CVE-2026-54072 json
Authorizer: Unvalidated redirect_uri in /authorize leaks OAuth2 tokens to attacker-controlled URL
published 2026-07-10 3 mo ago modified 2026-09-30 39 d ago also GHSA-h29v-hj44-q8cv , GO-2026-5959 , EUVD-2026-76187
- cvss
- 9.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 40%
- public exploits
- 0
- none known
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.
Patch / fix
- go github.com/authorizerdev/authorizer 0.0.0-20260409051328-bd3f5baf6d3d
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 54 d ago
Exploit prediction
0.46% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/authorizerdev/authorizer/security/advisories/GHSA-h29v-hj44-q8cv referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N |
| GitHub | 3.1 | 9.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/authorizerdev/authorizer | <0.0.0-20260409051328-bd3f5baf6d3d |
0.0.0-20260409051328-bd3f5baf6d3d |
Affected products
- authorizerdev authorizer
Classification
- Weakness
-
- CWE-601 URL Redirection to Untrusted Site
References
-
github.com
/authorizerdev/authorizer/security/advisories/GHSA-h29v-hj44-q8cv
exploit, web, advisory
-
github.com
/authorizerdev/authorizer
package
Sources
- CVE List CVE-2026-54072
- GitHub Advisory GHSA-h29v-hj44-q8cv
- NVD CVE-2026-54072
- OSV GO-2026-5959
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