{"id":"CVE-2026-9308","state":"PUBLISHED","title":"Arbitrary JavaScript execution in Reader View due to wrong HTML replacement order","description":"Firefox for iOS Reader View replaced page content in its HTML template before replacing other internal placeholders. A malicious page could include a placeholder string that was later substituted with JSON-LD data, potentially resulting in arbitrary JavaScript execution. This vulnerability was fixed in Firefox for iOS 151.2.","publishedAt":"2026-06-01T11:24:09.708Z","updatedAt":"2026-06-01T13:52:59.059Z","severity":{"score":5.4,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","source":"CISA-ADP"},"assigner":"mozilla","products":["Mozilla Firefox for iOS"],"affected":[{"vendor":"Mozilla","product":"Firefox for iOS","versions":[{"version":"151.2","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]}],"references":["https://bugzilla.mozilla.org/show_bug.cgi?id=2039422","https://www.mozilla.org/security/advisories/mfsa2026-53/"],"weaknesses":["CWE-79"],"ingestedAt":"2026-10-29T20:13:52.441Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/9xxx/CVE-2026-9308.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-9308","state":"PUBLISHED","datePublished":"2026-06-01T11:24:09.708Z","dateUpdated":"2026-06-01T13:52:59.059Z","assignerShortName":"mozilla","assignerOrgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","dateReserved":"2026-05-22T18:16:25.742Z"},"containers":{"cna":{"title":"Arbitrary JavaScript execution in Reader View due to wrong HTML replacement order","descriptions":[{"lang":"en","value":"Firefox for iOS Reader View replaced page content in its HTML template before replacing other internal placeholders. A malicious page could include a placeholder string that was later substituted with JSON-LD data, potentially resulting in arbitrary JavaScript execution. This vulnerability was fixed in Firefox for iOS 151.2."}],"affected":[{"vendor":"Mozilla","product":"Firefox for iOS","versions":[{"version":"151.2","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]}],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2039422"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-53/"}],"providerMetadata":{"shortName":"mozilla","orgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","dateUpdated":"2026-06-01T11:24:09.708Z"},"credits":[{"lang":"en","value":"Muneaki Nishimura"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.4,"attackVector":"NETWORK","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","integrityImpact":"LOW","userInteraction":"REQUIRED","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"LOW"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-06-01T13:52:52.642902Z","id":"CVE-2026-9308","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-79","type":"CWE","lang":"en","description":"CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-01T13:52:59.059Z"}}]}}}