{"id":"CVE-2026-79590","aliases":["DEBIAN-CVE-2026-79590","EUVD-2026-75871","GHSA-q9f2-rhj2-x3xg","UBUNTU-CVE-2026-79590"],"status":"published","title":"A NULL pointer dereference vulnerability exists in the Prism parser component of mruby 4.0.0. An...","description":"A NULL pointer dereference vulnerability exists in the Prism parser component of mruby 4.0.0. An attacker can provide a specially crafted Ruby source file that triggers the parser to pass a NULL pointer to nonnull string handling functions, resulting in undefined behavior and application crash.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-11","score":0.00367,"percentile":0.30929,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-476"],"published":"2026-09-10T00:00:00Z","modified":"2026-10-28T11:17:58Z","affected":[{"source":"osv","ecosystem":"Debian:12","package":"mruby","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.0-3","3.2.0-1","3.2.0-2","3.3.0-1","3.3.0~rc2-1","3.4.0-1","3.4.0-1~exp1","3.4.0-1~exp2","3.4.0-2","3.4.0-3","4.0.0-1"]},{"source":"osv","ecosystem":"Debian:13","package":"mruby","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.3.0-1","3.4.0-1","3.4.0-1~exp1","3.4.0-1~exp2","3.4.0-2","3.4.0-3","4.0.0-1"]},{"source":"osv","ecosystem":"Debian:14","package":"mruby","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.3.0-1","3.4.0-1","3.4.0-1~exp1","3.4.0-1~exp2","3.4.0-2","3.4.0-3","4.0.0-1"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"mruby","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.0+20150817+gita1731254-1","1.1.0+20150906+git1cbbb7e1-1","1.2.0+20160315+git4f20d58a-1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"mruby","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.0-1","1.3.0+20170925+git38185028-1","1.3.0+20171029+git77edafb0-1","1.4.0-1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"mruby","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.0-1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"mruby","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.2-3","3.0.0-1","3.0.0-3"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"mruby","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.2.0-1","3.2.0-2"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"mruby","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.4.0-2","3.4.0-3","4.0.0-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"mruby","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.3.0-1","3.4.0-2"]}],"references":[{"url":"https://github.com/mruby/mruby/issues/7032","tags":["exploit","report"]},{"url":"https://github.com/takumin/mruby/commit/c6866eed4ad5640b552ba79d16063e7ec70a0ac9","tags":["fix","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-79590","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-q9f2-rhj2-x3xg"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/79xxx/CVE-2026-79590.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-79590","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-79590","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-79590","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-79590","description":"A NULL pointer dereference vulnerability exists in the Prism parser component of mruby 4.0.0. An attacker can provide a specially crafted Ruby source file that triggers the parser to pass a NULL pointer to nonnull string handling functions, resulting in undefined behavior and application crash.","status":"published","published":"2026-09-10T00:00:00Z","modified":"2026-09-14T17:16:15.462Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"adp"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T13:50:27.582139Z"}],"euvd":[{"id":"EUVD-2026-75871","description":"A NULL pointer dereference vulnerability exists in the Prism parser component of mruby 4.0.0. 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An attacker can provide a specially crafted Ruby source file that triggers the parser to pass a NULL pointer to nonnull string handling functions, resulting in undefined behavior and application crash.","status":"published","published":"2026-09-11T00:31:14Z","modified":"2026-09-14T18:32:21Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T15:11:51.662242Z"}],"nvd":[{"id":"CVE-2026-79590","description":"A NULL pointer dereference vulnerability exists in the Prism parser component of mruby 4.0.0. An attacker can provide a specially crafted Ruby source file that triggers the parser to pass a NULL pointer to nonnull string handling functions, resulting in undefined behavior and application crash.","status":"published","published":"2026-09-10T22:17:00.267Z","modified":"2026-09-22T20:00:03.713Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:12:46.271848Z"}],"osv":[{"id":"CVE-2026-79590","description":"A NULL pointer dereference vulnerability exists in the Prism parser component of mruby 4.0.0. 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An attacker can provide a specially crafted Ruby source file that triggers the parser to pass a NULL pointer to nonnull string handling functions, resulting in undefined behavior and application crash.","status":"published","published":"2026-09-10T22:17:00.267Z","modified":"2026-09-23T08:47:30.074957007Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:46:04.001673Z"},{"id":"UBUNTU-CVE-2026-79590","description":"A NULL pointer dereference vulnerability exists in the Prism parser component of mruby 4.0.0. An attacker can provide a specially crafted Ruby source file that triggers the parser to pass a NULL pointer to nonnull string handling functions, resulting in undefined behavior and application crash.","status":"published","published":"2026-09-10T22:17:00Z","modified":"2026-10-17T13:01:09.444962172Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T16:57:18.015985Z"}]}}