2026/10/26/16
- http://www.openwall.com/lists/oss-security/2026/11/03/2
- https://cert-portal.siemens.com/productcert/html/ssa-898633.html
- https://cert-portal.siemens.com/productcert/html/ssa-443410.html
- https://cert-portal.siemens.com/productcert/html/ssa-045512.html
Kolun on Telegram @kolunsec
Exploited CVEs, key news and a daily digest
Alerts for this product's next CVEsFollow the product to get new vulnerabilities on Telegram.
Details
- Published
- 2026-10-22
- Last updated
- 2026-11-06
- State
- Published
- Assigner (CNA)
CISA KEV catalog
- Date added
- 2026-10-27
- Due date
- 2026-11-10
- Used in ransomware
- Unknown
Exploit prediction (EPSS)
82.64%
Probability of exploitation in 30 days
99.6%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- Active
- Technical impact
- Total
Weaknesses (CWE)
- CWE-787Out-of-bounds Write
- CWE-252Unchecked Return Value