What’s Vulnerable › Vulnerabilities

CVE-2024-47077: authentik cross-provider token validation problems

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-09-27 · updated 2026-06-17
• Weakness: CWE-863

Description

authentik is an open-source identity provider. Prior to versions 2024.8.3 and 2024.6.5, access tokens issued to one application can be stolen by that application and used to impersonate the user against any other proxy provider. Also, a user can steal an access token they were legitimately issued for one application and use it to access another application that they aren't allowed to access. Anyone who has more than one proxy provider application with different trust domains or different access control is affected. Versions 2024.8.3 and 2024.6.5 fix the issue.

Affected products

• goauthentik authentik: before 2024.6.5; from 2024.8.0 before 2024.8.3 — fixed in 2024.6.5, 2024.8.3

How to fix

Upgrade to a fixed version: goauthentik authentik 2024.6.5, 2024.8.3. Check the vendor advisory for mitigations.

References

• https://github.com/goauthentik/authentik/blob/70b5a214f2e7205572f914aaf68682501b9f5945/authentik/providers/oauth2/views/introspection.py#L42-L51
• https://github.com/goauthentik/authentik/blob/70b5a214f2e7205572f914aaf68682501b9f5945/internal/outpost/proxyv2/application/auth_bearer.go#L30-L36
• https://github.com/goauthentik/authentik/commit/22e586bd8cdc3d1db8a0f18314d76f82371129b2
• https://github.com/goauthentik/authentik/commit/57a31b5dd16d4adce716b9878455c0d6f58155fe
• https://github.com/goauthentik/authentik/security/advisories/GHSA-8gfm-pr6x-pfh9

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