CVE-2026-22045— Traefik's ACME TLS-ALPN fast path lacks timeouts and close on handshake stall
Quick assessment
Affected
traefik traefik
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Traefik是Traefik开源的一款开源的反向代理与负载均衡工具。 Traefik 2.11.35之前版本和3.6.7之前版本存在安全漏洞，该漏洞源于ACME TLS证书自动生成存在潜在漏洞，可能导致拒绝服务攻击。
Possible ATT&CK Techniques 1 AI
T1499.002 · Service Exhaustion Flood
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2026-22045
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Traefik's ACME TLS-ALPN fast path lacks timeouts and close on handshake stall
Source: CVE Program / CVE List V5
Vulnerability Description
Traefik is an HTTP reverse proxy and load balancer. Prior to 2.11.35 and 3.6.7, there is a potential vulnerability in Traefik ACME TLS certificates' automatic generation: the ACME TLS-ALPN fast path can allow unauthenticated clients to tie up go routines and file descriptors indefinitely when the ACME TLS challenge is enabled. A malicious client can open many connections, send a minimal ClientHello with acme-tls/1, then stop responding, leading to denial of service of the entry point. The vulnerability is fixed in 2.11.35 and 3.6.7.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
Traefik 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Traefik是Traefik开源的一款开源的反向代理与负载均衡工具。 Traefik 2.11.35之前版本和3.6.7之前版本存在安全漏洞，该漏洞源于ACME TLS证书自动生成存在潜在漏洞，可能导致拒绝服务攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-22045
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-22045
请登录查看更多情报信息。
IV. Related Vulnerabilities
Same product: traefik
-
CVE-2026-88010
Traefik: BasicAuth singleflight coalescing reintroduces an u -
CVE-2026-88012
Traefik: respondingTimeouts.readTimeout is not applied to HT -
CVE-2026-88011
Traefik: ForwardAuth identity spoofing via dot-form header a -
CVE-2026-88009
Traefik: Rootless HTTP/1 request-target routes as "/" but is -
CVE-2026-88008
Traefik: Inconsistent Interpretation of HTTP Requests ('HTTP
Same vendor: traefik
-
CVE-2026-88010
Traefik: BasicAuth singleflight coalescing reintroduces an u -
CVE-2026-88012
Traefik: respondingTimeouts.readTimeout is not applied to HT -
CVE-2026-88011
Traefik: ForwardAuth identity spoofing via dot-form header a -
CVE-2026-88009
Traefik: Rootless HTTP/1 request-target routes as "/" but is -
CVE-2026-88008
Traefik: Inconsistent Interpretation of HTTP Requests ('HTTP
Same weakness: CWE-770
-
CVE-2026-1403
Allocation of Resources Without Limits or Throttling in GitL -
CVE-2026-107212
Excelize: Unbounded row number in Rows.Columns makes GetRows -
CVE-2026-20173
Cisco NX-OS Software Denial of Service Vulnerability -
CVE-2026-107166
Open5GS GTP-U Receive Path gtp-path.c ogs_pfcp_xact_local_cr -
CVE-2026-106569
ImageMagick: Denial of service in ASE decoder because of mis
V. Comments for CVE-2026-22045
No comments yet