Live › vulnerability › CVE-2026-115946
XS::libbrotli versions before 1.2.1.0 bundle a brotli library whose decoder has an out-of-bounds write. A crafted compressed stream sent to a Perl module that decompresses untrusted data can corrupt memory, leak data, crash the process, or potentially run arbitrary code.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-11-01 00:46 UTC. All times on this page are UTC.
Affected builds compile a bundled brotli into static archives that dependent XS modules link against, so exposure comes through any Perl module that decompresses untrusted data with it. XS::libbrotli has no Perl interface of its own. Systems that never decompress attacker-supplied brotli data have a smaller exposure; the sources do not say which dependent modules are common.
No product ranges from the sources yet.
perl -MXS::libbrotli -e 'print $XS::libbrotli::VERSION' or the module's entry in the Perl dependency list.perl -MModule::Name in the dependency tree).1.2.1.0 or later (bundles brotli 1.2.1).Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
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.
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