KEV · Actively exploited
CVE-2026-111497
CVE-2026-111497 is actively exploited (CISA KEV catalog) : critical severity (CVSS 9.8), 0 tracked apps concerned, none still exposed on their current version.
- Severity (CVSS)
- 9.8
- Exploitation
- Confirmed
- Tracked apps
- 0
- Still exposed
- 0
NVD scale
CISA KEV · EPSS predicts 82.6 %
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.
Show raw CVSS vector
CISA Known Exploited Vulnerability
- Added to KEV
- 2026-10-27
- Remediation deadline
- 2026-11-10
- 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 each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
- Ransomware
- Unknown (not documented by CISA)
OS versions that fix this CVE
This CVE is resolved by the following OS security releases. Update the OS to at least the listed version.
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