6.9

CVE-2026-88012: traefik

CVSS: 6.9v4.0MediumAnalyzed
AliasesCGA-4pjv-79qw-2v54CGA-f9wh-mwhx-hmg5CGA-fvrc-8772-gpv2
Published 10-09-2026Last modified 11-09-2026
Open JSON

Vulnerability summary

CVE-2026-88012 is a medium (CVSS 6.9) vulnerability in traefik. EPSS estimates a 0.52% chance of exploitation in the next 30 days, higher than 42.6% of scored vulnerabilities.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.9/10
010
Medium · v4.0 (NVD)
EPSS score
0.52%
0%100%
Low · +0.22 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 3 · Related 3
OPENSUSE-SU-2026:21897-1SUSE-SU-2026:23855-1SUSE-SU-2026:23863-1

Timeline

  1. 10-09-2026
    PublishedVulnerability first disclosed.
  2. 11-09-2026
    Last modifiedVulnerability information updated.

Description

Traefik is an HTTP reverse proxy and load balancer. In versions >= v2.8.2 through <= v2.11.55 and >= v3.0.0 through <= v3.7.11, the entryPoints.<name>.transport.respondingTimeouts settings — notably readTimeout, which is enabled by default at 60s — are not applied to the HTTP/3 request path. readTimeout is enforced as a deadline on the underlying TCP connection, which cannot be applied to a QUIC stream, and Traefik's HTTP/3 server is constructed without any timeout. As a result, on entry points with HTTP/3 enabled, an unauthenticated remote client that trickles request body bytes can hold a request open indefinitely and, with it, one upstream connection per request, exhausting bounded backend connection pools and causing denial of service. The issue was introduced in v2.8.2 when a quic-go API change removed the embedded http.Server that carried these timeouts. Fixed in v2.11.56 and v3.7.12.

CVSS metrics

6 scores · 5 sources · 2 versions

EPSS trend

Probability

0.52%

Chance of exploitation in the next 30 days

Percentile

43%

Versus all other CVEs

30-day change

+0.22 pp

From 0.30% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.52%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard2 products
  • traefik-3.6All versions (No fix recorded)
  • traefik-fips-3.6All versions (No fix recorded)
Github.com/traefik/traefik2 products
  • v2≥ 2.8.2, < 2.11.56
  • v3≥ 3.0.0, < 3.7.12
Github.com/traefik1 product
  • traefikAll versions (No fix recorded)
Traefik1 product
  • traefik≥ 2.8.2, < 2.11.56 | ≥ 3.0.0, < 3.7.12
Wolfi1 product
  • traefik-3.6All versions (No fix recorded)

5 vendors · 7 products

References

11 links
Show all 11 references