CVE-2026-25949 — Uncontrolled Resource Consumption in Traefik

CWE-400 — Uncontrolled Resource ConsumptionCWE-770 — Allocation of Resources Without Limits or Throttling7 documents6 sources
Severity
7.5HIGHNVD
EPSS
0.0%
top 95.33%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
TraefikGithub.com Traefik Traefik V3
Timeline
PublishedFeb 12
Latest updateFeb 17

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:HExploitability: 3.9 | Impact: 3.6

Affected Packages3 packages

▶CVEListV5traefik/traefik< 3.6.8
▶NVDtraefik/traefik< 3.6.8

Patches

Patch: github.com ↗Patch: github.com ↗

🔴Vulnerability Details

4
OSV
Traefik: TCP readTimeout bypass via STARTTLS on Postgres in github.com/traefik/traefik↗2026-02-17
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CVEList
Traefik: TCP readTimeout bypass via STARTTLS on Postgres↗2026-02-12
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GHSA
Traefik: TCP readTimeout bypass via STARTTLS on Postgres↗2026-02-12
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OSV
Traefik: TCP readTimeout bypass via STARTTLS on Postgres↗2026-02-12
▶

📋Vendor Advisories

1
Red Hat
github.com/traefik/traefik: Traefik: Denial of Service via stalled STARTTLS requests↗2026-02-12
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🕵️Threat Intelligence

1
Wiz
CVE-2026-25949 Impact, Exploitability, and Mitigation Steps | Wiz↗
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CVE-2026-25949 — Uncontrolled Resource Consumption | cvebase