High severity · published Feb 12, 2026
CVE-2026-25949
Traefik: TCP readTimeout bypass via STARTTLS on Postgres
7.5
CVSS
0.8%
EPSS
No
On KEV
Description
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 56% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TR
traefik · traefik
< 3.6.8 · source: vendor, NVD
RH
Red Hat OpenShift Dev Spaces 3.27 · Red Hat
All versions, or not specified · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-25949
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-25949
Patch
https://github.com/traefik/traefik/commit/31e566e9f1d7888ccb6fbc18bfed427203c35678
Product
https://github.com/traefik/traefik/releases/tag/v3.6.8
Patch
https://github.com/traefik/traefik/security/advisories/GHSA-89p3-4642-cr2w
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:6192
access.redhat.com
https://access.redhat.com/security/cve/CVE-2026-25949
bugzilla.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2439522
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