Vulnerability · Published Jun 10, 2026 · Assigned by GitHub_M
CVE-2026-46617Fission runtime pods automount the fission-fetcher service-account token into the user function container, granting function code namespace-wide secret / configmap read
High 8.7
In plain English
A high-severity privilege mismanagement in fission from fission. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Fission is an open-source, Kubernetes-native serverless framework that simplifies the deployment of functions and applications on Kubernetes. Prior to version 1.23.0, Fission runtime pods were created with ServiceAccountName: fission-fetcher, and the fission-fetcher ServiceAccount was granted namespace-wide get on secrets and configmaps (it needs that to load function code, env vars, and config). The runtime pod's automounted token was reachable from inside the user's function container at /var/run/secrets/kubernetes.io/serviceaccount/token, so user-supplied function code inherited the same Kubernetes API privileges and could read any secret or configmap in the function's namespace — far beyond the Function.spec.secrets allowlist that the function specification suggests. This issue has been patched in version 1.23.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/fission/fission | 1.23.0 | GHSA-85g2-pmrx-r49q |
| Go | github.com/fission/fission | 1.23.0 | GO-2026-5241 |
Affected products (as reported)
Weakness: CWE-250, CWE-269, CWE-538 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
References
- https://github.com/fission/fission/security/advisories/GHSA-85g2-pmrx-r49q x_refsource_CONFIRM
- https://github.com/fission/fission/pull/3366 x_refsource_MISC
- https://github.com/fission/fission/releases/tag/v1.23.0 x_refsource_MISC