{"id":"CVE-2026-100794","state":"PUBLISHED","title":"Sandbox escape due to incorrect boundary conditions in the Internationalization component","description":"Sandbox escape due to incorrect boundary conditions in the Internationalization component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17.","publishedAt":"2026-09-29T12:36:14.549Z","updatedAt":"2026-10-01T14:55:13.644Z","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 Thunderbird","Mozilla Firefox"],"affected":[{"vendor":"Mozilla","product":"Thunderbird","versions":[{"version":"140.17","status":"unaffected","lessThanOrEqual":"140.*","versionType":"rpm"},{"version":"153.4","status":"unaffected","lessThanOrEqual":"153.*","versionType":"rpm"},{"version":"157","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]},{"vendor":"Mozilla","product":"Firefox","versions":[{"version":"140.17","status":"unaffected","lessThanOrEqual":"140.*","versionType":"rpm"},{"version":"153.4","status":"unaffected","lessThanOrEqual":"153.*","versionType":"rpm"},{"version":"157","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]}],"references":["https://bugzilla.mozilla.org/show_bug.cgi?id=2028871","https://www.mozilla.org/security/advisories/mfsa2026-100/","https://www.mozilla.org/security/advisories/mfsa2026-101/","https://www.mozilla.org/security/advisories/mfsa2026-102/","https://www.mozilla.org/security/advisories/mfsa2026-103/","https://www.mozilla.org/security/advisories/mfsa2026-97/","https://www.mozilla.org/security/advisories/mfsa2026-99/"],"weaknesses":["CWE-119"],"ingestedAt":"2026-10-29T20:10:13.529Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/100xxx/CVE-2026-100794.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-100794","state":"PUBLISHED","datePublished":"2026-09-29T12:36:14.549Z","dateUpdated":"2026-10-01T14:55:13.644Z","assignerShortName":"mozilla","assignerOrgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","dateReserved":"2026-09-26T19:17:28.521Z"},"containers":{"cna":{"title":"Sandbox escape due to incorrect boundary conditions in the Internationalization component","descriptions":[{"lang":"en","value":"Sandbox escape due to incorrect boundary conditions in the Internationalization component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17."}],"affected":[{"vendor":"Mozilla","product":"Thunderbird","versions":[{"version":"140.17","status":"unaffected","lessThanOrEqual":"140.*","versionType":"rpm"},{"version":"153.4","status":"unaffected","lessThanOrEqual":"153.*","versionType":"rpm"},{"version":"157","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]},{"vendor":"Mozilla","product":"Firefox","versions":[{"version":"140.17","status":"unaffected","lessThanOrEqual":"140.*","versionType":"rpm"},{"version":"153.4","status":"unaffected","lessThanOrEqual":"153.*","versionType":"rpm"},{"version":"157","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]}],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2028871"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-100/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-101/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-102/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-103/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-97/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-99/"}],"providerMetadata":{"shortName":"mozilla","orgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","dateUpdated":"2026-09-30T17:20:37.115Z"},"credits":[{"lang":"en","value":"Mozilla"}]},"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":"2026-10-01T14:55:02.726961Z","id":"CVE-2026-100794","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-119","type":"CWE","lang":"en","description":"CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-01T14:55:13.644Z"}}]}}}