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.
Published: 2026-10-22
Score: 9.2 Critical
EPSS: n/a
KEV: No
AI Analysis

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Remediation

Vendor Solution

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.

Tracking

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Advisories

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History

Thu, 22 Oct 2026 14:30:00 +0000

Type Values Removed Values Added
First Time appeared Google
Google brotli
Vendors & Products Google
Google brotli

Thu, 22 Oct 2026 13:45:00 +0000

Type Values Removed Values Added
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.
Title Out-of-Bounds Write in Google Brotli Decoder
Weaknesses CWE-252
CWE-787
References
Metrics cvssV4_0

{'score': 9.2, 'vector': '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Google

Published:

Updated: 2026-10-22T13:35:41.975Z

Reserved: 2026-10-16T09:58:17.790Z

Link: CVE-2026-111497

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-22T14:17:37.190

Modified: 2026-10-22T14:17:37.190

Link: CVE-2026-111497

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-22T14:15:06Z

Weaknesses