dbcve.org
Improper Access ControlWeakness · CWE-284

CVE-2026-49822

HIGH · 7.7 CVSS v3.1 Published 2026-06-10
Patch available
A vendor patch is available. No clean upgrade release — apply the published patch.
See remediation →
83/100
Remediation priority · High
Remotely reachable Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
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 low-privilege developer who could create a KubernetesWatchTrigger (KWT) in their own namespace was able to establish a persistent surveillance channel over any other namespace. This issue has been patched in version 1.24.0.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis
How this class of weakness works · CWE-284

The application fails to correctly restrict what a user can do or reach, so functions or resources are available to people who should not have them. Attackers simply probe for the paths where the check is missing or wrong. The fix is to enforce access-control decisions consistently on every request, evaluated against the acting user rather than assumed from context.

General guidance for the improper access control class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
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

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Patch available Apply the vendor patch
Vendor patch github.com →
Recommended fix High confidence

1.24.0

  1. Identify your current Fission installation method (Helm, YAML manifests, or operator)
  2. If installed via Helm, run 'helm list -n fission' to identify the release name and current version
  3. Upgrade Fission to version 1.24.0 or later using your installation method
  4. For Helm: run 'helm upgrade <release-name> fission-charts/fission-all --namespace fission -v <version>' where version is 1.24.0 or higher
  5. If using YAML manifests, download and apply the manifests from Fission 1.24.0 release
  6. Verify the upgrade was successful by checking the Fission deployment and confirming version 1.24.0 is running
  7. Test that KubernetesWatchTrigger functionality works correctly in your environment
  8. Ensure no residual vulnerabilities by confirming the access control fix from PR #3379 is included
Caveat Review Fission 1.24.0 release notes for any changes to KubernetesWatchTrigger behavior or API modifications that may affect existing configurations

Generated from the published advisory — verify against the referenced sources before acting.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-49822 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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