Fission: Cross-namespace Environment reference in Package allows build-time command execution and SA token exfiltration

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Summary

CVECVE-2026-49821
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-10 18:17:10 UTC
Updated2026-06-10 19:37:41 UTC
DescriptionFission 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's buildermgr controller processed Package CRDs without verifying that Package.spec.environment.namespace matched Package.metadata.namespace. This issue has been patched in version 1.24.0.

Risk And Classification

Primary CVSS: v3.1 7.7 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Problem Types: CWE-441 | CWE-862 | CWE-441 CWE-441: Unintended Proxy or Intermediary ('Confused Deputy') | CWE-862 CWE-862: Missing Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.7HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
3.1CNADECLARED7.7HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Fission Fission affected < 1.24.0 Not specified

References

ReferenceSourceLinkTags
github.com/fission/fission/releases/tag/v1.24.0 [email protected] github.com
github.com/fission/fission/pull/3379 [email protected] github.com
github.com/fission/fission/security/advisories/GHSA-vjhc-cf4p-72q4 [email protected] github.com
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