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CVE-2026-81029— OpenMetadata before 2.0.0 JWT Disclosure via Unvalidated SAML and OIDC Redirect URI

Quick assessment

Affected
open-metadata OpenMetadata
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenMetadata是OpenMetadata组织开源的一个元数据管理平台。 OpenMetadata 2.0.0之前版本存在输入验证错误漏洞，该漏洞源于接受调用者提供的认证后重定向目标，未对重定向目标进行验证，导致服务器将签发的令牌附加到重定向URL，可能导致账户被接管。

CVSS 8.1 · High EPSS 0.55% · P45

Affected Version Matrix 1

VendorProduct Version RangeStatus
open-metadata OpenMetadata < 2.0.0 affected
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I. Basic Information for CVE-2026-81029

Vulnerability Information
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Vulnerability Title
OpenMetadata before 2.0.0 JWT Disclosure via Unvalidated SAML and OIDC Redirect URI
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5
Vulnerability Title
OpenMetadata 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenMetadata是OpenMetadata组织开源的一个元数据管理平台。 OpenMetadata 2.0.0之前版本存在输入验证错误漏洞，该漏洞源于接受调用者提供的认证后重定向目标，未对重定向目标进行验证，导致服务器将签发的令牌附加到重定向URL，可能导致账户被接管。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
open-metadata OpenMetadata 0 ~ 2.0.0 -

II. Public POCs for CVE-2026-81029

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III. Intelligence Information for CVE-2026-81029

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Vendor Advisories for CVE-2026-81029 (1)

Proof of Concept for CVE-2026-81029 (1)

Security Blog Posts for CVE-2026-81029 (2)

IV. Related Vulnerabilities

Same product: OpenMetadata
Same vendor: open-metadata
Same weakness: CWE-601

V. Comments for CVE-2026-81029

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