CVE-2026-25949
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Traefik
PublishedFeb 12, 2026
First seenFeb 12, 2026
Weakness typeCWE-400Uncontrolled resource consumption
How to fix
Update
- traefik traefik3.6.8 or later
- github.com/traefik/traefik/v33.6.8 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| traefik traefik | v < 3.6.8 | 3.6.8 |
| github.com/traefik/traefik/v3Go | v < 3.6.8 | 3.6.8 |
| github.com/traefik/traefikGo | No range specified | — |
| github.com/traefik/traefik/v2Go | No range specified | — |
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