{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-18497","assignerOrgId":"37e5125f-f79b-445b-8fad-9564f167944b","state":"PUBLISHED","assignerShortName":"certcc","dateReserved":"2026-07-31T15:58:31.185Z","datePublished":"2026-08-07T14:19:42.854Z","dateUpdated":"2026-08-12T13:51:47.080Z"},"containers":{"cna":{"title":"The nothings stb TrueType library contains a heap buffer overflow vulnerability","descriptions":[{"lang":"en","value":"A heap-buffer-overflow vulnerability exists in the nothings stb TrueType library, up to version 1.26, that is used for parsing TrueType font files. The vulnerability exists in the stbtt__GetGlyphShapeTT() function within the nothings stb_truetype.h library when parsing malformed TTF (TrueType Font) files. The vulnerability resides in the glyph data parsing path.\r\n\r\nAn attacker can craft a malformed TTF file with an inflated endPtsOfContours value and truncate the remaining glyph data. When an application utilizing stb_truetype.h (such as various game engines or graphics software) attempts to load, bake, or render this malformed font via stbtt_GetGlyphShape(), the parser will attempt to read past the end of the glyph data buffer, triggering the out-of-bounds read."}],"source":{"discovery":"UNKNOWN"},"affected":[{"vendor":"Sean Barrett (nothings)","product":"nothings stb","versions":[{"status":"affected","version":"1.26"}]}],"problemTypes":[{"descriptions":[{"lang":"en","description":"CWE-122: Heap-based Buffer Overflow"}]}],"references":[{"url":"https://cwe.mitre.org/data/definitions/122.html"},{"url":"https://github.com/nothings/stb"},{"url":"https://github.com/nothings/stb/issues/1905"},{"url":"https://kb.cert.org/vuls/id/987105"}],"x_generator":{"engine":"VINCE 3.0.43","env":"prod","origin":"https://cveawg.mitre.org/api/cve/CVE-2026-18497"},"providerMetadata":{"orgId":"37e5125f-f79b-445b-8fad-9564f167944b","shortName":"certcc","dateUpdated":"2026-08-07T14:19:42.854Z"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://www.kb.cert.org/vuls/id/987105"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2026-08-07T15:17:50.021Z"}},{"problemTypes":[{"descriptions":[{"type":"CWE","cweId":"CWE-122","lang":"en","description":"CWE-122 Heap-based Buffer Overflow"}]}],"references":[{"url":"https://github.com/nothings/stb/issues/1905","tags":["exploit"]}],"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.1,"attackVector":"LOCAL","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H","integrityImpact":"NONE","userInteraction":"REQUIRED","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-08-07T17:58:51.313628Z","id":"CVE-2026-18497","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-12T13:51:47.080Z"}}]}}