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EUVD-2026-18478

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

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
ATTACKERKB
CVE-2026-34835
2 Apr 202617:09
attackerkb
Information Security Automation
April Linux Patch Wednesday
22 Apr 202616:00
avleonov
Chainguard
CVE-2026-34835 vulnerabilities
6 Apr 202601:18
cgr
CNNVD
Rack 安全漏洞
2 Apr 202600:00
cnnvd
CVE
CVE-2026-34835
2 Apr 202617:09
cve
Cvelist
CVE-2026-34835 Rack: `Rack::Request` accepts invalid Host characters, enabling host allowlist bypass.
2 Apr 202617:09
cvelist
Debian CVE
CVE-2026-34835
2 Apr 202617:09
debiancve
Github Security Blog
Rack::Request accepts invalid Host characters, enabling host allowlist bypass
2 Apr 202620:36
github
NVD
CVE-2026-34835
2 Apr 202618:16
nvd
OSV
CGA-F9QQ-57F2-FFMP
6 Apr 202600:30
osv
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
5.8Medium risk
Vulners AI Score5.8
CVSS 3.14.8
EPSS0.00152
SSVC
0