CVE-2023-46254 is a medium-severity security vulnerability in github.com/projectcapsule/capsule (go), affecting versions <= 0.4.4. It is fixed in 0.4.5.
Summary A bug in the RoleBinding reflector used by capsule-proxy gives ServiceAccount tenant owners the right to list Namespaces of other tenants backed by the same owner kind and name. Details Tenant solar, owned by a ServiceAccount named tenant-owner in the Namespace solar Tenant wind, owned by a ServiceAccount named tenant-owner in the Namespace wind Please, notice the same ServiceAccount name, although in different namespaces. The Tenant owner solar would be able to list the namespaces of the Tenant wind and vice-versa, although this is not correct. The bug introduces an exfiltration vulnerability since allows the listing of Namespace resources of other Tenants, although just in some specific conditions: capsule-proxy runs with the --disable-caching=false (default value: false) Tenant owners are ServiceAccount, with the same resource name, but in different Namespaces. The CVE doesn't allow any privilege escalation on the outer tenant Namespace-scoped resources, since the Kubernetes RBAC is enforcing this.
CVE-2023-46254 has a CVSS score of 4.3 (Medium). The vector is network-reachable, low privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment.
A fixed version is available (0.4.5). Upgrading removes the vulnerable code path.
go
github.com/projectcapsule/capsule (<= 0.4.4)github.com/projectcapsule/capsule-proxy (<= 0.4.4)github.com/projectcapsule/capsule → 0.4.5 (go)github.com/projectcapsule/capsule-proxy → 0.4.5 (go)Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter instead of chasing every advisory.
Kodem's runtime-powered SCA identifies whether CVE-2023-46254 is reachable in your applications. Explore open-source security for your team.
See if CVE-2023-46254 is reachable in your applications. Get a demo
Upgrade the following packages to resolve this vulnerability:
github.com/projectcapsule/capsule to 0.4.5 or latergithub.com/projectcapsule/capsule-proxy to 0.4.5 or laterKodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
CVE-2023-46254 is a medium-severity security vulnerability in github.com/projectcapsule/capsule (go), affecting versions <= 0.4.4. It is fixed in 0.4.5.
CVE-2023-46254 has a CVSS score of 4.3 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
github.com/projectcapsule/capsule (go) (versions <= 0.4.4)github.com/projectcapsule/capsule-proxy (go) (versions <= 0.4.4)Yes. CVE-2023-46254 is fixed in 0.4.5. Upgrade to this version or later.
Whether CVE-2023-46254 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
github.com/projectcapsule/capsule to 0.4.5 or latergithub.com/projectcapsule/capsule-proxy to 0.4.5 or later