How severe is CVE-2025-68158?

CVE-2025-68158 has a CVSS 3.x base score of 5.7, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2025-68158 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-68158?

CVE-2025-68158 affects Authlib. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-68158?

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

Does CVE-2025-68158 have an EU (EUVD) identifier?

Yes. CVE-2025-68158 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-206267.

When was CVE-2025-68158 published?

CVE-2025-68158 was published on 2026-01-08 and last updated on 2026-06-17.

CVE-2025-68158

CVE-2025-68158 is a medium-severity vulnerability in Authlib with a CVSS 3.x base score of 5.7. 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-352.

Key facts

Severity: Medium (CVSS 3.x base score 5.7)
EPSS exploit prediction: 0% (15th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-206267
Weakness: CWE-352
Affected product: Authlib
Published: 2026-01-08
Last modified: 2026-06-17

Description

Authlib is a Python library which builds OAuth and OpenID Connect servers. In versions 1.0.0 through 1.6.5, cache-backed state/request-token storage is not tied to the initiating user session, so CSRF is possible for any attacker that has a valid state (easily obtainable via an attacker-initiated authentication flow). When a cache is supplied to the OAuth client registry, FrameworkIntegration.set_state_data writes the entire state blob under _state_{app}_{state}, and get_state_data ignores the caller’s session altogether. This issue has been patched in version 1.6.6.

Frequently asked questions

What is CVE-2025-68158?: Authlib is a Python library which builds OAuth and OpenID Connect servers. In versions 1.0.0 through 1.6.5, cache-backed state/request-token storage is not tied to the initiating user session, so CSRF is possible for any attacker that has a valid state (easily obtainable via an attacker-initiated authentication flow). When a cache is supplied to the OAuth client registry, FrameworkIntegration.set_state_data writes the entire state blob under _state_{app}_{state}, and get_state_data ignores the caller’s session altogether. This issue has been patched in version 1.6.6.
How severe is CVE-2025-68158?: CVE-2025-68158 has a CVSS 3.x base score of 5.7, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2025-68158 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-68158?: CVE-2025-68158 affects Authlib. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-68158?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-68158 have an EU (EUVD) identifier?: Yes. CVE-2025-68158 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-206267.
When was CVE-2025-68158 published?: CVE-2025-68158 was published on 2026-01-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:authlib:authlib:*:*:*:*:*:*:*:*

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