{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-12312: Memory safety bug fixed in Thunderbird 152","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-12312","status":"final","version":"1","initial_release_date":"2026-06-16T11:52:45.734Z","current_release_date":"2026-06-16T18:15:46.903Z","revision_history":[{"date":"2026-06-16T11:52:45.734Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"Memory safety bug fixed in Thunderbird 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-12312 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-12312"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-12312"},{"category":"external","summary":"bugzilla.mozilla.org","url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2040383"},{"category":"external","summary":"mozilla.org","url":"https://www.mozilla.org/security/advisories/mfsa2026-57/"},{"category":"external","summary":"mozilla.org","url":"https://www.mozilla.org/security/advisories/mfsa2026-58/"},{"category":"external","summary":"mozilla.org","url":"https://www.mozilla.org/security/advisories/mfsa2026-60/"},{"category":"external","summary":"mozilla.org","url":"https://www.mozilla.org/security/advisories/mfsa2026-61/"}]},"product_tree":{"branches":[{"category":"vendor","name":"Mozilla","branches":[{"category":"product_name","name":"Firefox","branches":[{"category":"product_version","name":"*","product":{"name":"Mozilla Firefox *","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"140.12","product":{"name":"Mozilla Firefox 140.12","product_id":"CSAFPID-2","product_identification_helper":{"cpe":"cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"152","product":{"name":"Mozilla Firefox 152","product_id":"CSAFPID-3","product_identification_helper":{"cpe":"cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Mozilla","branches":[{"category":"product_name","name":"Thunderbird","branches":[{"category":"product_version","name":"*","product":{"name":"Mozilla Thunderbird *","product_id":"CSAFPID-4","product_identification_helper":{"cpe":"cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"140.12","product":{"name":"Mozilla Thunderbird 140.12","product_id":"CSAFPID-5","product_identification_helper":{"cpe":"cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"152","product":{"name":"Mozilla Thunderbird 152","product_id":"CSAFPID-6","product_identification_helper":{"cpe":"cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-12312","title":"Memory safety bug fixed in Thunderbird 152","notes":[{"category":"description","text":"Memory safety bug fixed in Thunderbird 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1","CSAFPID-4"],"fixed":["CSAFPID-2","CSAFPID-3","CSAFPID-5","CSAFPID-6"]},"scores":[{"cvss_v3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","baseScore":7.5,"baseSeverity":"HIGH"},"products":["CSAFPID-1","CSAFPID-4"]}],"remediations":[{"category":"vendor_fix","details":"Update to a fixed version: 140.12, 152.","product_ids":["CSAFPID-1","CSAFPID-4"]}]}]}