SB20260917251 - Uncaught Exception in Fastify

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Main Vulnerability Database SB20260917251

SB20260917251 - Uncaught Exception in Fastify

Published: September 17, 2026

Security Bulletin ID SB20260917251
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) Uncaught Exception (CVE-ID: CVE-2026-92081)

CWE-ID: CWE-248 - Uncaught Exception

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 a remote attacker to cause a denial of service.

The vulnerability exists due to an uncaught exception in Fastify's HTTP/2 response trailer handling when serializing a response with a registered trailer. A remote attacker can send an HTTP/2 request to a route that registers a response trailer to cause a denial of service.

Applications are affected only when HTTP/2 is enabled and at least one route registers a trailer; HTTP/1.x responses are not affected.


Remediation

Install update from vendor's website.

References