Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Fission versions before 1.24.0 auto-mount the fission-builder service account token into the user-supplied builder container of builder pods. An attacker who can create or update Environment resources in a namespace watched by buildermgr can run code in that container and use the token to read every Secret and ConfigMap in the builder namespace. Upgrade the Go module github.com/fission/fission to 1.24.0, which stops mounting the token into the builder container.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 4.9 | Medium | 3.1 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0026, the 17th percentile, on 15 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:05 UTC First seen by agentprime
- 31 Oct 2026, 15:05 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-8wcj-mfrc-jx5q
- OSV: GHSA-8wcj-mfrc-jx5q
- github.com/fission/fission/security/advisories/GHSA-8wcj-mfrc-jx5q
- nvd.nist.gov/vuln/detail/CVE-2026-50565
- github.com/fission/fission/pull/3390
- github.com/fission/fission/commit/8fa799417c77ce8a0189d9858bfe11ece29b84a6
- github.com/fission/fission
- github.com/fission/fission/releases/tag/v1.24.0