{"schema_version":"1","data":[{"id":3520,"advisory_id":"2b183243-ab62-41b9-8633-fc60c43e01e0","revision":1,"source_id":"core-kev","source_url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-26084","source_published_at":"2021-11-03T00:00:00+00:00","published_at":"2026-10-24T21:36:24.814213+00:00","extraction_method":"structured","technologies":["confluence-server-and-data-center","core-kev"],"cve_ids":["CVE-2021-26084"],"event_types":["advisory"],"payload":{"kind":"advisory","title":"Atlassian Confluence Server and Data Center Object-Graph Navigation Language (OGNL) Injection Vulnerability","summary":"Atlassian Confluence Server and Data Server contain an Object-Graph Navigation Language (OGNL) injection vulnerability that may allow an unauthenticated attacker to execute code. CISA required action: Apply updates per vendor instructions.","evidence":"kev:CVE-2021-26084","products":[{"name":{"value":"Confluence Server and Data Center","evidence":"/product"},"prerequisites":[],"fixed_versions":[],"affected_versions":[]}],"severity":"unknown","structured":{"id":"CVE-2021-26084","aliases":["CVE-2021-26084"],"affected":[],"modified":"2021-11-03T00:00:00.000Z","provider":"kev","references":["https://www.cisa.gov/known-exploited-vulnerabilities-catalog"],"exploitation":{"cwes":["CWE-917"],"cveID":"CVE-2021-26084","notes":"https://nvd.nist.gov/vuln/detail/CVE-2021-26084","dueDate":"2021-11-17","product":"Confluence Server and Data Center","dateAdded":"2021-11-03","vendorProject":"Atlassian","requiredAction":"Apply updates per vendor instructions.","known_exploited":true,"shortDescription":"Atlassian Confluence Server and Data Server contain an Object-Graph Navigation Language (OGNL) injection vulnerability that may allow an unauthenticated attacker to execute code.","vulnerabilityName":"Atlassian Confluence Server and Data Center Object-Graph Navigation Language (OGNL) Injection Vulnerability","knownRansomwareCampaignUse":"Known"}},"related_cves":[{"value":"CVE-2021-26084","evidence":"/cveID"}],"security_relevant":true,"severity_evidence":null}}],"next_after":3520,"next_before":3520}