Answer in brief
CVE-2026-71325 records a Medium severity (CVSS 4.8) vulnerability in Traefik: `allowCrossNamespace=false` bypass via `@kubernetescrd` TraefikService backendRef. The current sources do not mark it as known exploited. The current feed maps traefik/traefik (generic), github.com/traefik/traefik (go), github.com/traefik/traefik/v2 (go), github.com/traefik/traefik/v3 (go) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2026-71325 records a Medium severity (CVSS 4.8) vulnerability in Traefik: `allowCrossNamespace=false` bypass via `@kubernetescrd` TraefikService backendRef. The current sources do not mark it as known exploited. The current feed maps traefik/traefik (generic), github.com/traefik/traefik (go), github.com/traefik/traefik/v2 (go), github.com/traefik/traefik/v3 (go) and additional mapped packages. 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 4.8. 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), github.com/traefik/traefik (go), github.com/traefik/traefik/v2 (go), github.com/traefik/traefik/v3 (go) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| traefik/traefikgeneric | < 2.11.54 || >= 3.0.0, < 3.6.25 || >= 3.7.0, < 3.7.10 | Not reported |
| github.com/traefik/traefikgo | <=1.7.34 | Not reported |
| github.com/traefik/traefik/v2go | <=2.11.53 | 2.11.54 |
| github.com/traefik/traefik/v3go | >=3.0.0,<=3.6.24 | 3.6.25 |
| github.com/traefik/traefik/v3go | >=3.7.0,<=3.7.9 | 3.7.10 |
Published upstream
Aug 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 6, 2026
Traefik is an open-source edge router that makes publishing services a fun and easy experience. Prior to 2.11.54, 3.6.25, and 3.7.10, cross-namespace @kubernetescrd references are not rejected for TraefikService backend references resolved by the service resolver. A tenant confined by RBAC to a single namespace can therefore bind its own router to a TraefikService owned by another namespace and expose or reroute that namespace's backend, defeating the namespace isolation allowCrossNamespace=false is meant to enforce. This issue is fixed in version 2.11.54, 3.6.25, 3.7.10.
Quoted source text, attributed separately from HOL analysis.
CVSS is 4.8. 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), github.com/traefik/traefik (go), github.com/traefik/traefik/v2 (go), github.com/traefik/traefik/v3 (go) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| traefik/traefikgeneric | < 2.11.54 || >= 3.0.0, < 3.6.25 || >= 3.7.0, < 3.7.10 | Not reported |
| github.com/traefik/traefikgo | <=1.7.34 | Not reported |
| github.com/traefik/traefik/v2go | <=2.11.53 | 2.11.54 |
| github.com/traefik/traefik/v3go | >=3.0.0,<=3.6.24 | 3.6.25 |
| github.com/traefik/traefik/v3go | >=3.7.0,<=3.7.9 | 3.7.10 |
Published upstream
Aug 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 6, 2026
Traefik is an open-source edge router that makes publishing services a fun and easy experience. Prior to 2.11.54, 3.6.25, and 3.7.10, cross-namespace @kubernetescrd references are not rejected for TraefikService backend references resolved by the service resolver. A tenant confined by RBAC to a single namespace can therefore bind its own router to a TraefikService owned by another namespace and expose or reroute that namespace's backend, defeating the namespace isolation allowCrossNamespace=false is meant to enforce. This issue is fixed in version 2.11.54, 3.6.25, 3.7.10.
Quoted source text, attributed separately from HOL analysis.