CVE-2026-25961-SumatraPDF-3.5.0---3.5.2-RCE

SumatraPDF Insecure Update PoC CVE-2026-25961 – Remote Code Execution via Malicious Update Server Author: Mohammed Idrees Banyamer Date: February 2026 CVE: CVE-2026-25961 GHSA: GHSA-xpm2-rr5m-x96q CVSS v3.1: 7.5 High AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Affected versions: SumatraPDF 3.5.0 – 3.5.2...

CVE-2023-33802

CVE-2023-33802 SumatraPDF 3.4.6 -32-bit Denial Of Services DoS Description In this bug, a crash is addressed which is manifested when we open two large size text files first.txt & second.txt as input to SumatraPDF 32 bit. Run the following command, or you can manually open the both files in...

CVE-2026-115758

SumatraPDF is a multi-format reader for Windows. In version 3.6.1 and earlier, HttpGet in src/base/Httpwin.cpp unconditionally passes INTERNETFLAGIGNORECERTCNINVALID to WinINet, disabling hostname matching for HTTPS update metadata and crash-symbol requests while retaining certificate-chain...

CVE-2026-115758

In SumatraPDF version 3.6.1 and earlier for Windows, the HttpGet() function in src/base/Http_win.cpp incorrectly passes the INTERNET_FLAG_IGNORE_CERT_CN_INVALID flag to WinINet . This configuration disables hostname matching for HTTPS update metadata and crash-symbol requests while maintaining ce...

CVE-2026-115758 SumatraPDF: TLS hostname validation disabled in `HttpGet()`

SumatraPDF is a multi-format reader for Windows. In version 3.6.1 and earlier, HttpGet in src/base/Httpwin.cpp unconditionally passes INTERNETFLAGIGNORECERTCNINVALID to WinINet, disabling hostname matching for HTTPS update metadata and crash-symbol requests while retaining certificate-chain...

CVE-2026-115758 SumatraPDF: TLS hostname validation disabled in `HttpGet()`

SumatraPDF is a multi-format reader for Windows. In version 3.6.1 and earlier, HttpGet in src/base/Httpwin.cpp unconditionally passes INTERNETFLAGIGNORECERTCNINVALID to WinINet, disabling hostname matching for HTTPS update metadata and crash-symbol requests while retaining certificate-chain...

PT-2026-137140

SumatraPDF is a multi-format reader for Windows. In version 3.6.1 and earlier, HttpGet in src/base/Http win.cpp unconditionally passes INTERNET FLAG IGNORE CERT CN INVALID to WinINet, disabling hostname matching for HTTPS update metadata and crash-symbol requests while retaining certificate-chain...

CVE-2026-107802

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...

CVE-2026-107738

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-2026-107737

SumatraPDF is a multi-format reader for Windows. In 3.6.1 and earlier, and in pre-release 3.7.0.20369 when WebView2 is absent or cannot initialize, ParseProtoUrl accepts the signed host component of an its:// URL and FindHtmlWindowById uses it directly as an index into gHtmlWindows. Opening a...

CVE-2026-107736

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

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

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-2026-107735

SumatraPDF is a multi-format reader for Windows. In 3.6.1 and earlier, InitializePolicies starts the sumatrapdfrestrict.ini path with gPolicyRestrictions set to Perm::All and only ORs permission bits, so the INI file never revokes permissions. Deploying SumatraPDF with this INI file, including a...

CVE-2026-107730

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-2026-107731

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-2026-107729

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-2026-107732

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

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...

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

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...