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6 vulnerabilities found for sumatrapdf by sumatrapdfreader

CVE-2026-55586 (GCVE-0-2026-55586)
Vulnerability from cvelistv5
Published
2026-08-20 16:35
Modified
2026-08-21 21:47
Severity ?
6.6 (Medium) - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L
CWE
  • CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
  • CWE-787 - Out-of-bounds Write
Summary
SumatraPDF is a multi-format reader for Windows. In 3.6.1 and earlier, a crafted CHM file can supply malformed LZX Huffman code lengths to make_decode_table in ext/CHMLib/lzx.c. In the long-code branch, the function writes new internal nodes through next_symbol before validating that the canonical Huffman table has overflowed. The PRETREE case can write beyond the 104-entry PRETREE_table into adjacent heap state in struct LZXstate when reached through chm_open, chm_retrieve_object, LZXdecompress, and BUILD_TABLE. This produces heap memory corruption in the parser process, while arbitrary code execution has not been demonstrated. No fixed version is available as of this review.
References
Impacted products
Vendor Product Version
sumatrapdfreader sumatrapdf Version: <= 3.6.1rel
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CVE-2026-25961 (GCVE-0-2026-25961)
Vulnerability from cvelistv5
Published
2026-02-09 21:34
Modified
2026-02-10 15:57
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
  • CWE-295 - Improper Certificate Validation
  • CWE-494 - Download of Code Without Integrity Check
Summary
SumatraPDF is a multi-format reader for Windows. In 3.5.0 through 3.5.2, SumatraPDF's update mechanism disables TLS hostname verification (INTERNET_FLAG_IGNORE_CERT_CN_INVALID) and executes installers without signature checks. A network attacker with any valid TLS certificate (e.g., Let's Encrypt) can intercept the update check request, inject a malicious installer URL, and achieve arbitrary code execution.
References
Impacted products
Vendor Product Version
sumatrapdfreader sumatrapdf Version: >= 3.5.0, <= 3.5.2
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CVE-2026-25920 (GCVE-0-2026-25920)
Vulnerability from cvelistv5
Published
2026-02-09 21:32
Modified
2026-02-11 19:58
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CWE
Summary
SumatraPDF is a multi-format reader for Windows. In 3.5.2 and earlier, a heap out-of-bounds read vulnerability exists in SumatraPDF's MOBI HuffDic decompressor. The bounds check in AddCdicData() only validates half the range that DecodeOne() actually accesses. Opening a crafted .mobi file can read nearly (1 << codeLength) bytes beyond the CDIC dictionary buffer, leading to a crash.
References
Impacted products
Vendor Product Version
sumatrapdfreader sumatrapdf Version: <= 3.5.2
 Create a notification for this product.
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CVE-2026-25880 (GCVE-0-2026-25880)
Vulnerability from cvelistv5
Published
2026-02-09 21:10
Modified
2026-02-10 15:58
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
Summary
SumatraPDF is a multi-format reader for Windows. In 3.5.2 and earlier, the PDF reader allows execution of a malicious binary (explorer.exe) located in the same directory as the opened PDF when the user clicks File → “Show in folder”. This behavior leads to arbitrary code execution on the victim’s system with the privileges of the current user, without any warning or user interaction beyond the menu click.
References
Impacted products
Vendor Product Version
sumatrapdfreader sumatrapdf Version: <= 3.5.2
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CVE-2026-23951 (GCVE-0-2026-23951)
Vulnerability from cvelistv5
Published
2026-01-22 00:17
Modified
2026-01-22 21:44
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CWE
  • CWE-125 - Out-of-bounds Read
  • CWE-191 - Integer Underflow (Wrap or Wraparound)
Summary
SumatraPDF is a multi-format reader for Windows. All versions contain an off-by-one error in the validation code that only triggers with exactly 2 records, causing an integer underflow in the size calculation. This bug exists in PalmDbReader::GetRecord when opening a crafted Mobi file, resulting in an out-of-bounds heap read that crashes the app. There are no published fixes at the time of publication.
References
Impacted products
Vendor Product Version
sumatrapdfreader sumatrapdf Version: <= 3.5.2rel
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          ],
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    "dateReserved": "2026-01-19T14:49:06.312Z",
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CVE-2026-23512 (GCVE-0-2026-23512)
Vulnerability from cvelistv5
Published
2026-01-14 20:31
Modified
2026-01-14 21:04
Severity ?
8.6 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
CWE
Summary
SumatraPDF is a multi-format reader for Windows. In 3.5.2 and earlier, there is a Untrusted Search Path vulnerability when Advanced Options setting is trigger. The application executes notepad.exe without specifying an absolute path when using the Advanced Options setting. On Windows, this allows execution of a malicious notepad.exe placed in the application's installation directory, leading to arbitrary code execution.
References
Impacted products
Vendor Product Version
sumatrapdfreader sumatrapdf Version: <= 3.5.2
 Create a notification for this product.
Show details on NVD website

To clipboard 

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