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The vulnerability of the Containous Traefik reverse proxy server, related to bypassing authentication through spoofing, allows attackers to compromise the confidentiality, integrity, and accessibility of protected information.

🗓️ 28 Apr 2026 00:00:00Reported by FSTEC of Russia — Information Security Threat DatabaseType 
bdu_fstec
 bdu_fstec
🔗 bdu.fstec.ru👁 1 Views

Traefik reverse proxy vulnerability allows authentication bypass by spoofing, compromising confidentiality, integrity, and availability of protected information.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
FreeBSD
traefik -- Multiple vulnerabilities
26 Mar 202600:00
freebsd
ATTACKERKB
CVE-2026-33433
27 Mar 202613:49
attackerkb
AlpineLinux
CVE-2026-33433
27 Mar 202613:49
alpinelinux
Information Security Automation
April Linux Patch Wednesday
22 Apr 202616:00
avleonov
Chainguard
CVE-2026-33433 vulnerabilities
7 Apr 202607:17
cgr
Circl
CVE-2026-33433
27 Mar 202610:29
circl
CNNVD
Traefik 安全漏洞
27 Mar 202600:00
cnnvd
CVE
CVE-2026-33433
27 Mar 202613:49
cve
Cvelist
CVE-2026-33433 Traefik Vulnerable to BasicAuth/DigestAuth Identity Spoofing via Non-Canonical headerField
27 Mar 202613:49
cvelist
EUVD
EUVD-2026-16616
27 Mar 202620:35
euvd
Rows per page
Vulners
Node
containoustraefikRange<2.11.42
OR
containoustraefikRange<3.7.0-ea.3
OROR
containoustraefikRange3.0.03.6.12
OR
containoustraefikMatch3.7.0-ea.1
OR
containoustraefikMatch3.7.0-ea.2

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28 Apr 2026 00:00Current
5.8Medium risk
Vulners AI Score5.8
CVSS 38.8
CVSS 29
EPSS0.00469
1