Answer in brief
CVE-2026-65602 records a Medium severity (CVSS 5.3) vulnerability in Traefik before 3.6.23 IngressRouteTCP ServersTransport Namespace Bypass. The current sources do not mark it as known exploited. The current feed maps traefik/traefik (generic), traefik/traefik (generic), github.com/traefik/traefik/v3 (go), github.com/traefik/traefik/v3 (go). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps traefik/traefik (generic), traefik/traefik (generic), github.com/traefik/traefik/v3 (go), github.com/traefik/traefik/v3 (go). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| traefik/traefikgeneric | >=3.6.0 <3.6.23 | 3.6.23 |
| traefik/traefikgeneric | >=3.7.0 <3.7.7 | 3.7.7 |
| github.com/traefik/traefik/v3go | >=3.6.0,<=3.6.22 | 3.6.23 |
| github.com/traefik/traefik/v3go | >=3.7.0,<=3.7.6 | 3.7.7 |
Published upstream
Jul 22, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
Traefik 3.6.0 through 3.6.22 and 3.7.0 through 3.7.6 fail to enforce the crossProviderNamespaces allowlist for IngressRouteTCP service serversTransport references (the allowlist was only enforced for HTTP serversTransport references). A low-privileged Kubernetes user in a namespace not listed in crossProviderNamespaces can set serversTransport: foo@file on an IngressRouteTCP service, causing Traefik to accept the forbidden cross-provider reference and use a file-provider TCPServersTransport — including privileged backend mTLS client certificates, SPIFFE identity, or PROXY-protocol settings. This is fixed in 3.6.23 and 3.7.7.
Quoted source text, attributed separately from HOL analysis.