{"id":"CVE-2026-7321","state":"PUBLISHED","title":"Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component","description":"Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component. This vulnerability was fixed in Firefox 150, Thunderbird 150, Firefox ESR 140.10.1, and Thunderbird 140.10.1.","publishedAt":"2026-04-28T13:49:12.432Z","updatedAt":"2026-04-30T17:19:49.963Z","severity":{"score":9.6,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","source":"CISA-ADP"},"assigner":"mozilla","products":["Mozilla Firefox","Mozilla Thunderbird"],"affected":[{"vendor":"Mozilla","product":"Firefox","versions":[{"version":"140.10.1","status":"unaffected","lessThanOrEqual":"140.*","versionType":"rpm"},{"version":"150","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]},{"vendor":"Mozilla","product":"Thunderbird","versions":[{"version":"140.10.1","status":"unaffected","lessThanOrEqual":"140.*","versionType":"rpm"},{"version":"150","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]}],"references":["https://bugzilla.mozilla.org/show_bug.cgi?id=2029461","https://www.mozilla.org/security/advisories/mfsa2026-30/","https://www.mozilla.org/security/advisories/mfsa2026-33/","https://www.mozilla.org/security/advisories/mfsa2026-36/","https://www.mozilla.org/security/advisories/mfsa2026-39/"],"weaknesses":["CWE-120"],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/7xxx/CVE-2026-7321.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-7321","state":"PUBLISHED","datePublished":"2026-04-28T13:49:12.432Z","dateUpdated":"2026-04-30T17:19:49.963Z","assignerShortName":"mozilla","assignerOrgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","dateReserved":"2026-04-28T13:42:16.846Z"},"containers":{"cna":{"title":"Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component","descriptions":[{"lang":"en","value":"Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component. This vulnerability was fixed in Firefox 150, Thunderbird 150, Firefox ESR 140.10.1, and Thunderbird 140.10.1."}],"affected":[{"vendor":"Mozilla","product":"Firefox","versions":[{"version":"140.10.1","status":"unaffected","lessThanOrEqual":"140.*","versionType":"rpm"},{"version":"150","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]},{"vendor":"Mozilla","product":"Thunderbird","versions":[{"version":"140.10.1","status":"unaffected","lessThanOrEqual":"140.*","versionType":"rpm"},{"version":"150","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]}],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2029461"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-30/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-33/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-36/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-39/"}],"providerMetadata":{"shortName":"mozilla","orgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","dateUpdated":"2026-04-30T17:19:49.963Z"},"credits":[{"lang":"en","value":"The Mozilla Fuzzing Team"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"CHANGED","version":"3.1","baseScore":9.6,"attackVector":"NETWORK","baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"REQUIRED","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-04-28T14:48:32.615662Z","id":"CVE-2026-7321","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-120","type":"CWE","lang":"en","description":"CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-28T14:48:37.871Z"}}]}}}