Google Brotli Unchecked Return Value Vulnerability
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.
CISA 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
Read at NIST National Vulnerability Database (CVE API 2.0)
- Vendor
- Product
- Brotli
- EPSS
- 0.83 (p100)
- CISA KEV
- added 27 Oct 2026, due 10 Nov 2026 (9d)
- Exploitation
- observed in the wild
- Fix
- available
- Weakness
- CWE-252, CWE-787
Why it ranks 72 (Critical)
- CISA KEV listed, remediation due 2026-11-10
- EPSS 0.83 (high probability of exploitation)
- Covered by 21 independent sources
- Fix available
- Recency: items published within 24 hours gain 15, within 72 hours 6, within 7 days 2.
Links
- NIST National Vulnerability Database (CVE API 2.0) (nvd.nist.gov)
- CVE-2026-111497 on this site · NVD · CVE.org · Vulnpedia · KEV
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