Nixpkgs security tracker

Login with GitHub

⚠️ You are using a production deployment that is still only suitable for demo purposes. Any work done in this might be wiped later without notice.

Suggestion detail

Untriaged

Permalink CVE-2026-25949

7.5 HIGH

CVSS version: 3.1
Attack vector (AV): NETWORK
Attack complexity (AC): LOW
Privileges required (PR): NONE
User interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality impact (C): NONE
Integrity impact (I): NONE
Availability impact (A): HIGH

created 2 months ago

Traefik: TCP readTimeout bypass via STARTTLS on Postgres

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.

References

https://github.com/traefik/traefik/security/advisories/GHSA-89p3-4642-cr2w x_refsource_CONFIRM
https://github.com/traefik/traefik/commit/31e566e9f1d7888ccb6fbc18bfed427203c35678 x_refsource_MISC
https://github.com/traefik/traefik/releases/tag/v3.6.8 x_refsource_MISC

Affected products

traefik

==< 3.6.8

Matching in nixpkgs

pkgs.traefik

Modern reverse proxy

nixos-unstable 3.4.4
- nixpkgs-unstable 3.6.7
- nixos-unstable-small 3.6.7
nixos-25.11 3.6.1
- nixos-25.11-small 3.6.1
- nixpkgs-25.11-darwin 3.6.1

pkgs.traefik-certs-dumper

Dump ACME data from traefik to certificates

nixos-unstable 2.10.0
- nixpkgs-unstable 2.11.0
- nixos-unstable-small 2.11.0
nixos-25.11 2.10.0
- nixos-25.11-small 2.10.0
- nixpkgs-25.11-darwin 2.10.0

Package maintainers

@vdemeester Vincent Demeester <vincent@sbr.pm>
@djds djds <git@djds.dev>
@NickCao Nick Cao <nickcao@nichi.co>