CVEvulnerability
CVE-2026-25223
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2026-02-03
- Last modified
- 2026-07-15
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- CVSS 3.1 (0b0ca135-0b70-47e7-9f44-1890c2a1c46c)
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- Weaknesses
- CWE-179, CWE-436
Description
Fastify is a fast and low overhead web framework, for Node.js. Prior to version 5.7.2, a validation bypass vulnerability exists in Fastify where request body validation schemas specified by Content-Type can be completely circumvented. By appending a tab character (\t) followed by arbitrary content to the Content-Type header, attackers can bypass body validation while the server still processes the body as the original content type. This issue has been patched in version 5.7.2.
Affected configurations
• fastify fastify (< 5.7.2)
Related
References
- https://fastify.dev/docs/latest/Reference/Validation-and-Serialization Product, Technical Description
- https://github.com/fastify/fastify/blob/759e9787b5669abf953068e42a17bffba7521348/lib/content-type-parser.js#L125 Product
- https://github.com/fastify/fastify/blob/759e9787b5669abf953068e42a17bffba7521348/lib/validation.js#L272 Product
- https://github.com/fastify/fastify/commit/32d7b6add39ddf082d92579a58bea7018c5ac821 Patch
- https://github.com/fastify/fastify/security/advisories/GHSA-jx2c-rxcm-jvmq Mitigation, Vendor Advisory
- https://hackerone.com/reports/3464114 Permissions Required
- https://access.redhat.com/errata/RHSA-2026:10184 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:5807 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:6192 access.redhat.com
- https://access.redhat.com/security/cve/CVE-2026-25223 access.redhat.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2436560 bugzilla.redhat.com
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-25223.json security.access.redhat.com