Traefik (pronounced traffic) is an HTTP reverse proxy and load balancer. In versions prior to 2.11.24, 3.3.6, and 3.4.0-rc2. There is a potential vulnerability in Traefik managing the requests using a PathPrefix, Path or PathRegex matcher. When Traefik is configured to route the requests to a backend using a matcher based on the path, if the URL contains a /../ in its path, it’s possible to target a backend, exposed using another router, by-passing the middlewares chain. This issue has been patched in versions 2.11.24, 3.3.6, and 3.4.0-rc2. A workaround involves adding a PathRegexp rule to the matcher to prevent matching a route with a /../ in the path.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-22"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/32xxx/CVE-2025-32431.json"
}{
"cpe": [
"cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*",
"cpe:2.3:a:traefik:traefik:3.4.0:-:*:*:*:*:*:*",
"cpe:2.3:a:traefik:traefik:3.4.0:rc1:*:*:*:*:*:*"
],
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "2.11.24"
},
{
"introduced": "3.0.0"
},
{
"fixed": "3.3.6"
},
{
"introduced": "3.4.0-NA"
},
{
"last_affected": "3.4.0-NA"
},
{
"introduced": "3.4.0-rc1"
},
{
"last_affected": "3.4.0-rc1"
}
],
"source": [
"CPE_RANGE",
"CPE_STRING",
"REFERENCES"
]
}