CVE-2026-25949Traefik: TCP readTimeout bypass via STARTTLS on Postgres
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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Traefik is an HTTP reverse proxy and load balancer. Prior to 3.6.8, there is a potential vulnerability in Traefik managing STARTTLS requests. An unauthenticated client can bypass Traefik entrypoint respondingTimeouts.readTimeout by sending the 8-byte Postgres SSLRequest (STARTTLS) prelude and then stalling, causing connections to remain open indefinitely, leading to a denial of service. This vulnerability is fixed in 3.6.8.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-400, CWE-770
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Modified
- Record last updated
- Jul 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
traefik traefik traefik:traefik (from the name) | before 3.6.8 | CNA record |
Red Hat Red Hat OpenShift Dev Spaces 3.27 redhat:openshift_devspaces | from 1774227265 not affected | CISA ADP |
traefik traefik traefik:traefik | before 3.6.8 | NVD |
References
- https://github.com/traefik/traefik/security/advisories/GHSA-89p3-4642-cr2wx-refsource-confirm, patch, vendor-advisory
- https://github.com/traefik/traefik/commit/31e566e9f1d7888ccb6fbc18bfed427203c35678x-refsource-misc, patch
- https://github.com/traefik/traefik/releases/tag/v3.6.8x-refsource-misc, product, release-notes
- https://access.redhat.com/errata/RHSA-2026:6192
- https://access.redhat.com/security/cve/CVE-2026-25949
- https://bugzilla.redhat.com/show_bug.cgi?id=2439522
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-25949.json
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.