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

Quick assessment

Affected
sumatrapdfreader sumatrapdf
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

SumatraPDF 是一款用于 Windows 的多格式 PDF 阅读器。在 3.6.1 及更早版本中，不受信任的文档路径和 PDF 链接目标会被插入到由 ParseTip() 函数解释为受信任提示标记的通知文本中。当用户点击被注入的链接时，ExecuteTipLink() 会执行其 CmdExec 命令，从而以当前用户权限运行攻击者指定的本地程序。除该安全公告所支持的条件外，未声称存在更广泛的影响。截至本次审查时，尚无修复版本可用。

CVSS 8.4 · High

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2026-107732

Vulnerability Information
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Vulnerability Title
SumatraPDF: Markup/command-link injection into UI notification text
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
sumatrapdfreader sumatrapdf <= 3.6.1 -

II. Public POCs for CVE-2026-107732

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III. Intelligence Information for CVE-2026-107732

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Patches & Fixes for CVE-2026-107732 (1)

Vendor Advisories for CVE-2026-107732 (1)

Same Patch Batch · sumatrapdfreader · 2026-10-08 · 11 CVEs total

CVE-2026-107734 7.1 HIGH SumatraPDF: SyncTeX Argument Injection in Inverse Search Enables Arbitrary Command Executi
CVE-2026-107802 7.1 HIGH SumatraPDF — Windows command-line argument injection in AI selection-translate
CVE-2026-107733 6.8 MEDIUM SumatraPDF: Null-pointer dereference in `CmdExec` when no document tab is open
CVE-2026-107736 6.8 MEDIUM SumatraPDF: stack buffer overflow while processing EXIF Orientation metadata
CVE-2026-107738 6.8 MEDIUM SumatraPDF: Untrusted binary record offset used without lower-bound validation
CVE-2026-107737 5.7 MEDIUM SumatraPDF CHM `its://` signed index causes an out-of-bounds object lookup
CVE-2026-107731 5.5 MEDIUM SumatraPDF: LIT parser range-validation flaws cause invalid-pointer reads and denial of se
CVE-2026-107729 5.5 MEDIUM SumatraPDF: Unsigned-to-signed hdrLen validation bypass in SumatraPDF MOBI parsing causes
CVE-2026-107730 5.5 MEDIUM SumatraPDF: Signed integer overflow in the LIT header parsing causes invalid-pointer read
CVE-2026-107735 5.4 MEDIUM SumatraPDF: `sumatrapdfrestrict.ini` never revokes any permission (fail-open policy initia

IV. Related Vulnerabilities

Same product: sumatrapdf
Same vendor: sumatrapdfreader
Same weakness: CWE-94

V. Comments for CVE-2026-107732

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