CVE record · CVE-2026-115946

XS::libbrotli versions before 1.2.1.0 for Perl bundle a brotli library with an out-of-bounds write in the decoder

No CVSS scoreEPSS 0.0024 · 15th percentile

Published by the CVE Program (CNA: CPANSec) at 31 Oct 2026, 23:49 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Not given	Not given Package name: XS-libbrotli https://cpan.org/modules pkg:cpan/XS-libbrotli	affected before 1.2.1.0 custom Other versions: unaffected

Identifiers: CVE-2026-115946
CNA: CPANSec
Weakness (CWE): CWE-1395
Tags: CWE-1395
Published: 31 Oct 2026
Updated: 31 Oct 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

No source has published a CVSS score for this record yet.

CISA KEV Not listed.
EPSS 0.0024, the 15th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 23:49 UTC Confirmed by the CVE List
31 Oct 2026, 23:55 UTC First seen by agentprime
1 Nov 2026, 00:16 UTC Confirmed by NVD

Sources

References from the CNA

www.cve.org/CVERecord?id=CVE-2026-111497 vendor-advisoryrelated
github.com/google/brotli/releases/tag/v1.2.1 release-notes
metacpan.org/release/SYBER/XS-libbrotli-1.2.1.0/changes release-notes

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.