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Traefik: Deny Rule Bypass via Unauthenticated Malicious gRPC Requests in gRPC-Go Dependency (CVE-2026-33186)

🗓️ 29 Mar 2026 15:37:28Reported by GitHub Advisory DatabaseType 
github
 github🔗 github.com👁 2 Views

Traefik may bypass deny rules via unauthenticated gRPC requests with missing slash in path.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
FreeBSD		traefik -- Multiple vulnerabilities
26 Mar 202600:00
–freebsd
IBM Security Bulletins		Security Bulletin: IBM Watson Discovery Cartridge affected by vulnerability in google.golang.org/grpc-v1.62.0
28 Apr 202621:25
–ibm
IBM Security Bulletins		Security Bulletin: IBM Security QRadar Log Management AQL Plugin is vulnerable to using components with known vulnerabilities
27 Apr 202613:06
–ibm
IBM Security Bulletins		Security Bulletin: IBM App Connect Enterprise Certified Container backup and restore is vulnerable to authorization bypass (CVE-2026-33186)
7 May 202613:37
–ibm
IBM Security Bulletins		Security Bulletin: Multiple security vulnerabilities addressed with IBM Business Automation Workflow cumulative fixes May 2026
29 May 202616:43
–ibm
IBM Security Bulletins		Security Bulletin: IBM Quantum Safe Remediator is affected by multiple vulnerabilities
5 May 202615:14
–ibm
IBM Security Bulletins		Security Bulletin: ELM on Hybrid Cloud vulnerabilities addressed in 2.0.0
20 Apr 202609:57
–ibm
GithubExploit		Exploit for CVE-2026-33186
6 Apr 202617:33
–githubexploit
ATTACKERKB		CVE-2026-33186
20 Mar 202622:23
–attackerkb
Tenable Nessus		Amazon Linux 2023 : containerd, containerd-stress (ALAS2023-2026-1534)
13 Apr 202600:00
–nessus
Rows per page
Vulners
Node
traefiktraefikRange3.7.0-ea.1–3.7.0-ea.3go
OR
traefiktraefikRange3.0.0-beta3–3.6.12go
OR
traefiktraefikRange<2.11.42go

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29 Mar 2026 15:37Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.19.1
EPSS0.0002
SSVC
CWE-285CWE-1395
Traefikremote procedure callunauthenticated requestspath bypassmissing slash
2