{"id":"CVE-2026-79590","details":"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.","modified":"2026-09-12T08:07:31.306199Z","published":"2026-09-10T00:00:00Z","database_specific":{"cna_assigner":"mitre","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/79xxx/CVE-2026-79590.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/79xxx/CVE-2026-79590.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-79590"},{"type":"REPORT","url":"https://github.com/mruby/mruby/issues/7032"},{"type":"FIX","url":"https://github.com/takumin/mruby/commit/c6866eed4ad5640b552ba79d16063e7ec70a0ac9"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/takumin/mruby","events":[{"introduced":"0"},{"fixed":"c6866eed4ad5640b552ba79d16063e7ec70a0ac9"}],"database_specific":{"source":"REFERENCES"}}],"versions":["1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-79590.json","vanir_signatures_modified":"2026-09-12T08:07:31Z","vanir_signatures":[{"digest":{"line_hashes":["299320156707072644351766599381672284948","160045294839455634109678547094420768054","202852509292430754778706357174299523567"],"threshold":0.9},"id":"CVE-2026-79590-2d157a0b","signature_type":"Line","signature_version":"v1","source":"https://github.com/takumin/mruby/commit/c6866eed4ad5640b552ba79d16063e7ec70a0ac9","target":{"file":"mrbgems/mruby-compiler/include/prism_xallocator.h"},"deprecated":false}]}}],"schema_version":"1.9.0"}