{"id":"JLSEC-2026-79","details":"fontconfig before 2.17.1 has an off-by-one error in allocation during sfnt capability handling, leading to a one-byte out-of-bounds write, and potentially a crash or code execution. This is in FcFontCapabilities in fcfreetype.c.","modified":"2026-07-18T00:02:23.374449678Z","published":"2026-04-11T14:47:51.147Z","upstream":["CVE-2026-34085"],"database_specific":{"license":"CC-BY-4.0","sources":[{"published":"2026-03-25T17:17:09.210Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-34085","html_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34085","database_specific":{"status":"Analyzed"},"id":"CVE-2026-34085","imported":"2026-07-17T22:39:59.604Z","modified":"2026-06-17T10:38:32.393Z"}]},"references":[{"type":"WEB","url":"https://gitlab.freedesktop.org/fontconfig/fontconfig/-/commit/b9bec06d73340f1b5727302d13ac3df307b7febc"},{"type":"WEB","url":"https://gitlab.freedesktop.org/fontconfig/fontconfig/-/merge_requests/446"},{"type":"WEB","url":"https://gitlab.freedesktop.org/fontconfig/fontconfig/-/work_items/481"}],"affected":[{"package":{"name":"Fontconfig_jll","ecosystem":"Julia","purl":"pkg:julia/Fontconfig_jll?uuid=a3f928ae-7b40-5064-980b-68af3947d34b"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.17.1+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-79.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}