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… (CVE-2026-111497)
Description
A buffer overflow vulnerability exists in the Brotli decoder component (c/dec/decode.c) in Google Brotli versions 1.0.3 through 1.2.0 on all platforms. This flaw allows a remote unauthenticated attacker to corrupt adjacent decoder state memory, potentially leading to sensitive memory disclosure, denial of service, or arbitrary code execution. Users should update affected Brotli libraries or binaries to versions 1.0.10, 1.1.1, or 1.2.1 to remediate this issue.
CVSS v4.0
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability is a buffer overflow in the Brotli decoder implementation (specifically in c/dec/decode.c) affecting Google Brotli versions 1.0.3 through 1.2.0 across all platforms. Exploitation requires a crafted Brotli-compressed stream and can result in corruption of adjacent decoder state memory. This memory corruption can lead to disclosure of sensitive information, denial of service conditions, or potentially arbitrary code execution by a remote unauthenticated attacker. The issue is addressed by updating to fixed versions 1.0.10, 1.1.1, or 1.2.1.
Potential Impact
Successful exploitation can cause memory corruption that may disclose sensitive memory contents, cause denial of service, or enable arbitrary code execution. The vulnerability is remotely exploitable without authentication, increasing its risk profile.
Mitigation Recommendations
Users should update any Brotli libraries or binaries from versions 1.0.3 through 1.2.0 to the fixed versions 1.0.10, 1.1.1, or 1.2.1. No other mitigation or workaround is indicated.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-9v8h-qqgm-4m35
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-111497"]
- Database Specific Severity
- CRITICAL
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ada44c14d27ba8daa6a4549
Added to database: 10/22/2026, 17:15:45 UTC
Last enriched: 10/22/2026, 17:18:25 UTC
Last updated: 10/23/2026, 04:15:13 UTC
Views: 5
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