CVE-2026-107735 — SumatraPDF: `sumatrapdfrestrict.ini` never revokes any permission (fail-open policy initialization)
SumatraPDF is a multi-format reader for Windows. In 3.6.1 and earlier, InitializePolicies() starts the sumatrapdfrestrict.ini path with gPolicyRestrictions set to Perm::All and …
Published: 2026-10-08 · CVSS: 5.4 · CVSS 4.0
SumatraPDF is a multi-format reader for Windows. In 3.6.1 and earlier, InitializePolicies() starts the sumatrapdfrestrict.ini path with gPolicyRestrictions set to Perm::All and only ORs permission bits, so the INI file never revokes permissions. Deploying SumatraPDF with this INI file, including a malformed file or zero-valued permission settings, can silently bypass configured disk, network, printing, registry, clipboard, preference, and fullscreen restrictions. The -restrict command-line path works correctly and is not affected. No fixed version is available as of this review.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7