All vulnerabilities
CVE-2026-107735GHSA-crhm-w5qr-wjj4

SumatraPDF: `sumatrapdfrestrict.ini` never revokes any permission (fail-open policy initialization)

sumatrapdfreader sumatrapdf
Open in ThreatlineRecord JSON
CVSS
5.4Medium
ExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 9 Oct 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)0.11%Chance of exploitation activity in the next 30 days, higher than 1% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Published8 Oct 2026Updated 9 Oct 2026CVE List

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Description

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.

Text from CVE List

Affected versions 2

  • sumatrapdfaffected: <= 3.6.1CVE List
  • sumatrapdf3.6.1GitHub

References 2