Open-metadata OpenMetadata up to 1.x Saml Login Servlet callback redirect

Summaryinfo

A vulnerability categorized as problematic has been discovered in Open-metadata OpenMetadata up to 1.x. The impacted element is an unknown function of the component Saml Login Servlet. The manipulation of the argument callback results in redirect. This vulnerability is identified as CVE-2026-81029. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Open-metadata OpenMetadata up to 1.x. Affected is an unknown functionality of the component Saml Login Servlet. The manipulation of the argument callback with an unknown input leads to a redirect vulnerability. CWE is classifying the issue as CWE-601. A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks. This is going to have an impact on integrity. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-81029 since 08/26/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1204.001 by the MITRE ATT&CK project.

Upgrading to version 2.0.0 eliminates this vulnerability.

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Productinfo

Vendor

• Open-metadata

Name

• OpenMetadata

Version

• 1.x

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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