{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-06-26T07:12:48.908","vulnerabilities":[{"cve":{"id":"CVE-2020-26276","sourceIdentifier":"security-advisories@github.com","published":"2020-12-17T20:15:13.760","lastModified":"2026-06-17T03:07:58.797","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"Fleet is an open source osquery manager. In Fleet before version 3.5.1, due to issues in Go's standard library XML parsing, a valid SAML response may be mutated by an attacker to modify the trusted document. This can result in allowing unverified logins from a SAML IdP. Users that configure Fleet with SSO login may be vulnerable to this issue. This issue is patched in 3.5.1. The fix was made using https://github.com/mattermost/xml-roundtrip-validator If upgrade to 3.5.1 is not possible, users should disable SSO authentication in Fleet."},{"lang":"es","value":"Fleet es un administrador de osquery de código abierto.&#xa0;En Fleet versiones anteriores a 3.5.1, debido a problemas en el análisis de XML de la biblioteca estándar de Go, una respuesta válida SAML puede ser mutada por un atacante para modificar el documento confiable.&#xa0;Esto puede resultar en permitir inicios de sesión no verificados desde un IdP SAML.&#xa0;Los usuarios que configuran Fleet con inicio de sesión SSO pueden ser vulnerables a este problema.&#xa0;Este problema está parcheado en la versión 3.5.1.&#xa0;La corrección fue realizada usando https://github.com/mattermost/xml-roundtrip-validator si la actualización a la versión 3.5.1 no es posible, los usuarios deben deshabilitar la autenticación SSO en Fleet"}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"fleetdm","product":"fleet","versions":[{"version":"< 3.5.1","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","baseScore":10.0,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":6.0},{"source":"nvd@nist.gov","type":"Primary","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}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:M/Au:N/C:P/I:P/A:P","baseScore":6.8,"accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL"},"baseSeverity":"MEDIUM","exploitabilityScore":8.6,"impactScore":6.4,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-290"}]},{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-290"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:fleetdm:fleet:*:*:*:*:*:*:*:*","versionEndExcluding":"3.5.1","matchCriteriaId":"73A23340-9D58-472D-9ADD-4313F6B9C332"}]}]}],"references":[{"url":"https://github.com/fleetdm/fleet/blob/master/CHANGELOG.md#fleet-351-dec-14-2020","source":"security-advisories@github.com","tags":["Release Notes","Third Party Advisory"]},{"url":"https://github.com/fleetdm/fleet/commit/57812a532e5f749c8e18c6f6a652eca65c083607","source":"security-advisories@github.com","tags":["Patch","Third Party Advisory"]},{"url":"https://github.com/fleetdm/fleet/security/advisories/GHSA-w3wf-cfx3-6gcx","source":"security-advisories@github.com","tags":["Third Party Advisory"]},{"url":"https://github.com/mattermost/xml-roundtrip-validator","source":"security-advisories@github.com","tags":["Third Party Advisory"]},{"url":"https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities","source":"security-advisories@github.com","tags":["Not Applicable","Third Party Advisory"]},{"url":"https://github.com/fleetdm/fleet/blob/master/CHANGELOG.md#fleet-351-dec-14-2020","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Release Notes","Third Party Advisory"]},{"url":"https://github.com/fleetdm/fleet/commit/57812a532e5f749c8e18c6f6a652eca65c083607","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Third Party Advisory"]},{"url":"https://github.com/fleetdm/fleet/security/advisories/GHSA-w3wf-cfx3-6gcx","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"]},{"url":"https://github.com/mattermost/xml-roundtrip-validator","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"]},{"url":"https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Not Applicable","Third Party Advisory"]}]}}]}