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CVE-2026-34831

🗓️ 02 Apr 2026 16:43:08Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov👁 84 Views

Rack::Files 404 responses misreport Content-Length for UTF-8 paths, risking desynchronization; fixed in 2.2.23, 3.1.21, 3.2.6.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-34831
2 Apr 202616:43
–attackerkb
bdu_fstec
BDU FSTEC
Rack Modular Interface Buffer Overflow
3 Jun 202600:00
–bdu_fstec
cgr
Chainguard
CVE-2026-34831 vulnerabilities
6 Apr 202601:18
–cgr
cnnvd
CNNVD
Rack security vulnerabilities
2 Apr 202600:00
–cnnvd
cvelist
Cvelist
CVE-2026-34831 Rack: Content-Length mismatch in Rack::Files error responses
2 Apr 202616:43
–cvelist
debian
Debian
[SECURITY] [DLA 4706-1] ruby-rack security update
30 Jul 202618:46
–debian
debian
Debian
[SECURITY] [DSA 6492-1] ruby-rack security update
10 Sep 202620:35
–debian
debiancve
Debian CVE
CVE-2026-34831
2 Apr 202616:43
–debiancve
nessus
Tenable Nessus
Debian dla-4706 : ruby-rack - security update
30 Jul 202600:00
–nessus
nessus
Tenable Nessus
Debian dsa-6492 : ruby-rack - security update
10 Sep 202600:00
–nessus
Rows per page
NVD
Vulners
Node
OR
rackrackRange<2.2.23ruby
rackrackRange3.0.0–3.1.21ruby
rackrackRange3.2.0–3.2.6ruby
[
  {
    "vendor": "rack",
    "product": "rack",
    "versions": [
      {
        "version": "< 2.2.23",
        "status": "affected"
      },
      {
        "version": ">= 3.0.0.beta1, < 3.1.21",
        "status": "affected"
      },
      {
        "version": ">= 3.2.0, < 3.2.6",
        "status": "affected"
      }
    ]
  }
]

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24 Jul 2026 21:10Current
6.5Medium risk
Vulners AI Score6.5
CVSS 3.14.8 - 6.5
EPSS0.00152
SSVC
84