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  4. CVE 2026 107732 sumatrapdf markupcommand link injection into ui
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Back to active CVEs
High · CVSS 8.4CVE-2026-107732

SumatraPDF: Markup/command-link injection into UI notification textCVE-2026-107732

Answer in brief

CVE-2026-107732 records a High severity (CVSS 8.4) vulnerability in SumatraPDF: Markup/command-link injection into UI notification text. 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 8, 2026First seen by HOL Oct 8, 2026Material review Oct 8, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.4
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 8.4. 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, untrusted document paths and PDF link targets are interpolated into notification text that ParseTip() interprets as trusted tip markup. When a user clicks an injected link, ExecuteTipLink() dispatches its CmdExec command and can execute an attacker-selected local program in the user's context. No broader impact is claimed beyond the advisory-supported conditions. 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: 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
  • SumatraPDF: `sumatrapdfrestrict.ini` never revokes any permission (fail-open policy initialization)Same sumatrapdfreader/sumatrapdf package

Record context

Vulnerability class
RCE
EPSS
Not reported
CWE IDs
CWE-94
Source
CVE List V5
Source checked
Oct 8, 2026
References
2 linked sources
Open source record