Medium severity6.5NVD Advisory· Published Mar 12, 2026· Updated Jun 17, 2026
CVE-2026-32245
CVE-2026-32245
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/steveiliop56/tinyauthGo | < 1.0.1-20260311144920-9eb2d33064b7 | 1.0.1-20260311144920-9eb2d33064b7 |
Affected products
5- ghsa-coords3 versionspkg:golang/github.com/steveiliop56/tinyauthpkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2016.0
< 1.0.1-20260311144920-9eb2d33064b7+ 2 more
- (no CPE)range: < 1.0.1-20260311144920-9eb2d33064b7
- (no CPE)range: < 0.0.20260317T205859-150000.1.152.1
- (no CPE)range: < 0.0.20260723T184607-160000.1.1
- steveiliop56/tinyauthv5Range: < 5.0.3
Patches
Vulnerability mechanics
References
6- github.com/steveiliop56/tinyauth/commit/b2a1bfb1f532e87f205fa3afa3fc9f148c53ab89nvdPatchWEB
- github.com/steveiliop56/tinyauth/security/advisories/GHSA-xg2q-62g2-cvcmnvdExploitThird Party AdvisoryWEB
- github.com/advisories/GHSA-xg2q-62g2-cvcmghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-32245ghsaADVISORY
- github.com/steveiliop56/tinyauth/releases/tag/v5.0.3nvdRelease NotesWEB
- pkg.go.dev/vuln/GO-2026-4689ghsaWEB
News mentions
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