@workos/authkit-session: Open Redirect via state-derived redirect target_CVE-2026-42565

4.3 / 10

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Description

@workos/authkit-session is a toolkit for building WorkOS AuthKit framework integrations. Prior to 0.5.1, an open redirect vulnerability exists in AuthService.handleCallback due to insufficient validation of the returnPathname value derived from the OAuth state parameter. The state parameter is round-tripped through the identity provider (IdP) and can be influenced by an attacker. The handleCallback function decodes and returns returnPathname without enforcing restrictions on origin or scheme. As a result, attacker-controlled values may be returned to the application. If this value is used directly in a redirect, it may cause the user to be redirected to an external, attacker-controlled site. This vulnerability is fixed in 0.5.1.

Basic Information

ID CVE-2026-42565

Source GitHub_M

Published May 11, 2026 at 19:01

Affected Product

Vendor workos

Product authkit-session

Version < 0.5.1

Affected Versions workos authkit-session < 0.5.1

CWE Classification

CWE-601

References

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    "published": "2026-05-11T19:01:28.340Z",
    "modified": "2026-05-11T19:01:28.340Z",
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