{"id":"CVE-2021-36088","aliases":["BIT-fluent-bit-2021-36088","EUVD-2021-22721","GHSA-89w3-2j93-4g79"],"status":"published","title":"Fluent Bit (aka fluent-bit) 1.7.0 through 1.7,4 has a double free in flb_free (called from...","description":"Fluent Bit (aka fluent-bit) 1.7.0 through 1.7.4 has a double free in flb_free (called from flb_parser_json_do and flb_parser_do).","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.02384,"percentile":0.84036,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-415"],"published":"2021-07-01T02:50:19Z","modified":"2026-10-20T14:25:23Z","fixes":[{"ecosystem":"Bitnami","package":"fluent-bit","fixed_in":["1.7.5"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"fluent-bit","ranges":[{"type":"SEMVER","events":[{"introduced":"1.7.0"},{"fixed":"1.7.5"}]}]}],"products":[{"vendor":"treasuredata","product":"fluent_bit"}],"references":[{"url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=33750","tags":["x_transferred","Exploit","Patch","Third Party Advisory","advisory","fix"]},{"url":"https://github.com/google/oss-fuzz-vulns/blob/main/vulns/fluent-bit/OSV-2021-702.yaml","tags":["x_transferred","Third Party Advisory","advisory"]},{"url":"https://github.com/fluent/fluent-bit/commit/22346a74c07ceb90296be872be2d53eb92252a54","tags":["x_transferred","Patch","Third Party Advisory","advisory","fix"]},{"url":"https://github.com/fluent/fluent-bit/pull/3453","tags":["x_transferred","Patch","Third Party Advisory","advisory","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-36088","tags":["web"]},{"url":"https://github.com/advisories/GHSA-89w3-2j93-4g79"}],"sources":{"cve":[{"id":"CVE-2021-36088","description":"Fluent Bit (aka fluent-bit) 1.7.0 through 1.7.4 has a double free in flb_free (called from flb_parser_json_do and flb_parser_do).","status":"published","published":"2021-07-01T02:50:19Z","modified":"2024-08-04T00:47:43.818Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp"}],"cwes":["CWE-415"],"updated_at":"2026-11-02T14:33:05.989686Z"}],"euvd":[{"id":"EUVD-2021-22721","description":"Fluent Bit (aka fluent-bit) 1.7.0 through 1.7.4 has a double free in flb_free (called from flb_parser_json_do and flb_parser_do).","status":"published","published":"2021-07-01T02:50:19Z","modified":"2024-08-04T00:47:43Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-03T03:24:29.877227Z"}],"ghsa":[{"id":"GHSA-89w3-2j93-4g79","title":"Fluent Bit (aka fluent-bit) 1.7.0 through 1.7,4 has a double free in flb_free (called from...","description":"Fluent Bit (aka fluent-bit) 1.7.0 through 1.7,4 has a double free in flb_free (called from flb_parser_json_do and flb_parser_do).","status":"published","published":"2022-05-24T19:06:43Z","modified":"2024-06-02T05:06:11Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-415"],"updated_at":"2026-11-02T14:57:24.376732Z"}],"nvd":[{"id":"CVE-2021-36088","description":"Fluent Bit (aka fluent-bit) 1.7.0 through 1.7.4 has a double free in flb_free (called from flb_parser_json_do and flb_parser_do).","status":"published","published":"2021-07-01T03:15:08.847Z","modified":"2026-06-17T03:58:21.14Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-415"],"updated_at":"2026-11-02T14:06:55.259633Z"}],"osv":[{"id":"CVE-2021-36088","description":"Fluent Bit (aka fluent-bit) 1.7.0 through 1.7.4 has a double free in flb_free (called from flb_parser_json_do and flb_parser_do).","status":"published","published":"2021-07-01T03:15:08.847Z","modified":"2026-10-20T14:25:23.101649433Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:20.434873Z"},{"id":"BIT-fluent-bit-2021-36088","description":"Fluent Bit (aka fluent-bit) 1.7.0 through 1.7.4 has a double free in flb_free (called from flb_parser_json_do and flb_parser_do).","status":"published","published":"2024-03-06T10:52:12.289Z","modified":"2026-09-08T08:47:32.549227694Z","updated_at":"2026-11-02T15:28:29.563843Z"}]}}