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CVE-2026-111497

CriticalCVSS 9.2 / 10
Published Oct 22, 2026·Last modified Oct 27, 2026
Affected Components(36)
google/brotli
1.0.7
andybalholm/brotli
1.1.0
google/brotli
go/cbrotli/v1.1.0.bcr.1
1 / 12
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.

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Risk Scores
Base Score
9.2

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability.

Threat Intelligence
9.2

Active exploitation in the wild has been confirmed. Immediate patching or mitigation is required.

EPSS
55.48%

The exploit probability is high. The vulnerability is very likely to be exploited in the next 30 days.

Exploit
Attacked

This vulnerability is actively being exploited in the wild. Please take immediate action to mitigate the risk.

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