CVE-2020-26276
- Source
- https://cve.org/CVERecord?id=CVE-2020-26276
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-26276.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2020-26276
- Aliases
- Published
- 2020-12-17T20:15:13Z
- Modified
- 2026-10-20T10:54:25Z
- Severity
-
- 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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.
- References
-
- https://github.com/fleetdm/fleet/blob/master/CHANGELOG.md#fleet-351-dec-14-2020
- https://github.com/fleetdm/fleet/security/advisories/GHSA-w3wf-cfx3-6gcx
- https://github.com/mattermost/xml-roundtrip-validator
- https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities
- https://github.com/fleetdm/fleet/commit/57812a532e5f749c8e18c6f6a652eca65c083607
Affected packages
Git / github.com/fleetdm/fleet
Affected ranges
- Type
- GIT
- Repo
- https://github.com/fleetdm/fleet
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixedFixed
- Database specific
-
Show details
{ "extracted_events": [ { "cpe": "cpe:2.3:a:fleetdm:fleet:*:*:*:*:*:*:*:*", "range": [ { "introduced": "0" }, { "fixed": "3.5.1" } ], "source": "CPE_RANGE" }, { "range": [ { "fixed": "57812a532e5f749c8e18c6f6a652eca65c083607" } ], "source": "REFERENCES_COMMIT" } ] }