CVE-2026-23951

{"id": "CVE-2026-23951", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-23951", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-01-22T21:44:16.346671Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "sumatrapdfreader", "product": "sumatrapdf", "versions": [{"status": "affected", "version": "<= 3.5.2rel"}]}]}], "published": "2026-01-22T01:15:52.633", "references": [{"url": "https://github.com/sumatrapdfreader/sumatrapdf/blob/master/src/PalmDbReader.cpp", "tags": ["Product"], "source": "security-advisories@github.com"}, {"url": "https://github.com/sumatrapdfreader/sumatrapdf/security/advisories/GHSA-hj4w-c5x8-p2hv", "tags": ["Exploit", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-125"}, {"lang": "en", "value": "CWE-191"}]}, {"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-193"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "SumatraPDF es un lector multiformato para Windows. Todas las versiones contienen un error de off-by-one en el c\u00f3digo de validaci\u00f3n que solo se activa con exactamente 2 registros, causando un subdesbordamiento de enteros en el c\u00e1lculo del tama\u00f1o. Este error existe en PalmDbReader::GetRecord al abrir un archivo Mobi manipulado, resultando en una lectura de mont\u00f3n fuera de l\u00edmites que bloquea la aplicaci\u00f3n. No hay correcciones publicadas en el momento de la publicaci\u00f3n."}], "lastModified": "2026-06-17T10:22:20.423", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:sumatrapdfreader:sumatrapdf:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "EDC837AF-B0DA-4A27-8CF4-EE8846526B37"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}