CVE-2026-81029Public exploitNetwork attack vector

Unauthenticated account takeover via unvalidated authentication redirects

Published Aug 26, 2026 · Updated Aug 26, 2026

Open redirect in OpenMetadata before 2.0.0 allows remote attackers to steal an authenticating user's JWT through a crafted login URL. SamlLoginServlet and AuthenticationCodeFlowHandler store caller-controlled callback or redirectUri values without validation, and completion handlers append the issued token before redirecting. Exploitation requires a user to follow the crafted URL and complete SAML, OIDC, or OAuth2 authentication, after which the token grants API access as that account.

CVSS severity8.1
High
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Open redirect in OpenMetadata before 2.0.0 allows remote attackers to steal an authenticating user's JWT through a crafted login URL. SamlLoginServlet and AuthenticationCodeFlowHandler store caller-controlled callback or redirectUri values without validation, and completion handlers append the issued token before redirecting. Exploitation requires a user to follow the crafted URL and complete SAML, OIDC, or OAuth2 authentication, after which the token grants API access as that account.

The record

CVE
CVE-2026-81029
Published
Aug 26, 2026
Updated
Aug 26, 2026
Vendor
OpenMetadata
Product
OpenMetadata
Classifications
CWE-601, T1528
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenMetadata · OpenMetadataversion=0 <2.0.0

Published CVSS scores

8.1VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-601URL Redirection to Untrusted Site ('Open Redirect')
T1528Steal Application Access Token

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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