How severe is CVE-2026-32245?

CVE-2026-32245 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity high, and availability none.

Is CVE-2026-32245 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-32245?

CVE-2026-32245 affects Tinyauth. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-32245?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-32245 have an EU (EUVD) identifier?

Yes. CVE-2026-32245 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-11679.

When was CVE-2026-32245 published?

CVE-2026-32245 was published on 2026-03-12 and last updated on 2026-06-17.

CVE-2026-32245

CVE-2026-32245 is a medium-severity vulnerability in Tinyauth with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-863.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-11679
Weakness: CWE-863
Affected product: Tinyauth
Published: 2026-03-12
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-32245?: 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.
How severe is CVE-2026-32245?: CVE-2026-32245 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity high, and availability none.
Is CVE-2026-32245 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-32245?: CVE-2026-32245 affects Tinyauth. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-32245?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-32245 have an EU (EUVD) identifier?: Yes. CVE-2026-32245 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-11679.
When was CVE-2026-32245 published?: CVE-2026-32245 was published on 2026-03-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:tinyauth:tinyauth:*:*:*:*:*:*:*:*

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