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Affected Vendors & Products
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Solution
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Workaround
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Mon, 19 Oct 2026 15:30:00 +0000
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ssvc
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Mon, 19 Oct 2026 13:30:00 +0000
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| Description | @fastify/oauth2 is a Fastify wrapper for OAuth2 login flows. In versions 7.2.0 through 8.3.1, the state and code-verifier cookies are set without a Path attribute at a login route with two or more path segments, while the clearing step at the OAuth callback writes them with a root path, so the original cookies survive the callback and the documented single-use guarantee for the state value does not hold. A state value an attacker learns stays valid for the rest of the browser session, letting the attacker drive their own authorization flow in the victim's browser and sign the victim in to the attacker's account (login CSRF). The issue is fixed in @fastify/oauth2 8.3.2, and users should upgrade to 8.3.2 or later. As a workaround, set an explicit cookie path so the set and the clear name the same cookie. | |
| Title | @fastify/oauth2 vulnerable to Login CSRF via OAuth state cookie not cleared after callback | |
| Weaknesses | CWE-352 CWE-459 CWE-613 |
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| Metrics |
cvssV3_1
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Projects
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Status: PUBLISHED
Assigner: openjs
Published:
Updated: 2026-10-19T14:26:45.991Z
Reserved: 2026-10-13T14:13:40.147Z
Link: CVE-2026-110008
Updated: 2026-10-19T14:26:41.667Z
Status : Awaiting Analysis
Published: 2026-10-19T14:16:57.527
Modified: 2026-10-19T21:13:39.973
Link: CVE-2026-110008
No data.
OpenCVE Enrichment
Updated: 2026-10-19T16:00:15Z