{"api_version":"1","generated_at":"2026-07-24T18:54:24+00:00","cve":"CVE-2026-16358","urls":{"html":"https://cve.report/CVE-2026-16358","api":"https://cve.report/api/cve/CVE-2026-16358.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-16358","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-16358"},"summary":{"title":"Site isolation issue in the Graphics: WebRender component","description":"Site isolation issue in the Graphics: WebRender component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.","state":"PUBLISHED","assigner":"mozilla","published_at":"2026-07-21 13:17:04","updated_at":"2026-07-24 15:29:32"},"problem_types":["CWE-346","CWE-346 CWE-346 Origin Validation Error"],"metrics":[{"version":"3.1","source":"ADP","type":"DECLARED","score":"9.8","severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","data":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}},{"version":"3.1","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","score":"9.8","severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}}],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2040119","name":"https://bugzilla.mozilla.org/show_bug.cgi?id=2040119","refsource":"security@mozilla.org","tags":["Permissions Required"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-72/","name":"https://www.mozilla.org/security/advisories/mfsa2026-72/","refsource":"security@mozilla.org","tags":["Vendor Advisory"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-70/","name":"https://www.mozilla.org/security/advisories/mfsa2026-70/","refsource":"security@mozilla.org","tags":["Vendor Advisory"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-71/","name":"https://www.mozilla.org/security/advisories/mfsa2026-71/","refsource":"security@mozilla.org","tags":["Vendor Advisory"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-69/","name":"https://www.mozilla.org/security/advisories/mfsa2026-69/","refsource":"security@mozilla.org","tags":["Vendor Advisory"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-68/","name":"https://www.mozilla.org/security/advisories/mfsa2026-68/","refsource":"security@mozilla.org","tags":["Vendor Advisory"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-16358","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-16358","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Mozilla","product":"Firefox","version":"unaffected 115.38 115.* rpm","platforms":[]},{"source":"CNA","vendor":"Mozilla","product":"Firefox","version":"unaffected 140.13 140.* rpm","platforms":[]},{"source":"CNA","vendor":"Mozilla","product":"Firefox","version":"unaffected 153 * rpm","platforms":[]},{"source":"CNA","vendor":"Mozilla","product":"Thunderbird","version":"unaffected 140.13 140.* rpm","platforms":[]},{"source":"CNA","vendor":"Mozilla","product":"Thunderbird","version":"unaffected 153 * rpm","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[{"source":"CNA","value":"Hcamael","lang":"en"}],"nvd_cpes":[{"cve_year":"2026","cve_id":"16358","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"mozilla","cpe5":"firefox","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"-","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2026","cve_id":"16358","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"mozilla","cpe5":"firefox","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"esr","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"16358","cve":"CVE-2026-16358","epss":"0.001520000","percentile":"0.048310000","score_date":"2026-07-22","updated_at":"2026-07-23 00:09:29"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}},{"other":{"content":{"id":"CVE-2026-16358","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","timestamp":"2026-07-22T17:09:07.744606Z","version":"2.0.3"},"type":"ssvc"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-346","description":"CWE-346 Origin Validation Error","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-07-22T17:29:50.162Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"product":"Firefox","vendor":"Mozilla","versions":[{"lessThanOrEqual":"115.*","status":"unaffected","version":"115.38","versionType":"rpm"},{"lessThanOrEqual":"140.*","status":"unaffected","version":"140.13","versionType":"rpm"},{"lessThanOrEqual":"*","status":"unaffected","version":"153","versionType":"rpm"}]},{"product":"Thunderbird","vendor":"Mozilla","versions":[{"lessThanOrEqual":"140.*","status":"unaffected","version":"140.13","versionType":"rpm"},{"lessThanOrEqual":"*","status":"unaffected","version":"153","versionType":"rpm"}]}],"credits":[{"lang":"en","value":"Hcamael"}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Site isolation issue in the Graphics: WebRender component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13."}],"value":"Site isolation issue in the Graphics: WebRender component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13."}],"providerMetadata":{"dateUpdated":"2026-07-22T19:18:42.429Z","orgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","shortName":"mozilla"},"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2040119"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-68/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-69/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-70/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-71/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-72/"}],"title":"Site isolation issue in the Graphics: WebRender component"}},"cveMetadata":{"assignerOrgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","assignerShortName":"mozilla","cveId":"CVE-2026-16358","datePublished":"2026-07-21T12:37:54.669Z","dateReserved":"2026-07-20T21:56:05.445Z","dateUpdated":"2026-07-22T19:18:42.429Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-21 13:17:04","lastModifiedDate":"2026-07-24 15:29:32","problem_types":["CWE-346","CWE-346 CWE-346 Origin Validation Error"],"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:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":5.9}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-07-22T17:09:07.744606Z","id":"CVE-2026-16358","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*","versionEndExcluding":"115.38.0","matchCriteriaId":"D9407046-1F52-4289-9A12-2A4730295A9F"},{"vulnerable":true,"criteria":"cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*","versionEndExcluding":"153.0.0","matchCriteriaId":"5DB4AF59-87C2-4FC4-896D-02879D6F8E6B"},{"vulnerable":true,"criteria":"cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*","versionStartIncluding":"128.1.0","versionEndExcluding":"140.13.0","matchCriteriaId":"E5063988-0B86-4C26-8676-E98376899B70"},{"vulnerable":true,"criteria":"cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*","versionEndExcluding":"140.13.0","matchCriteriaId":"9F5CEA4A-31D8-46F6-B259-0DFF56BD8F1D"},{"vulnerable":true,"criteria":"cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*","versionStartIncluding":"141.0","versionEndExcluding":"153.0","matchCriteriaId":"B9C46740-CFEC-4FBB-8461-46E26518EE59"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"16358","Ordinal":"1","Title":"Site isolation issue in the Graphics: WebRender component","CVE":"CVE-2026-16358","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"16358","Ordinal":"1","NoteData":"Site isolation issue in the Graphics: WebRender component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.","Type":"Description","Title":"Site isolation issue in the Graphics: WebRender component"}]}}}