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  4. CVE 2026 107735 sumatrapdf sumatrapdfrestrictini never revokes
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Back to active CVEs
Medium · CVSS 5.4CVE-2026-107735

SumatraPDF: `sumatrapdfrestrict.ini` never revokes any permission (fail-open policy initialization)CVE-2026-107735

Answer in brief

CVE-2026-107735 records a Medium severity (CVSS 5.4) vulnerability in SumatraPDF: `sumatrapdfrestrict.ini` never revokes any permission (fail-open policy initialization). The current sources do not mark it as known exploited. The current feed maps sumatrapdfreader/sumatrapdf (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 8, 2026Updated Oct 8, 2026Source checked Oct 9, 2026First seen by HOL Oct 8, 2026Material review Oct 8, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 5.4
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 5.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps sumatrapdfreader/sumatrapdf (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
sumatrapdfreader/sumatrapdfgeneric<=3.6.1= 3.6.1

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for sumatrapdfreader/sumatrapdf.
  2. 2Review the reported fix. Update sumatrapdfreader/sumatrapdf to = 3.6.1 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 8, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 8, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 8, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • SumatraPDF: Unsigned-to-signed hdrLen validation bypass in SumatraPDF MOBI parsing causes out-of-bounds readSame sumatrapdfreader/sumatrapdf package
  • SumatraPDF: Signed integer overflow in the LIT header parsing causes invalid-pointer readSame sumatrapdfreader/sumatrapdf package
  • SumatraPDF: LIT parser range-validation flaws cause invalid-pointer reads and denial of serviceSame sumatrapdfreader/sumatrapdf package
  • SumatraPDF: Markup/command-link injection into UI notification textSame sumatrapdfreader/sumatrapdf package
  • SumatraPDF: Null-pointer dereference in `CmdExec` when no document tab is openSame sumatrapdfreader/sumatrapdf package
  • SumatraPDF: SyncTeX Argument Injection in Inverse Search Enables Arbitrary Command Execution via External EditorsSame sumatrapdfreader/sumatrapdf package

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-636
Source
CVE List V5
Source checked
Oct 9, 2026
References
2 linked sources
Open source record