How severe is CVE-2026-44681?

CVE-2026-44681 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-44681 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-44681?

CVE-2026-44681 primarily affects Authlib. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-44681?

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

Does CVE-2026-44681 have an EU (EUVD) identifier?

Yes. CVE-2026-44681 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-32637.

When was CVE-2026-44681 published?

CVE-2026-44681 was published on 2026-05-27 and last updated on 2026-06-17.

CVE-2026-44681

CVE-2026-44681 is a medium-severity vulnerability in Authlib with a CVSS 3.x base score of 6.1. 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-601.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-32637
Weakness: CWE-601
Affected product: Authlib
Published: 2026-05-27
Last modified: 2026-06-17

Description

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.6.12 and 1.7.1, an unauthenticated open redirect in Authlib's OpenIDImplicitGrant and OpenIDHybridGrant authorization endpoint lets a remote attacker cause the authorization server to issue an HTTP 302 to an attacker-chosen URL by submitting an authorization request that omits the openid scope. This vulnerability is fixed in 1.6.12 and 1.7.1.

Frequently asked questions

What is CVE-2026-44681?: Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.6.12 and 1.7.1, an unauthenticated open redirect in Authlib's OpenIDImplicitGrant and OpenIDHybridGrant authorization endpoint lets a remote attacker cause the authorization server to issue an HTTP 302 to an attacker-chosen URL by submitting an authorization request that omits the openid scope. This vulnerability is fixed in 1.6.12 and 1.7.1.
How severe is CVE-2026-44681?: CVE-2026-44681 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-44681 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-44681?: CVE-2026-44681 primarily affects Authlib. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-44681?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-44681 have an EU (EUVD) identifier?: Yes. CVE-2026-44681 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-32637.
When was CVE-2026-44681 published?: CVE-2026-44681 was published on 2026-05-27 and last updated on 2026-06-17.

References

https://github.com/authlib/authlib/security/advisories/GHSA-r95x-qfjj-fjj2

Affected products (2)

cpe:2.3:a:authlib:authlib:*:*:*:*:*:*:*:*
cpe:2.3:a:authlib:authlib:1.7.0:*:*:*:*:*:*:*

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