{"id":"CVE-2026-113679","aliases":["AZL-109806","AZL-112814","DEBIAN-CVE-2026-113679","EUVD-2026-105095","GHSA-hqgm-v7cx-mq25","UBUNTU-CVE-2026-113679"],"status":"published","title":"HarfBuzz 8.0.0 through 14.6.0 Out-of-Bounds Write via WebAssembly font_glyph_to_string","description":"HarfBuzz 8.0.0 through 14.6.0 contains an out-of-bounds write vulnerability in the experimental WebAssembly shaper because the font_glyph_to_string import has a wrong WAMR signature. Attackers can supply a crafted font whose wasm module places the output buffer near linear memory's end, writing glyph-name bytes into host memory to crash or corrupt applications.","severity":{"version":"4.0","score":7.3,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00169,"percentile":0.06324,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-787"],"published":"2026-10-20T15:40:40Z","modified":"2026-11-07T14:18:06Z","affected":[{"source":"osv","ecosystem":"Azure Linux:3","package":"harfbuzz","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"8.3.0-4"}]}]},{"source":"osv","ecosystem":"Azure Linux:3","package":"qtbase","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"6.6.3-7"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"harfbuzz","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["10.0.1-1","10.1.0-1","10.1.0-2","10.2.0-1","10.2.0-2","11.4.5-1","11.5.0-1","12.1.0-1","12.2.0-1","12.3.0-1","12.3.0-2","12.3.0-3","12.3.0-4","12.3.1-1","12.3.2-1","12.3.2-2","6.0.0+dfsg-3","8.0.0-1","8.0.0-2","8.0.0-3","8.0.1-1","8.3.0-1","8.3.0-2","9.0.0-1"]},{"source":"osv","ecosystem":"Debian:13","package":"harfbuzz","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["10.2.0-1","10.2.0-1+deb13u1","10.2.0-2","11.4.5-1","11.5.0-1","12.1.0-1","12.2.0-1","12.3.0-1","12.3.0-2","12.3.0-3","12.3.0-4","12.3.1-1","12.3.2-1","12.3.2-2"]},{"source":"osv","ecosystem":"Debian:14","package":"harfbuzz","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["10.2.0-1","10.2.0-2","11.4.5-1","11.5.0-1","12.1.0-1","12.2.0-1","12.3.0-1","12.3.0-2","12.3.0-3","12.3.0-4","12.3.1-1","12.3.2-1","12.3.2-2"]},{"source":"osv","ecosystem":"Ubuntu:14.04:LTS","package":"harfbuzz","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.19-1","0.9.19-1ubuntu1","0.9.24-2ubuntu1","0.9.24-2ubuntu2","0.9.24-2ubuntu3","0.9.25-1ubuntu1","0.9.26-3","0.9.26-4","0.9.27-1","0.9.27-1ubuntu1","0.9.27-1ubuntu1.1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"harfbuzz","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.1-1build2","1.0.1-1ubuntu0.1","1.0.1-1ubuntu0.1+esm1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"harfbuzz","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.2-1","1.4.2-1build1","1.6.3-1build1","1.7.1-1","1.7.2-1","1.7.2-1ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"harfbuzz","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.6.1-3","2.6.2-1","2.6.4-1","2.6.4-1ubuntu1","2.6.4-1ubuntu2","2.6.4-1ubuntu3","2.6.4-1ubuntu4","2.6.4-1ubuntu4.2","2.6.4-1ubuntu4.3"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"harfbuzz","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.7.4-1ubuntu1","2.7.4-1ubuntu2","2.7.4-1ubuntu3","2.7.4-1ubuntu3.1","2.7.4-1ubuntu3.2"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"harfbuzz","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.0.1-1","8.0.1-1build1","8.3.0-2","8.3.0-2build1","8.3.0-2build2"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"harfbuzz","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["12.3.2-2"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"harfbuzz","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["10.2.0-1","12.1.0-1","12.1.0-1build1","12.2.0-1","12.3.0-3","12.3.0-4","12.3.1-1","12.3.2-1","12.3.2-2"]}],"products":[{"vendor":"harfbuzz","product":"harfbuzz"}],"references":[{"url":"https://github.com/harfbuzz/harfbuzz/pull/6414","tags":["patch","issue-tracking","fix"]},{"url":"https://github.com/harfbuzz/harfbuzz/commit/5e821de8256d01780566b5c8ab7886fae4c93da8","tags":["patch","fix"]},{"url":"https://github.com/harfbuzz/harfbuzz/blob/14.6.0/src/hb-wasm-api-list.hh#L85","tags":["technical-description","article"]},{"url":"https://github.com/harfbuzz/harfbuzz/blob/14.6.0/src/hb-wasm-api-font.hh#L115-L123","tags":["technical-description","article"]},{"url":"https://www.vulncheck.com/advisories/harfbuzz-8.0.0-through-14.6.0-out-of-bounds-write-via-webassembly-font-glyph-to-string","tags":["third-party-advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-113679","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-hqgm-v7cx-mq25"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/113xxx/CVE-2026-113679.json","tags":["advisory"]},{"url":"https://github.com/harfbuzz/harfbuzz","tags":["package"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-113679","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-113679","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-113679","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-113679","title":"HarfBuzz 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Attackers can supply a crafted font whose wasm module places the output buffer near linear memory's end, writing glyph-name bytes into host memory to crash or corrupt applications.","status":"published","published":"2026-10-20T15:40:40.379Z","modified":"2026-10-20T16:21:50.578Z","cvss":[{"version":"4.0","score":7.3,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"},{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T13:44:29.519518Z"}],"euvd":[{"id":"EUVD-2026-105095","description":"HarfBuzz 8.0.0 through 14.6.0 contains an out-of-bounds write vulnerability in the experimental WebAssembly shaper because the font_glyph_to_string import has a wrong WAMR signature. Attackers can supply a crafted font whose wasm module places the output buffer near linear memory's end, writing glyph-name bytes into host memory to crash or corrupt applications.","status":"published","published":"2026-10-20T15:40:40Z","modified":"2026-10-20T16:21:50Z","cvss":[{"version":"4.0","score":7.3,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T16:59:43.600473Z"}],"ghsa":[{"id":"GHSA-hqgm-v7cx-mq25","title":"HarfBuzz 8.0.0 through 14.6.0 contains an out-of-bounds write vulnerability in the experimental...","description":"HarfBuzz 8.0.0 through 14.6.0 contains an out-of-bounds write vulnerability in the experimental WebAssembly shaper because the font_glyph_to_string import has a wrong WAMR signature. Attackers can supply a crafted font whose wasm module places the output buffer near linear memory's end, writing glyph-name bytes into host memory to crash or corrupt applications.","status":"published","published":"2026-10-20T18:31:45Z","modified":"2026-10-20T18:31:50Z","cvss":[{"version":"4.0","score":7.3,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"},{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T15:14:04.153849Z"}],"nvd":[{"id":"CVE-2026-113679","description":"HarfBuzz 8.0.0 through 14.6.0 contains an out-of-bounds write vulnerability in the experimental WebAssembly shaper because the font_glyph_to_string import has a wrong WAMR signature. Attackers can supply a crafted font whose wasm module places the output buffer near linear memory's end, writing glyph-name bytes into host memory to crash or corrupt applications.","status":"published","published":"2026-10-20T16:17:12.77Z","modified":"2026-10-20T20:06:37.15Z","cvss":[{"version":"4.0","score":7.3,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:13:01.161484Z"}],"osv":[{"id":"CVE-2026-113679","title":"HarfBuzz 8.0.0 through 14.6.0 Out-of-Bounds Write via WebAssembly font_glyph_to_string","description":"HarfBuzz 8.0.0 through 14.6.0 contains an out-of-bounds write vulnerability in the experimental WebAssembly shaper because the font_glyph_to_string import has a wrong WAMR signature. Attackers can supply a crafted font whose wasm module places the output buffer near linear memory's end, writing glyph-name bytes into host memory to crash or corrupt applications.","status":"published","published":"2026-10-20T15:40:40.379Z","modified":"2026-10-28T11:02:18.120363757Z","cvss":[{"version":"4.0","score":7.3,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T15:44:56.310988Z"},{"id":"DEBIAN-CVE-2026-113679","description":"HarfBuzz 8.0.0 through 14.6.0 contains an out-of-bounds write vulnerability in the experimental WebAssembly shaper because the font_glyph_to_string import has a wrong WAMR signature. Attackers can supply a crafted font whose wasm module places the output buffer near linear memory's end, writing glyph-name bytes into host memory to crash or corrupt applications.","status":"published","published":"2026-10-20T16:17:12.77Z","modified":"2026-10-23T22:00:06.339978668Z","cvss":[{"version":"4.0","score":7.3,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"}],"updated_at":"2026-11-02T15:45:50.391389Z"},{"id":"UBUNTU-CVE-2026-113679","description":"HarfBuzz 8.0.0 through 14.6.0 contains an out-of-bounds write vulnerability in the experimental WebAssembly shaper because the font_glyph_to_string import has a wrong WAMR signature. Attackers can supply a crafted font whose wasm module places the output buffer near linear memory's end, writing glyph-name bytes into host memory to crash or corrupt applications.","status":"published","published":"2026-10-20T16:17:00Z","modified":"2026-10-28T20:15:44.620792001Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"},{"version":"4.0","score":7.3,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T16:55:59.591851Z"},{"id":"AZL-109806","title":"CVE-2026-113679 affecting package harfbuzz 8.3.0-4","description":"HarfBuzz 8.0.0 through 14.6.0 contains an out-of-bounds write vulnerability in the experimental WebAssembly shaper because the font_glyph_to_string import has a wrong WAMR signature. Attackers can supply a crafted font whose wasm module places the output buffer near linear memory's end, writing glyph-name bytes into host memory to crash or corrupt applications.","status":"published","published":"2026-10-20T16:17:12Z","modified":"2026-10-27T05:36:16Z","updated_at":"2026-11-02T15:28:02.044071Z"},{"id":"AZL-112814","title":"CVE-2026-113679 affecting package qtbase 6.6.3-7","description":"HarfBuzz 8.0.0 through 14.6.0 contains an out-of-bounds write vulnerability in the experimental WebAssembly shaper because the font_glyph_to_string import has a wrong WAMR signature. Attackers can supply a crafted font whose wasm module places the output buffer near linear memory's end, writing glyph-name bytes into host memory to crash or corrupt applications.","status":"published","published":"2026-10-20T16:17:12Z","modified":"2026-11-07T14:18:06.489380369Z","updated_at":"2026-11-07T14:48:11.583685Z"}]}}