SB20261109168 - Race condition in kin-openapi

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Main Vulnerability Database SB20261109168

SB20261109168 - Race condition in kin-openapi

Published: November 9, 2026

Security Bulletin ID SB20261109168
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Race condition (CVE-ID: N/A)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows an unauthenticated remote attacker to crash a server using kin-openapi, causing denial of service.

The vulnerability exists due to unsynchronized mutation of shared schema default objects in kin-openapi's request validator when default insertion is enabled and nested defaults require filling. An unauthenticated remote attacker can send concurrent valid requests omitting those properties immediately after the specification is loaded, triggering a race that terminates the entire server process.


Remediation

Install update from vendor's website.

References