CVE-2026-23951

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Source

https://cve.org/CVERecord?id=CVE-2026-23951

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23951.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-23951

Aliases

GHSA-hj4w-c5x8-p2hv

Published

2026-01-22T00:17:10.159Z

Modified

2026-01-23T02:47:43.030685Z

Severity

5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator

Summary

SumatraPDF's Integer Underflow in PalmDbReader Leads to Crash

Details

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.

Database specific

{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23951.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-125",
        "CWE-191"
    ]
}

References

Affected packages

Git / github.com/sumatrapdfreader/sumatrapdf

Affected ranges

Type

GIT

Repo

https://github.com/sumatrapdfreader/sumatrapdf

Events

Introduced

Last affected

646d1feddcc80b3b51072c5b27a1446487904175

Database specific

{
    "versions": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "3.5.2rel"
        }
    ]
}

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23951.json"