XS::libbrotli versions before 1.2.1.0 for Perl bundle a brotli library with an out-of-bounds write in the decoder. Affected versions compile a bundled brotli into static archives that dependent XS modules link against at build time, rather than using the system library. The bundled copy, 1.0.7 or 1.1.0 across the range, carries the decoder out-of-bounds write described in CVE-2026-111497. Version 1.2.1.0 updates it to brotli 1.2.1. XS::libbrotli has no Perl interface, so the decoder is reached through any dependent module that decompresses untrusted data with it. An attacker supplying a crafted brotli stream can corrupt decoder state, disclose memory, crash the process, or potentially execute arbitrary code. Upgrading the system brotli does not remediate this.
History

Sat, 07 Nov 2026 07:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 03 Nov 2026 17:00:00 +0000

Type Values Removed Values Added
First Time appeared Perl
Perl xs::libbrotli
Vendors & Products Perl
Perl xs::libbrotli

Sun, 01 Nov 2026 00:00:00 +0000

Type Values Removed Values Added
Description XS::libbrotli versions before 1.2.1.0 for Perl bundle a brotli library with an out-of-bounds write in the decoder. Affected versions compile a bundled brotli into static archives that dependent XS modules link against at build time, rather than using the system library. The bundled copy, 1.0.7 or 1.1.0 across the range, carries the decoder out-of-bounds write described in CVE-2026-111497. Version 1.2.1.0 updates it to brotli 1.2.1. XS::libbrotli has no Perl interface, so the decoder is reached through any dependent module that decompresses untrusted data with it. An attacker supplying a crafted brotli stream can corrupt decoder state, disclose memory, crash the process, or potentially execute arbitrary code. Upgrading the system brotli does not remediate this.
Title XS::libbrotli versions before 1.2.1.0 for Perl bundle a brotli library with an out-of-bounds write in the decoder
Weaknesses CWE-1395
References

cve-icon MITRE

Status: PUBLISHED

Assigner: CPANSec

Published: 2026-10-31T23:49:36.583Z

Updated: 2026-11-06T13:45:18.524Z

Reserved: 2026-10-23T23:40:26.063Z

Link: CVE-2026-115946

cve-icon Vulnrichment

Updated: 2026-11-06T13:45:14.510Z

cve-icon NVD

Status : Deferred

Published: 2026-11-01T00:16:34.437

Modified: 2026-11-06T14:17:06.580

Link: CVE-2026-115946

cve-icon Redhat

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