{"api_version":"1","generated_at":"2026-06-16T22:05:42+00:00","cve":"CVE-2026-12326","urls":{"html":"https://cve.report/CVE-2026-12326","api":"https://cve.report/api/cve/CVE-2026-12326.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-12326","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-12326"},"summary":{"title":"Memory safety bugs fixed in Firefox 152 and Thunderbird 152","description":"Memory safety bugs present in Firefox 151 and Thunderbird 151. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. 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Pierron, Nika Layzell, Randell Jesup, Rob Wu, Ryan Hunt, Steve Fink, Tom Schuster, Tomoya Nakanishi, Yannis Juglaret, Serge Guelton and the Mozilla Fuzzing Team","lang":"en"}],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":7.3,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","version":"3.1"}},{"other":{"content":{"id":"CVE-2026-12326","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-06-16T15:50:36.249811Z","version":"2.0.3"},"type":"ssvc"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-119","description":"CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-06-16T15:50:39.123Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"product":"Firefox","vendor":"Mozilla","versions":[{"lessThanOrEqual":"*","status":"unaffected","version":"152","versionType":"rpm"}]},{"product":"Thunderbird","vendor":"Mozilla","versions":[{"lessThanOrEqual":"*","status":"unaffected","version":"152","versionType":"rpm"}]}],"credits":[{"lang":"en","value":"Ashley Zebrowski, Christian Holler, Dan Baker, Jan de Mooij, Jon Coppeard, Maurice Dauer, Nicolas B. Pierron, Nika Layzell, Randell Jesup, Rob Wu, Ryan Hunt, Steve Fink, Tom Schuster, Tomoya Nakanishi, Yannis Juglaret, Serge Guelton and the Mozilla Fuzzing Team"}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Memory safety bugs present in Firefox 151 and Thunderbird 151. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 152 and Thunderbird 152."}],"value":"Memory safety bugs present in Firefox 151 and Thunderbird 151. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 152 and Thunderbird 152."}],"providerMetadata":{"dateUpdated":"2026-06-16T16:08:45.204Z","orgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","shortName":"mozilla"},"references":[{"name":"Moderate Severity memory safety bugs fixed in Firefox 152 and Thunderbird 152","url":"https://bugzilla.mozilla.org/buglist.cgi?bug_id=1767455%2C2004308%2C2024445%2C2028182%2C2029765%2C2029883%2C2030110%2C2030149%2C2030366%2C2030374%2C2030564%2C2031120%2C2033411%2C2038695%2C2042465%2C2042781%2C2042907"},{"name":"Low Severity memory safety bugs fixed in Firefox 152 and Thunderbird 152","url":"https://bugzilla.mozilla.org/buglist.cgi?bug_id=2021955%2C2025960%2C2029066%2C2029403%2C2029435%2C2029803%2C2030570%2C2030573%2C2032264%2C2033234%2C2034816%2C2035907%2C2035963%2C2036895%2C2036898%2C2036907%2C2036909%2C2036928%2C2036931%2C2036932%2C2036934%2C2039238%2C2039463"},{"name":"High Severity memory safety bugs fixed in Firefox 152 and Thunderbird 152","url":"https://bugzilla.mozilla.org/buglist.cgi?bug_id=2039050%2C2042718%2C2042760%2C2044831%2C2045307%2C2045398%2C2045516%2C2045572%2C2041741%2C2044433"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-57/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-60/"}],"title":"Memory safety bugs fixed in Firefox 152 and Thunderbird 152"}},"cveMetadata":{"assignerOrgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","assignerShortName":"mozilla","cveId":"CVE-2026-12326","datePublished":"2026-06-16T11:52:59.767Z","dateReserved":"2026-06-15T15:08:21.967Z","dateUpdated":"2026-06-16T16:08:45.204Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-16 13:16:33","lastModifiedDate":"2026-06-16 17:16:38","problem_types":["CWE-119","CWE-119 CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer"],"metrics":{"cvssMetricV31":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","baseScore":7.3,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"LOW"},"exploitabilityScore":3.9,"impactScore":3.4}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"12326","Ordinal":"1","Title":"Memory safety bugs fixed in Firefox 152 and Thunderbird 152","CVE":"CVE-2026-12326","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"12326","Ordinal":"1","NoteData":"Memory safety bugs present in Firefox 151 and Thunderbird 151. 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