CVE-2026-34621
Actively exploited (CISA KEV) - patch before 2026-04-27
Adobe Acrobat and Reader contain a prototype pollution vulnerability that allows for arbitrary code execution.
Actively exploited in the wild and listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. No distribution fix is listed yet; apply vendor mitigations and monitor.
Recommended action: No fix is published yet for an actively-exploited flaw. Apply vendor mitigations, restrict exposure, and watch for a patch.
Severity metrics
CVSS 3.1 : 8.6 HIGH
Vector: AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Affected & fixed versions by distribution
Versions are the native distribution strings (backport-aware): RHEL/Debian/SUSE backport fixes, so compare with the distro version comparator (dpkg / rpm / vercmp), not the upstream version.
No affected package in the tracked watchlist yet (Debian, Ubuntu, Arch, SUSE, Red Hat...). Triage may still be pending.