CVE-2026-88004Disclosure(traefik / traefik)

LOWCVSS 7.4 · HIGH

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 3.2.0 until 3.7.13, Traefik entrypoint defenses aliasHeadersStrategy, underscoreHeadersStrategy, and forwardedHeaders inspect req.Header but not req.Trailer, allowing an unauthenticated client to submit an aliasing or trusted header name in an HTTP/1.1 chunked trailer or an HTTP/2 trailer. When the retry or buffering middleware reads the body before the reverse proxy clones the request, the attacker-controlled trailer value reaches a backend that merges trailers into the header namespace, bypassing the documented delete or reject behavior and potentially spoofing identity or forwarded routing data. This issue is fixed in 3.7.13.

0.0/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-436CWE-807

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 daily CVE report from NewNormal Security lists recently disclosed vulnerabilities with brief technical descriptions such as authentication bypass and information disclosure, but it does not mention exploitation, PoC, or mitigations.

    0000051
    7 followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Apptraefiktraefik---

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