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EUVD-2026-18478

🗓️ 02 Apr 2026 20:36:40Reported by EUVDType 
euvd
 euvd
🔗 euvd.enisa.europa.eu👁 24 Views

Rack is vulnerable to host header poisoning due to flawed Host parsing in older versions; fixed in 3.1.21 and 3.2.6.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
githubexploit
GithubExploit
Exploit for Improper Validation of Syntactic Correctness of Input in Rack
3 Jul 202602:50
–githubexploit
attackerkb
attackerkb
CVE-2026-34835
2 Apr 202617:09
–attackerkb
avleonov
Information Security Automation
April Linux Patch Wednesday
22 Apr 202616:00
–avleonov
bdu_fstec
BDU FSTEC
Rack Request Bypass
6 Jul 202600:00
–bdu_fstec
cgr
Chainguard
CVE-2026-34835 vulnerabilities
6 Apr 202601:18
–cgr
circl
Circl
CVE-2026-34835
14 Jul 202601:00
–circl
cnnvd
CNNVD
Rack security vulnerabilities
2 Apr 202600:00
–cnnvd
cve
CVE
CVE-2026-34835
2 Apr 202617:09
–cve
cvelist
Cvelist
CVE-2026-34835 Rack: `Rack::Request` accepts invalid Host characters, enabling host allowlist bypass.
2 Apr 202617:09
–cvelist
debian
Debian
[SECURITY] [DSA 6492-1] ruby-rack security update
10 Sep 202620:35
–debian
Rows per page
[
  {
    "enisaIdVendor": [
      {
        "id": "44f95580-97e9-3497-a556-fc2c93a17dfe",
        "vendor": {
          "name": "rack"
        }
      }
    ],
    "enisaIdProduct": [
      {
        "id": "41197ba3-fac8-37bd-8061-475f3810fee2",
        "product": {
          "name": "rack"
        },
        "product_version": "3.0.0.beta1, < 3.1.21"
      },
      {
        "id": "7e84ed8a-283b-3102-bde0-9fdd302b3e8b",
        "product": {
          "name": "rack"
        },
        "product_version": "3.2.0, < 3.2.6"
      }
    ]
  }
]

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02 Apr 2026 20:36Current
6.3Medium risk
Vulners AI Score6.3
CVSS 3.14.8
EPSS0.002
SSVC
24