{"id":"CVE-2026-58496","aliases":[],"title":"ThorVG: Out-of-bounds Read in SFNT/TTF Font Loader via Memory API","titleSource":"GitHub_M","descriptionSource":"GitHub_M","products":[{"vendor":"thorvg","name":"thorvg","platforms":[],"versions":[{"version":"< 1.0.7","status":"affected"}],"source":"GitHub_M","url":"https://www.cve.org/CVERecord?id=CVE-2026-58496"}],"remediation":[],"description":"Thor Vector Graphics (ThorVG) is a production-ready vector graphics engine. Prior to 1.0.7, the `SFNT/TTF` font loader's `SfntLoader::gen` function in `tvgSfntLoader.cpp` reads `data[0] through data[3]` to identify the font type without first checking that the input buffer contains at least four bytes. Loading an undersized font directly from memory through public APIs such as `tvg::Text::load` causes an out-of-bounds read. Loading through a file path using `mmap` can mask the read because of page alignment; the memory-loading API directly exposes it. Depending on memory layout, a malformed short font may crash the consuming application or disclose adjacent heap memory. This issue is fixed in version 1.0.7.","severity":"medium","score":4.3,"published":"2026-10-27T22:18:34.301Z","modified":"2026-10-27T22:18:34.301Z","withdrawn":false,"knownExploited":false,"affected":[],"references":["https://github.com/thorvg/thorvg/security/advisories/GHSA-crfw-c34f-vqrj","https://github.com/thorvg/thorvg/commit/1dc232a33535946b5eed5fd65e993b13226da0ca","https://github.com/thorvg/thorvg/releases/tag/v1.0.7"],"sources":[{"name":"CVE","id":"CVE-2026-58496","modified":"2026-10-27T22:18:34.301Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-58496"}],"assessments":[{"source":"GitHub_M","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","score":4.3}],"sourceAffected":[],"kev":{"status":"not-listed","checkedAt":"2026-10-28T17:50:31.025Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[]}