{"id":"CVE-2026-16639","state":"PUBLISHED","title":"Internationalization Single Sign-On - Critical - Access bypass - SA-CONTRIB-2026-081","description":"Authentication Bypass Using an Alternate Path or Channel vulnerability in Drupal Internationalization Single Sign-On allows Authentication Bypass. This issue affects Internationalization Single Sign-On versions: from 0.0.0 to 1.8.0.","publishedAt":"2026-08-25T22:22:12.799Z","updatedAt":"2026-08-26T15:23:15.811Z","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":"drupal","products":["Drupal Internationalization Single Sign-On"],"affected":[{"vendor":"Drupal","product":"Internationalization Single Sign-On","versions":[{"version":"0.0.0","status":"affected","lessThan":"1.8.0","versionType":"semver"}],"collectionURL":"https://www.drupal.org/project/i18n_sso","repo":"https://git.drupalcode.org/project/i18n_sso"}],"references":["https://www.drupal.org/sa-contrib-2026-081"],"weaknesses":["CWE-288"],"ingestedAt":"2026-10-29T20:11:00.674Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/16xxx/CVE-2026-16639.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-16639","state":"PUBLISHED","datePublished":"2026-08-25T22:22:12.799Z","dateUpdated":"2026-08-26T15:23:15.811Z","assignerShortName":"drupal","assignerOrgId":"2c85b837-eb8b-40ed-9d74-228c62987387","dateReserved":"2026-07-22T17:06:41.738Z"},"containers":{"cna":{"title":"Internationalization Single Sign-On - Critical - Access bypass - SA-CONTRIB-2026-081","descriptions":[{"lang":"en","value":"Authentication Bypass Using an Alternate Path or Channel vulnerability in Drupal Internationalization Single Sign-On allows Authentication Bypass. This issue affects Internationalization Single Sign-On versions: from 0.0.0 to 1.8.0."}],"affected":[{"vendor":"Drupal","product":"Internationalization Single Sign-On","versions":[{"version":"0.0.0","status":"affected","lessThan":"1.8.0","versionType":"semver"}],"collectionURL":"https://www.drupal.org/project/i18n_sso","repo":"https://git.drupalcode.org/project/i18n_sso"}],"references":[{"url":"https://www.drupal.org/sa-contrib-2026-081"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-288","description":"CWE-288 Authentication Bypass Using an Alternate Path or Channel","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"drupal","orgId":"2c85b837-eb8b-40ed-9d74-228c62987387","dateUpdated":"2026-08-25T22:22:12.799Z"},"datePublic":"2026-07-22T17:53:35.000Z","impacts":[{"capecId":"CAPEC-115","descriptions":[{"lang":"en","value":"CAPEC-115 Authentication Bypass"}]}],"credits":[{"lang":"en","type":"finder","value":"Drew Webber (mcdruid)"},{"lang":"en","type":"remediation developer","value":"Florent Torregrosa (grimreaper)"},{"lang":"en","type":"remediation developer","value":"Drew Webber (mcdruid)"},{"lang":"en","type":"coordinator","value":"Bram Driesen (bramdriesen)"},{"lang":"en","type":"coordinator","value":"Greg Knaddison (greggles)"},{"lang":"en","type":"coordinator","value":"Drew Webber (mcdruid)"},{"lang":"en","type":"coordinator","value":"Juraj Nemec (poker10)"}]},"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":{"timestamp":"2026-08-26T15:22:48.162413Z","id":"CVE-2026-16639","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-26T15:23:15.811Z"}}]}}}