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Vulnerability details: VCID-sk4t-73s6-rqg9
Vulnerability ID VCID-sk4t-73s6-rqg9
Aliases CVE-2026-44681
GHSA-r95x-qfjj-fjj2
PYSEC-2026-188
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-601 URL Redirection to Untrusted Site ('Open Redirect')
CWE-863 Incorrect Authorization
System Score Found at
cvssv3.1 6.1 https://github.com/authlib/authlib
generic_textual MODERATE https://github.com/authlib/authlib
cvssv3.1 6.1 https://github.com/authlib/authlib/releases/tag/v1.6.12
generic_textual MODERATE https://github.com/authlib/authlib/releases/tag/v1.6.12
cvssv3.1 6.1 https://github.com/authlib/authlib/releases/tag/v1.7.1
generic_textual MODERATE https://github.com/authlib/authlib/releases/tag/v1.7.1
cvssv3.1 6.1 https://github.com/authlib/authlib/security/advisories/GHSA-r95x-qfjj-fjj2
generic_textual MODERATE https://github.com/authlib/authlib/security/advisories/GHSA-r95x-qfjj-fjj2
Reference id Reference type URL
https://github.com/authlib/authlib
https://github.com/authlib/authlib/releases/tag/v1.6.12
https://github.com/authlib/authlib/releases/tag/v1.7.1
https://github.com/authlib/authlib/security/advisories/GHSA-r95x-qfjj-fjj2
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://github.com/authlib/authlib
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://github.com/authlib/authlib/releases/tag/v1.6.12
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://github.com/authlib/authlib/releases/tag/v1.7.1
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://github.com/authlib/authlib/security/advisories/GHSA-r95x-qfjj-fjj2
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none

No EPSS data available for this vulnerability.

Date Actor Action Source VulnerableCode Version
2026-06-04T16:14:39.767956+00:00 Pypa Importer Import https://github.com/pypa/advisory-database/blob/main/vulns/authlib/PYSEC-2026-188.yaml 38.6.0