CVE-2026-111497
Published:October 22, 2026
Updated:October 24, 2026
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.
Affected Packages
brotli (CONAN):
Affected version(s) =1.1.0 <1.1.1Fix Suggestion:
Update to version 1.1.1brotli (CONAN):
Affected version(s) =1.2.0 <1.2.1Fix Suggestion:
Update to version 1.2.1brotli (CONAN):
Affected version(s) >=1.0.7 <1.0.10Fix Suggestion:
Update to version 1.0.10brotli (CONDA):
Affected version(s) =1.2.0 <1.2.1Fix Suggestion:
Update to version 1.2.1brotli-python (CONDA):
Affected version(s) =1.2.0 <1.2.1Fix Suggestion:
Update to version 1.2.1nodejs (CONDA):
Affected version(s) >=22.3.0 <22.23.4Fix Suggestion:
Update to version 22.23.4libbrotlidec (CONDA):
Affected version(s) =1.2.0 <1.2.1Fix Suggestion:
Update to version 1.2.1https://github.com/google/brotli.git (GITHUB):
Affected version(s) >=v1.0.3 <v1.0.10Fix Suggestion:
Update to version v1.0.10https://github.com/google/brotli.git (GITHUB):
Affected version(s) >=v1.2.0rc1 <v1.2.1Fix Suggestion:
Update to version v1.2.1https://github.com/nodejs/node.git (GITHUB):
Affected version(s) >=v22.0.0 <v22.23.4Fix Suggestion:
Update to version v22.23.4https://github.com/nodejs/node.git (GITHUB):
Affected version(s) >=v24.0.0 <v24.22.1Fix Suggestion:
Update to version v24.22.1https://github.com/nodejs/node.git (GITHUB):
Affected version(s) >=v26.0.0 <v26.12.1Fix Suggestion:
Update to version v26.12.1https://github.com/google/brotli.git (GITHUB):
Affected version(s) >=v1.1.0rc <v1.1.1Fix Suggestion:
Update to version v1.1.1brotli (PYTHON):
Affected version(s) =1.2.0 <1.2.1Fix Suggestion:
Update to version 1.2.1Related Resources (14)
Do you need more information?
Contact UsCVSS v4
Base Score:
9.2
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
9.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
EPSS
Base Score:
0.48