CVE-2026-32246
CVE-2026-32246 is a high-severity vulnerability in Tinyauth with a CVSS 3.x base score of 8.5. 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-287.
Key facts
- Severity: High (CVSS 3.x base score 8.5)
- EPSS exploit prediction: 0% (19th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-11681
- Weakness: CWE-287
- Affected product: Tinyauth
- Published:
- Last modified:
Description
Tinyauth is an authentication and authorization server. Prior to 5.0.3, the OIDC authorization endpoint allows users with a TOTP-pending session (password verified, TOTP not yet completed) to obtain authorization codes. An attacker who knows a user's password but not their TOTP secret can obtain valid OIDC tokens, completely bypassing the second factor. This vulnerability is fixed in 5.0.3.
Frequently asked questions
- What is CVE-2026-32246?
- Tinyauth is an authentication and authorization server. Prior to 5.0.3, the OIDC authorization endpoint allows users with a TOTP-pending session (password verified, TOTP not yet completed) to obtain authorization codes. An attacker who knows a user's password but not their TOTP secret can obtain valid OIDC tokens, completely bypassing the second factor. This vulnerability is fixed in 5.0.3.
- How severe is CVE-2026-32246?
- CVE-2026-32246 has a CVSS 3.x base score of 8.5, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity high, and availability none.
- Is CVE-2026-32246 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-32246?
- CVE-2026-32246 affects Tinyauth. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-32246?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2026-32246 have an EU (EUVD) identifier?
- Yes. CVE-2026-32246 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-11681.
- When was CVE-2026-32246 published?
- CVE-2026-32246 was published on 2026-03-12 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:tinyauth:tinyauth:*:*:*:*:*:*:*:*
More vulnerabilities in Tinyauth
- CVE-2026-33544 — High (CVSS 7.7): Tinyauth is an authentication and authorization server. Prior to version 5.0.5, all three OAuth service implementations…
- CVE-2026-32245 — Medium (CVSS 6.5): Tinyauth is an authentication and authorization server. Prior to 5.0.3, the OIDC token endpoint does not verify that…
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