Answer in brief
CVE-2026-61795 records a Medium severity (CVSS 6.8) vulnerability in Capsule: hostnameRegexHandler.OnUpdate validates stale (old) Tenant regex, allowing invalid AllowedHostnames regex to bypass webhook validation. The current sources do not mark it as known exploited. The current feed maps projectcapsule/capsule (generic), github.com/projectcapsule/capsule (go), github.com/projectcapsule/capsule (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 6.8. 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 projectcapsule/capsule (generic), github.com/projectcapsule/capsule (go), github.com/projectcapsule/capsule (go). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| projectcapsule/capsulegeneric | >=0.13.0 <0.13.7 | 0.13.7 |
| github.com/projectcapsule/capsulego | >=0.13.0,<0.13.7 | 0.13.7 |
| github.com/projectcapsule/capsulego | >=0.13.0 <0.13.7 | 0.13.7 |
Published upstream
Sep 18, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 28, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 18, 2026
Capsule is a multi-tenancy and policy-based framework for Kubernetes. From 0.13.0 until 0.13.7, hostnameRegexHandler.OnUpdate in internal/webhook/tenant/validation/hostname_regex.go reverses the new and old Tenant parameters and validates the previous AllowedHostnames.Regex instead of the submitted value. A cluster administrator can therefore store a malformed AllowedHostnames.Regex after the webhook accepts the update based on stale valid state. Subsequent Ingress creation or update reaches validate_hostnames.go, which evaluates the malformed pattern, ignores the regular-expression error, and treats every hostname as unmatched, blocking Ingress operations for the affected tenant until an administrator repairs the Tenant configuration. This issue is fixed in version 0.13.7.
Quoted source text, attributed separately from HOL analysis.