CVE-2026-21579

{"id": "CVE-2026-21579", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-21579", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-22T18:33:05.618013Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 3.9}], "cvssMetricV40": [{"type": "Secondary", "source": "security@atlassian.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 8.2, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "HIGH", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "security@atlassian.com", "affectedData": [{"vendor": "Atlassian", "product": "Confluence Data Center", "versions": [{"status": "affected", "version": "10.2.0 to 10.2.13"}, {"status": "affected", "version": "10.1.0 to 10.1.2"}, {"status": "affected", "version": "10.0.2 to 10.0.3"}, {"status": "affected", "version": "9.2.0 to 9.2.21"}, {"status": "affected", "version": "9.1.0 to 9.1.1"}, {"status": "affected", "version": "9.0.1 to 9.0.3"}, {"status": "affected", "version": "8.9.5 to 8.9.8"}, {"status": "affected", "version": "8.5.14 to 8.5.31"}, {"status": "affected", "version": "7.19.26 to 7.19.30"}, {"status": "unaffected", "version": "10.2.14"}, {"status": "unaffected", "version": "9.2.22"}]}]}], "published": "2026-07-21T18:16:57.487", "references": [{"url": "https://confluence.atlassian.com/pages/viewpage.action?pageId=1821999345", "tags": ["Vendor Advisory"], "source": "security@atlassian.com"}, {"url": "https://jira.atlassian.com/browse/CONFSERVER-104340", "tags": ["Issue Tracking"], "source": "security@atlassian.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-200"}]}], "descriptions": [{"lang": "en", "value": "This High severity Information Disclosure vulnerability was introduced in versions 7.17.0, 7.19.0, 8.5.0, 8.9.0, 9.0.1, 9.1.0, 9.2.0, 10.0.2, 10.1.0, and 10.2.0 of Confluence Data Center.\r\n\r\nThis Information Disclosure vulnerability, with a CVSS Score of 8.2, allows an unauthenticated attacker to view sensitive information via an Information Disclosure vulnerability.\r\n\r\nAtlassian recommends that Confluence Data Center customers upgrade to latest version, if you are unable to do so, upgrade your instance to one of the specified supported fixed versions:\r\n Confluence Data Center 9.2: Upgrade to a release greater than or equal to 9.2.22\r\n\r\n Confluence Data Center 10.2: Upgrade to a release greater than or equal to 10.2.14\r\n\r\nSee the release notes ([https://confluence.atlassian.com/doc/confluence-release-notes-327.html]). You can download the latest version of Confluence Data Center from the download center ([https://www.atlassian.com/software/confluence/download-archives]).\r\n\r\nThis vulnerability was reported via our Atlassian (Internal) program."}, {"lang": "es", "value": "Esta vulnerabilidad de revelaci\u00f3n de informaci\u00f3n de alta gravedad fue introducida en las versiones 7.17.0, 7.19.0, 8.5.0, 8.9.0, 9.0.1, 9.1.0, 9.2.0, 10.0.2, 10.1.0 y 10.2.0 de Confluence Data Center.\n\nEsta vulnerabilidad de revelaci\u00f3n de informaci\u00f3n, con una puntuaci\u00f3n CVSS de 8.2, permite a un atacante no autenticado ver informaci\u00f3n sensible a trav\u00e9s de una vulnerabilidad de revelaci\u00f3n de informaci\u00f3n.\n\nAtlassian recomienda que los clientes de Confluence Data Center actualicen a la \u00faltima versi\u00f3n; si no puede hacerlo, actualice su instancia a una de las versiones fijas compatibles especificadas:\n Confluence Data Center 9.2: Actualice a una versi\u00f3n mayor o igual a 9.2.22\n\n Confluence Data Center 10.2: Actualice a una versi\u00f3n mayor o igual a 10.2.14\n\nConsulte las notas de la versi\u00f3n ([https://confluence.atlassian.com/doc/confluence-release-notes-327.html]). Puede descargar la \u00faltima versi\u00f3n de Confluence Data Center desde el centro de descargas ([https://www.atlassian.com/software/confluence/download-archives]).\n\nEsta vulnerabilidad fue reportada a trav\u00e9s de nuestro programa Atlassian (Interno)."}], "lastModified": "2026-10-24T19:10:00.127", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2EF4BFFB-C55A-43F0-829E-1F49640FC1ED", "versionEndIncluding": "7.19.30", "versionStartIncluding": "7.19.26"}, {"criteria": "cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BC7D57F9-27E4-4BB6-9F95-EC68DAD313FF", "versionEndIncluding": "8.5.31", "versionStartIncluding": "8.5.14"}, {"criteria": "cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4017A32A-6F7B-42AB-A809-0DD7083FE831", "versionEndIncluding": "8.9.8", "versionStartIncluding": "8.9.5"}, {"criteria": "cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5D96FA93-543E-4520-86FC-11CC5F4F0E67", "versionEndIncluding": "9.0.3", "versionStartIncluding": "9.0.1"}, {"criteria": "cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AABE6E52-C62D-405D-AFA9-2D915054E37B", "versionEndIncluding": "9.1.1", "versionStartIncluding": "9.1.0"}, {"criteria": "cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "82CBB3F6-0619-4EDC-85A6-503B410F3C0D", "versionEndIncluding": "9.2.21", "versionStartIncluding": "9.2.0"}, {"criteria": "cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FFBCB72C-3928-4912-BEB5-AF347389E722", "versionEndIncluding": "10.0.3", "versionStartIncluding": "10.0.2"}, {"criteria": "cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4D091175-B702-4810-89C4-CD57AC9A691A", "versionEndIncluding": "10.1.2", "versionStartIncluding": "10.1.0"}, {"criteria": "cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "95990BE3-CC94-4393-8B94-AD2B546B82FF", "versionEndIncluding": "10.2.13", "versionStartIncluding": "10.2.0"}], "operator": "OR"}]}], "sourceIdentifier": "security@atlassian.com"}