Upstream information
Description
Tinyauth is an authentication and authorization server. Prior to 5.0.3, the OIDC token endpoint does not verify that the client exchanging an authorization code is the same client the code was issued to. A malicious OIDC client operator can exchange another client's authorization code using their own client credentials, obtaining tokens for users who never authorized their application. This violates RFC 6749 Section 4.1.3. This vulnerability is fixed in 5.0.3.SUSE information
Overall state of this security issue: Resolved
This issue is currently rated as having moderate severity.
| CVSS detail | CNA (GitHub) | National Vulnerability Database |
|---|---|---|
| Base Score | 6.5 | 6.5 |
| Vector | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:N | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N |
| Attack Vector | Network | Network |
| Attack Complexity | High | High |
| Privileges Required | Low | None |
| User Interaction | Required | None |
| Scope | Changed | Unchanged |
| Confidentiality Impact | Low | Low |
| Integrity Impact | High | High |
| Availability Impact | None | None |
| CVSSv3 Version | 3.1 | 3.1 |
SUSE Security Advisories:
- SUSE-SU-2026:1042-1, published 2026-03-25T15:06:58Z
List of released packages
| Product(s) | Fixed package version(s) | References |
|---|
SUSE Timeline for this CVE
CVE page created: Thu Mar 12 22:03:30 2026CVE page last modified: Thu Mar 26 01:46:33 2026