{"id":"CVE-2025-4918","state":"PUBLISHED","title":"Out-of-bounds access when resolving Promise objects","description":"An attacker was able to perform an out-of-bounds read or write on a JavaScript `Promise` object. This vulnerability was fixed in Firefox 138.0.4, Firefox ESR 128.10.1, Firefox ESR 115.23.1, Thunderbird 128.10.2, and Thunderbird 138.0.2.","publishedAt":"2025-05-17T21:07:26.745Z","updatedAt":"2026-04-13T14:25:54.968Z","severity":{"score":9.8,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"CISA-ADP"},"assigner":"mozilla","products":["Mozilla Firefox","Mozilla Thunderbird"],"affected":[{"vendor":"Mozilla","product":"Firefox","versions":[{"version":"115.23.1","status":"unaffected","lessThanOrEqual":"115.*","versionType":"rpm"},{"version":"128.10.1","status":"unaffected","lessThanOrEqual":"128.*","versionType":"rpm"},{"version":"138.0.4","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]},{"vendor":"Mozilla","product":"Thunderbird","versions":[{"version":"128.10.2","status":"unaffected","lessThanOrEqual":"128.*","versionType":"rpm"},{"version":"138.0.2","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]}],"references":["https://bugzilla.mozilla.org/show_bug.cgi?id=1966612","https://www.mozilla.org/security/advisories/mfsa2025-36/","https://www.mozilla.org/security/advisories/mfsa2025-37/","https://www.mozilla.org/security/advisories/mfsa2025-38/","https://www.mozilla.org/security/advisories/mfsa2025-40/","https://www.mozilla.org/security/advisories/mfsa2025-41/","https://www.vicarius.io/vsociety/posts/cve-2025-4918-detect-firefox-out-of-bounds-write","https://www.vicarius.io/vsociety/posts/cve-2025-4918-mitigate-firefox-out-of-bounds-write","https://lists.debian.org/debian-lts-announce/2025/05/msg00046.html","https://lists.debian.org/debian-lts-announce/2025/05/msg00024.html"],"weaknesses":["CWE-125","CWE-787"],"ingestedAt":"2026-10-29T20:09:23.771Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/4xxx/CVE-2025-4918.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-4918","state":"PUBLISHED","datePublished":"2025-05-17T21:07:26.745Z","dateUpdated":"2026-04-13T14:25:54.968Z","assignerShortName":"mozilla","assignerOrgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","dateReserved":"2025-05-17T19:40:51.300Z"},"containers":{"cna":{"title":"Out-of-bounds access when resolving Promise objects","descriptions":[{"lang":"en","value":"An attacker was able to perform an out-of-bounds read or write on a JavaScript `Promise` object. This vulnerability was fixed in Firefox 138.0.4, Firefox ESR 128.10.1, Firefox ESR 115.23.1, Thunderbird 128.10.2, and Thunderbird 138.0.2."}],"affected":[{"vendor":"Mozilla","product":"Firefox","versions":[{"version":"115.23.1","status":"unaffected","lessThanOrEqual":"115.*","versionType":"rpm"},{"version":"128.10.1","status":"unaffected","lessThanOrEqual":"128.*","versionType":"rpm"},{"version":"138.0.4","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]},{"vendor":"Mozilla","product":"Thunderbird","versions":[{"version":"128.10.2","status":"unaffected","lessThanOrEqual":"128.*","versionType":"rpm"},{"version":"138.0.2","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]}],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1966612"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-36/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-37/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-38/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-40/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-41/"}],"providerMetadata":{"shortName":"mozilla","orgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","dateUpdated":"2026-04-13T14:25:54.968Z"},"credits":[{"lang":"en","value":"Edouard Bochin and Tao Yan from Palo Alto Networks working with Trend Micro's Zero Day Initiative"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":9.8,"attackVector":"NETWORK","baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"id":"CVE-2025-4918","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2025-05-20T03:55:17.219008Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-125","lang":"en","type":"CWE","description":"CWE-125 Out-of-bounds Read"}]},{"descriptions":[{"cweId":"CWE-787","lang":"en","type":"CWE","description":"CWE-787 Out-of-bounds Write"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-02-26T18:28:06.529Z"}},{"title":"CVE Program Container","references":[{"url":"https://www.vicarius.io/vsociety/posts/cve-2025-4918-detect-firefox-out-of-bounds-write"},{"url":"https://www.vicarius.io/vsociety/posts/cve-2025-4918-mitigate-firefox-out-of-bounds-write"},{"url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00046.html"},{"url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00024.html"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2025-11-03T20:05:17.591Z"}}]}}}