CVE-2026-50566 json
Fission: Environment Runtime.Container and Builder.Container SecurityContext bypass allows privileged pod creation
published 2026-06-10 4 mo ago modified 2026-07-07 4 mo ago also GHSA-m63v-2g9w-2w6v , GO-2026-5857 , EUVD-2026-36102
- cvss
- 9.9
- 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 21%
- 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, a tenant with environments.fission.io create/update RBAC can run privileged / allowPrivilegeEscalation / dangerous-capability containers in the Fission function or builder namespace, scheduled under the executor's high-privilege service account — enabling container-sandbox escape, host filesystem and network access, and potential node- and cluster-level compromise. 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@695d3e9 commit
- github.com/fission/fission#3406 pull request
- github.com/fission/fission/releases/tag/v1.24.0 release
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 4 mo ago
Exploit prediction
0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.9 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
| GitHub | 3.1 | 9.9 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
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/3406
web, patch
-
github.com
/fission/fission/commit/695d3e97e3a20463ab7c8c081843e69e65e952e5
web, patch
-
github.com
/fission/fission/security/advisories/GHSA-m63v-2g9w-2w6v
web, advisory
-
github.com
/fission/fission/releases/tag/v1.24.0
web
-
nvd.nist.gov
/vuln/detail/CVE-2026-50566
advisory
-
github.com
/fission/fission
package
Sources
- CVE List CVE-2026-50566
- GitHub Advisory GHSA-m63v-2g9w-2w6v
- NVD CVE-2026-50566
- OSV GO-2026-5857
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