PatchSiren

sumatrapdfreader CVE debriefs

These pages are published after PatchSiren validates generated defensive summaries against stored public CVE and source evidence.

MEDIUM sumatrapdfreader CVE published 2026-08-20

CVE-2026-55586

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-20T17:18:27.723Z and has not been modified since then. This vulnerability affects SumatraPDF reader, specifically versions 3.6.1 and earlier. A crafted CHM file can cause heap memory corruption in the parser process by supplying malformed LZX Huffman code lengths. The vulnerability occurs when the f [truncated]