CVE-2019-12452 Containous Traefik Exposes Password Hashes
Authenticated users can expose password hashes and keys via the API if it is publicly accessible without proper access control.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2019-12452?
CVE-2019-12452 is a high-severity vulnerability in Traefik Traefik, published on 29 May 2019. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
types/types.go in Containous Traefik 1.7.x through 1.7.11, when the --api flag is used and the API is publicly reachable and exposed without sufficient access control (which is contrary to the API documentation), allows remote authenticated users to discover password hashes by reading the Basic HTTP Authentication or Digest HTTP Authentication section, or discover a key by reading the ClientTLS section. These can be found in the JSON response to a /api request.
Weakness: CWE-522
Which versions are affected by CVE-2019-12452?
3 open source packages ship an affected version, including github.com/traefik/traefik. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/traefik/traefik Go | From 1.7.0 | 1.7.12 |
github.com/traefik/traefik Go | From 1.7.0 | 1.7.12 |
github.com/traefik/traefik Go | From 1.7.0 | 1.7.12 |
Products include Traefik Traefik.
How do I fix CVE-2019-12452?
Upgrade github.com/traefik/traefik to 1.7.12 or later.
Is CVE-2019-12452 being exploited?
There is no known exploitation of CVE-2019-12452 in the wild and no public exploit code.
Other vulnerabilities in Traefik Traefik
- CVE-2024-45410 HTTP client can remove the X-Forwarded headers in Traefik
- CVE-2026-88877 Traefik v3.7.0 Authentication Bypass via from-to-www-redirect
- CVE-2026-85595 Traefik before v2.11.55 and v3.0.0 through v3.7.10 Authentication Bypass via digestAuth
- CVE-2026-88007 Traefik HTTP/3 Backend NTLM Connection Reuse
- CVE-2026-88009 Traefik: Rootless HTTP/1 request-target routes as "/" but is forwarded verbatim, bypassing path-scoped routing, middleware guards and access logging
Sources
Also known as GHSA-r3fq-cmmw-cpmm, GO-2023-1919.