Vulnerability · Published Oct 8, 2026 · Assigned by GitHub_M

CVE-2026-107802SumatraPDF — Windows command-line argument injection in AI selection-translate

High 7.1

In plain English

A high-severity argument injection in sumatrapdf from sumatrapdfreader. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities).

Severity (CVSS 4.0)7.1High

Exploit odds (30 days)0.2%top 90.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

SumatraPDF is a multi-format reader for Windows. In 3.6.1 and earlier, src/SelectionTranslate.cpp embeds selected or pasted translation text in quoted Windows command lines using incomplete quote-only escaping. The affected BuildGrokTranslateCmdLineTemp(), BuildClaudeTranslateCmdLineTemp(), and BuildCodexTranslateCmdLineTemp() functions can allow attacker-controlled text to inject model, working-directory, approval, or sandbox-bypass flags when the corresponding agentic CLI backend is installed and used. 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-88 · Vector: CVSS:4.0/AV:L/AC:L/AT:P/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-xvxg-cwmx-hr7j x_refsource_CONFIRM
https://github.com/sumatrapdfreader/sumatrapdf/commit/6b88a751ab34a28bafca3bdd635aaa2f4c1e06b6 x_refsource_MISC