CVE-2026-107735
SumatraPDF: `sumatrapdfrestrict.ini` never revokes any permission (fail-open policy initialization)
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-636 |
| Vendor | sumatrapdfreader |
| Product | sumatrapdf |
| Published | Oct 8, 2026 |
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Affected Versions
sumatrapdfreader / sumatrapdf
<= 3.6.1