7.5

CVE-2026-33806

fastify vulnerable to Body Schema Validation Bypass via Leading Space in Content-Type Header

Impact:

Fastify applications using schema.body.content for per-content-type body validation can have validation bypassed entirely by prepending a space to the Content-Type header. The body is still parsed correctly but schema validation is skipped.

This is a regression introduced in fastify >= 5.3.2 by the fix for CVE-2025-32442

Patches:

Upgrade to fastify v5.8.5 or later.

Workarounds:

None. Upgrade to the patched version.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Fastify ≫ Fastify SwPlatformnode.js Version >= 5.3.2 < 5.8.5
VulnDex Vulnerability Enrichment
Diese Information steht angemeldeten Benutzern zur Verfügung. Login Login
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.41% 0.326
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
ce714d77-add3-4f53-aff5-83d477b104bb 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
0b0ca135-0b70-47e7-9f44-1890c2a1c46c 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE-1287 Improper Validation of Specified Type of Input

The product receives input that is expected to be of a certain type, but it does not validate or incorrectly validates that the input is actually of the expected type.

CWE-1289 Improper Validation of Unsafe Equivalence in Input

The product receives an input value that is used as a resource identifier or other type of reference, but it does not validate or incorrectly validates that the input is equivalent to a potentially-unsafe value.

https://cna.openjsf.org/security-advisories.html
Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2458596
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33806.json
https://github.com/fastify/fastify/security/advisories/GHSA-mg2h-6x62-wpwc
Not Applicable
https://access.redhat.com/security/cve/CVE-2026-33806