{"id":"CVE-2021-4188","details":"mruby is vulnerable to NULL Pointer Dereference","modified":"2026-07-08T23:58:00.094469Z","published":"2021-12-30T07:15:06.527Z","references":[{"type":"FIX","url":"https://github.com/mruby/mruby/commit/27d1e0132a0804581dca28df042e7047fd27eaa8"},{"type":"FIX","url":"https://huntr.dev/bounties/78533fb9-f3e0-47c2-86dc-d1f96d5bea28"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mruby/mruby","events":[{"introduced":"0"},{"last_affected":"0f45836b5954accf508f333f932741b925214471"},{"fixed":"27d1e0132a0804581dca28df042e7047fd27eaa8"}],"database_specific":{"cpe":"cpe:2.3:a:mruby:mruby:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"last_affected":"3.0.0"}],"source":["CPE_RANGE","REFERENCES"]}}],"versions":["3.0.0","3.0.0-rc","3.0.0-preview","1.2.0","1.1.0","1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-4188.json","vanir_signatures_modified":"2026-07-08T23:58:00Z","vanir_signatures":[{"id":"CVE-2021-4188-9967f21e","signature_type":"Function","signature_version":"v1","source":"https://github.com/mruby/mruby/commit/27d1e0132a0804581dca28df042e7047fd27eaa8","target":{"file":"src/array.c","function":"mrb_ary_shift_m"},"deprecated":false,"digest":{"length":890,"function_hash":"37954158918689870791588392275949326726"}},{"deprecated":false,"digest":{"line_hashes":["106015773944940121631457516801267141597","200164347224279747332640641164624681152","147759857033709860589441019877560062090","146407732127185322705323635000629719463","160133063868024290580254221049114076058","220261854329947105569061363168510393159","254278044406850844972228896550156874436","131457773645096981598414092035754655768","38924608948513807081127574170593596575","147897857018675925285525009373532303328"],"threshold":0.9},"id":"CVE-2021-4188-ec0cc330","signature_type":"Line","signature_version":"v1","source":"https://github.com/mruby/mruby/commit/27d1e0132a0804581dca28df042e7047fd27eaa8","target":{"file":"src/array.c"}}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}