CVE-2026-88008Disclosure(traefik / traefik)

LOWCVSS 9.1 · CRITICAL

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

Traefik is an open source HTTP reverse proxy and load balancer. From 2.11.26 until 2.11.57 and 3.7.13, Traefik forwards a client-supplied Connection header requesting Upgrade, the Upgrade: h2c token, and HTTP2-Settings to a shared backend. If the backend accepts h2c and returns 101 Switching Protocols, Traefik enters a raw tunnel and no longer applies routers, BasicAuth, ForwardAuth, IPAllowList, RateLimit, access logging, metrics, or tracing to later HTTP/2 requests, allowing an unauthenticated request through an unprotected route to reach protected paths on the same backend. This issue is fixed in 2.11.57 and 3.7.13.

0.0/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-444CWE-863

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • traefik

Threat summary

  • 1 mentions across 1 observed day

What's happening

  • Technical details provided in 1 signal
  • Disclosure: 1 classified signal
  • 1 total mentions across 1 day

Affected systems

Vendors
Products
traefik

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-09-11: 1Technical Details · 2026-09-11: 109-11
Signal classification1 categories
Disclosure
1100.0%
Referenced assets1 URL
Full discourse1 post
  • NewNormal Security@NewScanTeam
    Disclosure

    NewNormal Security turns the last 24 hours of CVEs into new detections, every day. 𝗗𝗮𝗶𝗹𝘆 𝗖𝗩𝗘 𝗥𝗲𝗽𝗼𝗿𝘁 — 11 Sep 2026 𝗔𝗱𝗱𝗲𝗱 to NewScan 𝘁𝗼𝗱𝗮𝘆: 📦 Reverse proxy on a build named in this week's advisories — reach the protected backend with none of its auth, allowlist or rate-limit middleware (Traefik CVE-2026-88877, CVE-2026-88007, CVE-2026-88009, CVE-2026-88008, CVE-2026-88004, CVE-2026-88878, CVE-2026-88879, CVE-2026-88011, CVE-2026-88012) 🔓 Authorization written as a list of HTTP verbs, with one verb missing from the list — send the same request as PATCH and the access check never runs (OpenNMS CVE-2026-89054) 🕳️ Media-server plugin status page answering anonymously — read the host's binary paths, open ports and plugin log without logging in (WWBN AVideo CVE-2026-89248) Test your stack with NewScan — free, self-hosted: https://newnormalsecurity.com/newscan?utm_source=x&utm_medium=social&utm_campaign=daily-cve #infosec #AppSec #AuthBypass #CSO #REDTEAM

    Post summary

    The post announces a set of newly disclosed CVEs and briefly outlines how they can be exploited, but offers no PoC, active exploitation evidence, or patch information.

    0000051
    7 followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Apptraefiktraefik---

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