CVE-2026-50565 json
Fission builder pods auto-mount the fission-builder ServiceAccount token in the user-supplied builder container
published 2026-06-10 4 mo ago modified 2026-07-07 4 mo ago also GHSA-8wcj-mfrc-jx5q , GO-2026-5850 , EUVD-2026-36101
- cvss
- 4.9
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 17%
- public exploits
- 0
- none known
Summary
Fission is an open-source, Kubernetes-native serverless framework that simplifies the deployment of functions and applications on Kubernetes. Prior to version 1.24.0, Fission builder pods were created with ServiceAccountName: fission-builder and no AutomountServiceAccountToken: false, so the kubelet auto-mounted the service-account token into every container in the pod — including the user-supplied builder image. This issue has been patched in version 1.24.0.
Patch / fix
- go github.com/fission/fission 1.24.0
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
- github.com/fission/fission@8fa7994 commit
- github.com/fission/fission#3390 pull request
- github.com/fission/fission/releases/tag/v1.24.0 release
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.26% chance of exploitation in the next 30 days, higher than 17% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.9 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N |
| GitHub | 3.1 | 4.9 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/fission/fission | <1.24.0 |
1.24.0 |
Affected products
- fission fission
Classification
References
-
github.com
/fission/fission/pull/3390
web, patch
-
github.com
/fission/fission/commit/8fa799417c77ce8a0189d9858bfe11ece29b84a6
web, patch
-
github.com
/fission/fission/security/advisories/GHSA-8wcj-mfrc-jx5q
web, advisory
-
github.com
/fission/fission/releases/tag/v1.24.0
web
-
nvd.nist.gov
/vuln/detail/CVE-2026-50565
advisory
-
github.com
/fission/fission
package
Sources
- CVE List CVE-2026-50565
- GitHub Advisory GHSA-8wcj-mfrc-jx5q
- NVD CVE-2026-50565
- OSV GO-2026-5850
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.