TI-2026-69819 Aliases CVE-2026-107802

Argument injection in SumatraPDF selection translation on Windows

HIGH 66CWE-88Published 2026-10-08 · Updated 2026-10-09

Key facts

Attack vector: Local
Privileges required: None
User interaction: Active
Attack complexity: Low
Attack requirements: Present
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-88.

Summary

SumatraPDF 3.6.1 and earlier embeds selected or pasted text in quoted Windows command lines using incomplete quote-only escaping, an argument injection flaw (CWE-88). When the Grok, Claude or Codex agentic CLI backend is installed and used, attacker-controlled text can inject flags that change the model, working directory, approval or sandbox settings, and a user must translate that text for this to occur.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00196 9th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
sumatrapdfreader	sumatrapdf	up to 3.6.1	—	No fix listed	CNA

sumatrapdf Vendorsumatrapdfreader Affected up to 3.6.1 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:sumatrapdfreader:sumatrapdf::::::::	—	—	sumatrapdfreader

cpe:2.3:a:sumatrapdfreader:sumatrapdf:*:*:*:*:*:*:*:* Versions — — ·sumatrapdfreader

Remediation

The sources list no fixed version for SumatraPDF.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Timeline

2026-10-09 Threatist record created from CVE-2026-107802
2026-10-10 CISA SSVC decision points changed
2026-10-10 Priority changed: MEDIUM → HIGH

References

Other 2

TI-2026-18936 SumatraPDF has an Untrusted Search Path in sumatrapdf/src/AppTools.cpp CVSS 3.1HIGH 8.6
TI-2025-35489 A null pointer dereference vulnerability was discovered in SumatraPDF 3.5.2 during the… CVSS 3.1HIGH 7.3
TI-2012-04514 SumatraPDF 2.1.1/MuPDF 1.0 allows remote attackers to cause an Integer Overflow in the… CVSS 3.1HIGH 7.8
TI-2026-69814 SumatraPDF: SyncTeX Argument Injection in Inverse Search Enables Arbitrary Command Execution via External Editors CVSS 4.0HIGH 7.1
TI-2026-69813 Null pointer dereference in SumatraPDF CmdExec crashes the reader CVSS 4.0MEDIUM 6.8
TI-2026-21058 SumatraPDF: Heap out-of-bounds read in MOBI header parser. CVSS 4.0MEDIUM 6.8

See all 26 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences