Vulnerability · Published Oct 8, 2026 · Assigned by GitHub_M

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

High 8.4

In plain English

A high-severity code injection in sumatrapdf from sumatrapdfreader. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities).

Severity (CVSS 4.0)8.4High

Exploit odds (30 days)0.1%top 97.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
sumatrapdfreader	sumatrapdf	<= 3.6.1

Weakness: CWE-94 · Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

References

https://github.com/sumatrapdfreader/sumatrapdf/security/advisories/GHSA-2wv2-qm2f-vmxh x_refsource_CONFIRM
https://github.com/sumatrapdfreader/sumatrapdf/commit/8b680387ed69e3504ef296e09d6e032f81076af8 x_refsource_MISC