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TI-2026-39003 Aliases CVE-2026-54072GHSA-h29v-hj44-q8cv

Authorizer: Unvalidated redirect_uri in /authorize leaks OAuth2 tokens to attacker-controlled URL

Priority HIGH 75CWE-601Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Spoofing
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-601.

Summary

Authorizer is an open-source, self-hostable authentication and authorization server. Prior to version 2.2.1, the `/authorize` endpoint accepts any `redirect_uri` without validating it against `AllowedOrigins`. When `response_type=token` or `response_type=id_token`, the server appends `access_token`, `id_token`, and `refresh_token` as query parameters and issues a 302 redirect to the attacker-supplied URL. An unauthenticated attacker can obtain the required `client_id` from the public `/graphql?query={meta{client_id}}` endpoint. A partial fix was applied in v2.0.1 to other handlers (`oauth_login`, `verify_email`, `magic_link_login`, `forgot_password`, `invite_members`, `oauth_callback`) but `/authorize` was not included. Version 2.2.1 contains a more complete fix.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00463 40th percentileScored 2026-11-07
Fix Fixed authorizer (authorizerdev): 2.2.1github.com/authorizerdev/authorizer (Go): 0.0.0-20260409051328-bd3f5baf6d3d

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
authorizerdevauthorizerbefore 2.2.12.2.1Patch availableCNA
—github.com/authorizerdev/authorizer (Go)before 0.0.0-20260409051328-bd3f5baf6d3d0.0.0-20260409051328-bd3f5baf6d3dPatch availableGHSA-h29v-hj44-q8cv
  • authorizer Vendorauthorizerdev Affected before 2.2.1 Fixed in 2.2.1 Patch available CNA
  • github.com/authorizerdev/authorizer (Go) Vendor— Affected before 0.0.0-20260409051328-bd3f5baf6d3d Fixed in 0.0.0-20260409051328-bd3f5baf6d3d Patch available GHSA-h29v-hj44-q8cv

Remediation

  • Fix · CNA authorizer (authorizerdev) Fixed in 2.2.1
  • Fix · GHSA-h29v-hj44-q8cv github.com/authorizerdev/authorizer (Go) Fixed in 0.0.0-20260409051328-bd3f5baf6d3d Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-54072
  2. 2026-10-03 Alias added: GHSA-h29v-hj44-q8cv

References

Other 2

  • TI-2026-85575 Authorizer Password Reset Poisoning via x-authorizer-url gRPC Metadata CVSS 4.0HIGH 8.6

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences