CVE-2026-107732

The multi-format reader SumatraPDF for Windows (version 3.6.1 and earlier ) is vulnerable to markup/command-link injection . The issue occurs because untrusted document paths and PDF link targets are interpolated into notification text, which the ParseTip() function interprets as trusted tip mark...

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

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...

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

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...

CVE-2026-107732

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...

CVE-2026-107731 SumatraPDF: LIT parser range-validation flaws cause invalid-pointer reads and denial of service

SumatraPDF is a multi-format reader for Windows. In 3.7.0.22298, four independently reachable range-validation variants in src/LitDoc.cpp allow file-controlled offsets and sizes to overflow, narrow to negative values, or wrap before incomplete bounds checks. The affected calculations include...

CVE-2026-107731 SumatraPDF: LIT parser range-validation flaws cause invalid-pointer reads and denial of service

SumatraPDF is a multi-format reader for Windows. In 3.7.0.22298, four independently reachable range-validation variants in src/LitDoc.cpp allow file-controlled offsets and sizes to overflow, narrow to negative values, or wrap before incomplete bounds checks. The affected calculations include...

CVE-2026-107731

The multi-format reader SumatraPDF version 3.7.0.22298 for Windows contains four independently reachable range-validation flaws in src/LitDoc.cpp . These flaws allow file-controlled offsets and sizes to overflow, narrow to negative values, or wrap before incomplete bounds checks. Specifically, th...

CVE-2026-107730 SumatraPDF: Signed integer overflow in the LIT header parsing causes invalid-pointer read

SumatraPDF is a multi-format reader for Windows. In 3.7.0.22298, LitParseHeader in src/LitDoc.cpp computes the attacker-controlled hdrLen + nPieces 16 section offset using signed 32-bit arithmetic without validating the complete result. When the component values make that aggregate calculation...

CVE-2026-107730 SumatraPDF: Signed integer overflow in the LIT header parsing causes invalid-pointer read

SumatraPDF is a multi-format reader for Windows. In 3.7.0.22298, LitParseHeader in src/LitDoc.cpp computes the attacker-controlled hdrLen + nPieces 16 section offset using signed 32-bit arithmetic without validating the complete result. When the component values make that aggregate calculation...

CVE-2026-107730

The multi-format reader SumatraPDF (version 3.7.0.22298 ) contains a signed integer overflow vulnerability in the LitParseHeader() function located in src/LitDoc.cpp . The issue occurs because the software uses signed 32-bit arithmetic to compute the section offset (hdrLen + nPieces * 16) without...

CVE-2026-107729 SumatraPDF: Unsigned-to-signed hdrLen validation bypass in SumatraPDF MOBI parsing causes out-of-bounds read

SumatraPDF is a multi-format reader for Windows. In 3.7.0.22298, src/MobiDoc.cpp narrows the untrusted unsigned mobiHdr.hdrLen field to a signed integer for validation; values above INTMAX become negative and bypass the upper-bound check. When the EXTH flag is set, the original unsigned value is...

CVE-2026-107729

The multi-format reader SumatraPDF (version 3.7.0.22298) is vulnerable to an out-of-bounds read in src/MobiDoc.cpp during MOBI parsing. The root cause is an unsigned-to-signed conversion where the mobiHdr.hdrLen field is narrowed to a signed integer for validation. Values exceeding INT_MAX become...

CVE-2026-107729 SumatraPDF: Unsigned-to-signed hdrLen validation bypass in SumatraPDF MOBI parsing causes out-of-bounds read

SumatraPDF is a multi-format reader for Windows. In 3.7.0.22298, src/MobiDoc.cpp narrows the untrusted unsigned mobiHdr.hdrLen field to a signed integer for validation; values above INTMAX become negative and bypass the upper-bound check. When the EXTH flag is set, the original unsigned value is...

PT-2026-108307

Name of the Vulnerable Software and Affected Versions SumatraPDF versions prior to 3.6.2 Description In the src/SelectionTranslate.cpp file, selected or pasted translation text is embedded in quoted Windows command lines using incomplete quote-only escaping. This issue affects the...

CVE-2026-107738: Out-of-bounds Read

SumatraPDF is a multi-format reader for Windows. In 3.6.1 and earlier, ChmFile::GetCharZ narrows file-controlled unsigned string offsets from /WINDOWS and /IVB to signed integers without a lower-bound check. An offset that becomes negative can make the function read before the /STRINGS buffer,...

CVE-2026-107736: Stack-based Buffer Overflow

SumatraPDF is a multi-format reader for Windows. In 3.6.1 and earlier, MaybeFlipBitmap asks GDI+ to read the attacker-controlled PropertyTagOrientation size through GetPropertyItem while supplying only a fixed 64-byte buf on the stack. Opening a crafted TIFF with enough EXIF Orientation values ca...

CVE-2026-107734: Improper Input Validation

SumatraPDF is a multi-format reader for Windows. In 3.5.2 and earlier, an attacker-controlled SyncTeX source filename is substituted for the %f placeholder in an external editor command line without safe Windows argument quoting, and the resulting command line is passed to CreateProcessW. A user...

CVE-2026-107733: NULL Pointer Dereference

SumatraPDF is a multi-format reader for Windows. In 3.6.1 and earlier, FrameOnCommand handles CmdExec by passing a null current-tab pointer to RunWithExe, which dereferences WindowTab::filePath. A local process in the same interactive Windows session, at an integrity level greater than or equal t...

CVE-2026-107729: Out-of-bounds Read

SumatraPDF is a multi-format reader for Windows. In 3.7.0.22298, src/MobiDoc.cpp narrows the untrusted unsigned mobiHdr.hdrLen field to a signed integer for validation; values above INTMAX become negative and bypass the upper-bound check. When the EXTH flag is set, the original unsigned value is...

CVE-2026-107802: Improper Neutralization of Argument Delimiters in a Command

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...