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CVE-2026-111497

Google Brotli Unchecked Return Value Vulnerability

9.8
CVSS
82.6%
EPSS (exploit prob.)
99.7%
EPSS percentile
Yes
Actively exploited
No
Ransomware use
2026-10-27
Added
▲ +27.2 pts
3-day EPSS trend

Summary

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.

Affected software

Vendor: Google  ·  Product: Brotli

Weakness types (CWE):

CWE-252CWE-787

What to do

This vulnerability appears in CISA's Known Exploited Vulnerabilities catalog, meaning it is being exploited in the wild. Prioritize patching affected systems and verify exposure across your estate.

Related vulnerabilities in Google

CVENameEPSSExploited
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CVE-2021-21224 Google Chromium V8 Type Confusion Vulnerability 84.2% Yes
CVE-2020-6418 Google Chromium V8 Type Confusion Vulnerability 78.8% Yes
CVE-2021-21220 Google Chromium V8 Improper Input Validation Vulnerability 70.4% Yes
CVE-2021-30551 Google Chromium V8 Type Confusion Vulnerability 64.7% Yes
CVE-2020-15999 Google Chrome FreeType Heap Buffer Overflow Vulnerability 63.9% Yes
CVE-2021-30632 Google Chromium V8 Out-of-Bounds Write Vulnerability 63.2% Yes

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Sources: CISA KEV catalog · NVD · FIRST EPSS

This product uses the NVD API but is not endorsed or certified by the NVD.

All information is aggregated from public sources for awareness only and does not constitute an accusation or a security assessment. No personal data or credentials are published.