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CVE-2026-26961 Rack: Multipart Boundary Parsing Ambiguity allowing WAF Bypass

🗓️ 02 Apr 2026 16:42:16Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 38 Views

Rack multipart boundary parsing ambiguity may bypass WAF via another boundary; patched in 2.2.23, 3.1.21, and 3.2.6.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-26961
2 Apr 202616:42
–attackerkb
ibm
IBM Security Bulletins
Security Bulletin: Multiple vulnerabilities in IBM Aspera Console
16 Apr 202622:21
–ibm
ibm
IBM Security Bulletins
Security Bulletin: Multiple vulnerabilities in IBM Aspera Enterprise WebApps
29 Apr 202618:41
–ibm
bdu_fstec
BDU FSTEC
Rack Modular Interface Bypass
3 Jun 202600:00
–bdu_fstec
cgr
Chainguard
CVE-2026-26961 vulnerabilities
6 Apr 202601:18
–cgr
cnnvd
CNNVD
Rack 安全漏洞
2 Apr 202600:00
–cnnvd
cve
CVE
CVE-2026-26961
2 Apr 202616:42
–cve
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-2026-26961
2 Apr 202616:42
–debiancve
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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