OpenMetadata accepts a caller-supplied post-authentication redirect target and appends the issued token to it. SamlLoginServlet reads the callback request parameter and stores it in the HTTP session without comparing it against any configured or registered destination, and the assertion consumer servlet later formats that stored value into a URL carrying the freshly issued JWT together with the account's email and name before sending the redirect. The OIDC and OAuth2 handler follows the same pattern with its own redirect parameter and the issued identity token. A request naming a destination the attacker controls therefore causes the server to deliver a valid token for whoever completes the login to that destination. Because the token authenticates API calls as that account, a user who follows such a link and authenticates hands over control of their account. Version 2.0.0 removes the caller-supplied callback parameter; no 1.x release validates it.
Metrics
Affected Vendors & Products
Advisories
No advisories yet.
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Wed, 26 Aug 2026 16:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | OpenMetadata accepts a caller-supplied post-authentication redirect target and appends the issued token to it. SamlLoginServlet reads the callback request parameter and stores it in the HTTP session without comparing it against any configured or registered destination, and the assertion consumer servlet later formats that stored value into a URL carrying the freshly issued JWT together with the account's email and name before sending the redirect. The OIDC and OAuth2 handler follows the same pattern with its own redirect parameter and the issued identity token. A request naming a destination the attacker controls therefore causes the server to deliver a valid token for whoever completes the login to that destination. Because the token authenticates API calls as that account, a user who follows such a link and authenticates hands over control of their account. Version 2.0.0 removes the caller-supplied callback parameter; no 1.x release validates it. | |
| Title | OpenMetadata before 2.0.0 JWT Disclosure via Unvalidated SAML and OIDC Redirect URI | |
| First Time appeared |
Open-metadata
Open-metadata openmetadata |
|
| Weaknesses | CWE-601 | |
| CPEs | cpe:2.3:a:open-metadata:openmetadata:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Open-metadata
Open-metadata openmetadata |
|
| References |
|
|
| Metrics |
cvssV3_1
|
Projects
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MITRE
Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-08-26T15:44:57.988Z
Reserved: 2026-08-26T15:23:05.673Z
Link: CVE-2026-81029
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-08-26T16:16:45.550
Modified: 2026-08-26T16:16:45.550
Link: CVE-2026-81029
Redhat
No data.
OpenCVE Enrichment
No data.
Weaknesses