CVE detail
CVE-2026-111497: Google Brotli Unchecked Return Value Vulnerability
Source: CISA Known Exploited Vulnerabilities catalog · back to feed
Vendor / product
Google · Brotli
- Date added (KEV)
- Oct 27, 2026
- CISA due date
- Nov 10, 2026
- Ransomware campaign use
- Unknown
Required action
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.
Vendor fix: Vendor advisory
Scorifya interpretation
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Plain English
Technical detail
From CISA
Google Brotli contains an unchecked return value vulnerability that 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.
This vulnerability affects an open-source component, third-party library, protocol, or proprietary implementation that could be used by different products. For more information, please see: https://github.com/google/brotli/releases/tag/v1.2.1 ; ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-111497
See what attackers can see on your domain
This vulnerability is on CISA's Known Exploited Vulnerabilities list, so it is being exploited in the wild right now. Scorifya can't test for Google directly, but in about 30 seconds it shows what your own domain exposes publicly across TLS, security headers, DNS, and cookies: the surface attackers probe first.
SOC 2 compliance
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See Scorifya Controls →References
- https://github.com/andybalholm/brotli/releases/tag/v1.2.7
- 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
- http://www.openwall.com/lists/oss-security/2026/10/23/25
- 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
- http://www.openwall.com/lists/oss-security/2026/10/26/16
- https://broccoli2shell.com/
- https://github.com/advisories/GHSA-9v8h-qqgm-4m35
- https://github.com/dotnet/announcements/issues/494
- https://github.com/google/brotli/releases/tag/v1.0.10
- https://github.com/google/brotli/releases/tag/v1.1.1
- https://github.com/google/brotli/releases/tag/v1.2.1
- https://lists.debian.org/debian-lts-announce/2026/10/msg00049.html
- https://patchtheplanet.org/brotli
- https://www.aikido.dev/blog/node2shell-nodejs-brotli-rce-cve-2026-111497
- https://ellio.tech/en/blog/node2shell-cve-2026-111497-rce-on-stock-nodejs-builds/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-111497
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