CVE-2026-117499 (GCVE-0-2026-117499)

Vulnerability from cvelistv5 – Published: 2026-10-27 11:19 – Updated: 2026-10-27 11:19
VLAI
Title
@fastify/session vulnerable to session revocation bypass via a logout race condition
Summary
@fastify/session is a session plugin for Fastify. In all releases before 11.1.6, with the default rolling session behavior, a request that restored a session before a logout could save its own copy after another request had completed the session destroy call, recreating the destroyed session identifier with its authenticated data. An attacker who already holds a victim's valid signed session cookie and keeps a request in flight across the logout can replay that cookie to restore the session after it was meant to be revoked, without any cookie theft or signature forgery. The issue is fixed in @fastify/session 11.1.6, which adds a per session generation marker and a conditional store write so a session restored before a logout or regeneration cannot recreate or overwrite the current entry, and users should upgrade to 11.1.6 or later. There is no workaround, and custom session stores must implement the new conditional write.
Severity
3.7 (Low)
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N
CWE
  • CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
  • CWE-613 - Insufficient Session Expiration
Assigner
openjs CNA under the redhat root
CNA scorecard C 65/100 over 119 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
@fastify/session @fastify/session Affected: 0 , < 11.1.6 (semver)
Unaffected: 11.1.6 (semver)
guessed Create a notification for this product.
Credits
koyokr BlueN0r mcollina UlisesGascon
Show details on NVD website
To clipboard 

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