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Fri, 13 Nov 2026 09:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Fleet before 4.86.2 contains a denial of service vulnerability that allows unauthenticated attackers to exhaust server memory through quadratic XML canonicalization of unsigned SAML responses. Attackers can send a single crafted SAML response with deeply nested elements declaring new namespace prefixes to POST /api/v1/fleet/sso/callback, crashing the Fleet server. | |
| Title | Fleet before 4.86.2 Unauthenticated DoS via SSO Callback XML Canonicalization | |
| First Time appeared |
Fleetdm
Fleetdm fleet |
|
| Weaknesses | CWE-407 | |
| CPEs | cpe:2.3:a:fleetdm:fleet:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Fleetdm
Fleetdm fleet |
|
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-11-13T09:35:47.679Z
Reserved: 2026-11-10T21:32:21.765Z
Link: CVE-2026-126401
No data.
Status : Received
Published: 2026-11-13T10:17:44.597
Modified: 2026-11-13T10:17:44.597
Link: CVE-2026-126401
No data.
OpenCVE Enrichment
No data.