CVE-2026-111497

Modified Modified - Updated After Analysis

Buffer Overflow in Google Brotli Decoder

Publication date: 2026-10-22

Last updated on: 2026-10-30

Assigner: Google Inc.

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.

CVSS Scores

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Meta Information

Published

2026-10-22

Last Modified

2026-10-30

Generated

2026-11-03

AI Q&A

2026-10-23

EPSS Evaluated

2026-11-01

NVD

CVE-2026-111497

Affected Vendors & Products

Vendor	Product	Version / Range
siemens	ruggedcom_ape1808_firmware	*
siemens	industrial_edge_cloud_connector_configurator	*
siemens	industrial_edge_hub	*
siemens	common_configurator	*
siemens	edge_opc_ua_server_configurator	*
siemens	flow_creator_configurator	*
siemens	industrial_edge_databus_configurator	*
siemens	industrial_edge_management_cloud	*
siemens	data_flow_monitoring	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-787	The product writes data past the end, or before the beginning, of the intended buffer.
CWE-252	The product does not check the return value from a method or function, which can prevent it from detecting unexpected states and conditions.

Attack-Flow Graph

Executive Summary

This is a buffer overflow vulnerability in the Brotli decoder affecting versions 1.0.3 through 1.2.0. A remote unauthenticated attacker can exploit it by sending a specially crafted Brotli-compressed stream to corrupt adjacent memory, disclose sensitive data, cause denial of service, or potentially execute arbitrary code.

Detection Guidance

To detect this vulnerability, check the installed version of Brotli or Node.js. For Node.js, run: node -v and compare it against patched versions (22.23.4, 24.22.1, 26.12.1). For Brotli, check library versions with pkg-config --modversion libbrotli or similar commands depending on your system.

Impact Analysis

The impact includes potential data breaches from memory disclosure, system crashes from denial of service, or remote code execution allowing full system compromise. Users relying on vulnerable Brotli versions in applications or libraries are at risk if they process untrusted compressed data.

Compliance Impact

This vulnerability could lead to unauthorized memory disclosure or remote code execution, which may result in exposure of sensitive data. For GDPR, this could violate principles of data protection and confidentiality. For HIPAA, it may compromise protected health information if exploited.

Mitigation Strategies

Update all Brotli libraries or binaries from versions 1.0.3 through 1.2.0 to the latest available version (1.0.10, 1.1.1, or 1.2.1).

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EPSS Chart

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