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CVE-2026-34830 Rack: Rack::Sendfile regex injection via HTTP_X_ACCEL_MAPPING header allows arbitrary file reads through nginx

🗓️ 02 Apr 2026 16:47:40Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 42 Views

CVE-2026-34830: Rack::Sendfile regex injection HTTP_X_ACCEL_MAPPING enables arbitrary file reads.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-34830
2 Apr 202616:47
–attackerkb
bdu_fstec
BDU FSTEC
Rack map_accel_path Unauthorized Access
3 Jun 202600:00
–bdu_fstec
cgr
Chainguard
CVE-2026-34830 vulnerabilities
6 Apr 202601:18
–cgr
cnnvd
CNNVD
Rack security vulnerabilities
2 Apr 202600:00
–cnnvd
cve
CVE
CVE-2026-34830
2 Apr 202616:47
–cve
debian
Debian
[SECURITY] [DLA 4706-1] ruby-rack security update
30 Jul 202618:46
–debian
debian
Debian
[SECURITY] [DLA 4706-2] ruby-grape regression update
19 Aug 202610:18
–debian
debian
Debian
[SECURITY] [DSA 6492-1] ruby-rack security update
10 Sep 202620:35
–debian
debiancve
Debian CVE
CVE-2026-34830
2 Apr 202616:47
–debiancve
nessus
Tenable Nessus
Debian dla-4706 : ruby-rack - security update
30 Jul 202600:00
–nessus
Rows per page
[
  {
    "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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02 Apr 2026 16:47Current
CVSS 3.15.9
EPSS0.00243
SSVC
42