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: < 1% Very Low
KEV: No
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

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

Fri, 23 Oct 2026 14:30:00 +0000


Fri, 23 Oct 2026 13:30:00 +0000


Fri, 23 Oct 2026 12:30:00 +0000

Type Values Removed Values Added
First Time appeared Redhat
Redhat hummingbird
CPEs cpe:/a:redhat:hummingbird:1
Vendors & Products Redhat
Redhat hummingbird
References
Metrics threat_severity

None

cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}

threat_severity

Important


Fri, 23 Oct 2026 09:00:00 +0000

Type Values Removed Values Added
First Time appeared Nodejs
Nodejs nodejs
Vendors & Products Nodejs
Nodejs nodejs

Fri, 23 Oct 2026 00:45:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


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: 2026-10-23T14:25:46.551Z

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

Link: CVE-2026-111497

cve-icon Vulnrichment

Updated: 2026-10-22T19:00:18.440Z

cve-icon NVD

Status : Awaiting Analysis

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

Modified: 2026-10-23T14:17:31.247

Link: CVE-2026-111497

cve-icon Redhat

Severity : Important

Publid Date: 2026-10-22T13:35:41Z

Links: CVE-2026-111497 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-23T08:42:05Z

Weaknesses