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CVE-2026-3635 Fastify request.protocol and request.host spoofable via X-Forwarded-Proto/Host from untrusted connections when trustProxy uses restrictive trust function

🗓️ 23 Mar 2026 13:53:00Reported by openjsType 
cvelist
 cvelist
🔗 www.cve.org👁 19 Views

Restrictive trustProxy in Fastify allows protocol and host spoofing from untrusted connections via X-Forwarded headers.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-3635
23 Mar 202613:53
attackerkb
Circl
CVE-2026-3635
23 Mar 202614:08
circl
CNNVD
Fastify 安全漏洞
23 Mar 202600:00
cnnvd
CVE
CVE-2026-3635
23 Mar 202613:53
cve
EUVD
EUVD-2026-14431
25 Mar 202619:32
euvd
Github Security Blog
fastify: request.protocol and request.host Spoofable via X-Forwarded-Proto/Host from Untrusted Connections
25 Mar 202619:32
github
NVD
CVE-2026-3635
23 Mar 202614:16
nvd
OSV
GHSA-444R-CWP2-X5XF fastify: request.protocol and request.host Spoofable via X-Forwarded-Proto/Host from Untrusted Connections
25 Mar 202619:32
osv
Positive Technologies
PT-2026-27132
23 Mar 202600:00
ptsecurity
RedhatCVE
CVE-2026-3635
23 Mar 202617:10
redhatcve
Rows per page
[
  {
    "vendor": "fastify",
    "product": "fastify",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThanOrEqual": "5.8.2",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.8.3",
        "versionType": "semver"
      }
    ],
    "defaultStatus": "unaffected",
    "packageURL": "pkg:npm/fastify"
  }
]

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