CVE-2026-32245

Name: CVE-2026-32245
Creator: NVD / NIST
Published: 2026-03-12T19:16:19.413+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.25%

Last modified Jun 17, 2026

CVE-2026-32245 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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. EPSS estimates a 0.25% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N

EPSS Probability

0.25%

16.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-863

Affected Software

Vendor	Product	Versions
Tinyauth	Tinyauth	<= 5.0.2

References

https://github.com/steveiliop56/tinyauth/commit/b2a1bfb1f532e87f205fa3afa3fc9f148c53ab89Patch
https://github.com/steveiliop56/tinyauth/releases/tag/v5.0.3Release Notes
https://github.com/steveiliop56/tinyauth/security/advisories/GHSA-xg2q-62g2-cvcmExploit, Third Party Advisory

Timeline

Published: Mar 12, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-32245?

How severe is CVE-2026-32245?

CVE-2026-32245 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.25% probability of exploitation in the next 30 days.

How do I fix CVE-2026-32245?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-32245?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST