CVE-2026-25223

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Source
https://cve.org/CVERecord?id=CVE-2026-25223
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-25223.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-25223
Aliases
Published
2026-02-03T21:21:40.268Z
Modified
2026-02-05T10:10:36.992057Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
Summary
Fastify's Content-Type header tab character allows body validation bypass
Details

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.

Database specific 
{
    "cwe_ids": [
        "CWE-436"
    ],
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25223.json"
}
References

Affected packages

Git / github.com/fastify/fastify

Affected ranges

Type
GIT
Repo
https://github.com/fastify/fastify
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
e1e4fe75910c36e1b9ebb87026ca16c053a9c1f2

Affected versions

4.*
4.16.0
4.16.1
4.16.2
4.16.3
4.17.0
v0.*
v0.1.0
v0.10.0
v0.11.0
v0.11.1
v0.12.0
v0.13.0
v0.13.1
v0.14.0
v0.14.1
v0.15.0
v0.15.1
v0.15.2
v0.15.3
v0.16.0
v0.17.0
v0.18.0
v0.19.0
v0.19.1
v0.2.0
v0.20.0
v0.20.1
v0.21.0
v0.22.0
v0.23.0
v0.24.0
v0.25.0
v0.25.1
v0.25.2
v0.25.3
v0.26.0
v0.26.1
v0.26.2
v0.27.0
v0.28.0
v0.28.1
v0.28.2
v0.29.0
v0.29.1
v0.29.2
v0.3.0
v0.30.0
v0.30.1
v0.30.2
v0.30.3
v0.31.0
v0.32.0
v0.33.0
v0.34.0
v0.35.0
v0.35.1
v0.35.2
v0.35.3
v0.35.4
v0.35.5
v0.35.6
v0.35.7
v0.36.0
v0.37.0
v0.38.0
v0.39.0
v0.39.1
v0.4.0
v0.40.0
v0.41.0
v0.42.0
v0.43.0
v0.5.0
v0.6.0
v0.7.0
v0.7.1
v0.8.0
v0.9.0
v1.*
v1.0.0
v1.0.0-rc.1
v1.0.0-rc.2
v1.0.0-rc.3
v1.1.0
v1.1.1
v1.10.0
v1.11.0
v1.11.1
v1.11.2
v1.12.0
v1.12.1
v1.13.0
v1.2.0
v1.2.1
v1.3.0
v1.3.1
v1.4.0
v1.5.0
v1.6.0
v1.7.0
v1.8.0
v1.9.0
v2.*
v2.0.0
v2.0.0-rc.0
v2.0.0-rc.1
v2.0.0-rc.2
v2.0.0-rc.3
v2.0.0-rc.4
v2.0.0-rc.5
v2.0.0-rc.6
v2.0.1
v2.1.0
v2.10.0
v2.11.0
v2.12.0
v2.12.1
v2.13.0
v2.13.1
v2.14.0
v2.15.1
v2.2.0
v2.3.0
v2.4.0
v2.4.1
v2.5.0
v2.6.0
v2.7.0
v2.7.1
v2.8.0
v2.9.0
v3.*
v3.0.0
v3.0.0-alpha.1
v3.0.0-rc.1
v3.0.0-rc.2
v3.0.0-rc.3
v3.0.0-rc.4
v3.0.0-rc.5
v3.0.1
v3.0.2
v3.0.3
v3.1.0
v3.1.1
v3.10.0
v3.10.1
v3.11.0
v3.12.0
v3.13.0
v3.14.0
v3.14.1
v3.14.2
v3.15.0
v3.15.1
v3.16.0
v3.16.1
v3.16.2
v3.17.0
v3.18.0
v3.18.1
v3.19.0
v3.19.1
v3.19.2
v3.2.0
v3.2.1
v3.20.0
v3.20.1
v3.20.2
v3.21.0
v3.21.1
v3.21.2
v3.21.3
v3.21.4
v3.21.5
v3.21.6
v3.22.0
v3.22.1
v3.23.0
v3.23.1
v3.24.0
v3.24.1
v3.25.0
v3.25.1
v3.25.2
v3.25.3
v3.26.0
v3.27.0
v3.27.1
v3.27.2
v3.3.0
v3.4.0
v3.4.1
v3.5.0
v3.5.1
v3.6.0
v3.7.0
v3.8.0
v3.9.0
v3.9.1
v3.9.2
v4.*
v4.0.0
v4.0.0-alpha.1
v4.0.0-alpha.2
v4.0.0-alpha.3
v4.0.0-rc.1
v4.0.0-rc.2
v4.0.0-rc.3
v4.0.0-rc.4
v4.0.0-rc.5
v4.0.1
v4.0.2
v4.0.3
v4.1.0
v4.10.0
v4.10.1
v4.10.2
v4.11.0
v4.12.0
v4.13.0
v4.14.0
v4.14.1
v4.15.0
v4.16.0
v4.16.1
v4.16.2
v4.16.3
v4.17.0
v4.18.0
v4.19.0
v4.19.1
v4.19.2
v4.2.0
v4.2.1
v4.20.0
v4.21.0
v4.22.0
v4.22.1
v4.22.2
v4.23.0
v4.23.1
v4.23.2
v4.24.0
v4.24.1
v4.24.2
v4.24.3
v4.25.0
v4.25.1
v4.25.2
v4.26.0
v4.26.1
v4.26.2
v4.27.0
v4.3.0
v4.4.0
v4.5.0
v4.5.1
v4.5.2
v4.5.3
v4.6.0
v4.7.0
v4.8.0
v4.8.1
v4.9.0
v4.9.1
v4.9.2
v5.*
v5.0.0
v5.0.0-alpha.1
v5.0.0-alpha.2
v5.0.0-alpha.4
v5.1.0
v5.2.0
v5.2.1
v5.2.2
v5.3.0
v5.3.1
v5.3.2
v5.3.3
v5.4.0
v5.5.0
v5.6.0
v5.6.1
v5.6.2
v5.7.0
v5.7.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-25223.json"