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TI-2026-34271 Aliases CVE-2026-46614GHSA-3g33-6vg6-27m8

Improper access control in fission

Priority MEDIUM 49CWE-284Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-284.

Summary

Fission is an open-source, Kubernetes-native serverless framework that simplifies the deployment of functions and applications on Kubernetes. Prior to version 1.23.0, the Fission router registers an internal-style route — /fission-function/<name> and /fission-function/<ns>/<name> — for every Function object, independent of whether any HTTPTrigger exists for that function. The route was mounted on the same listener as user-defined HTTPTriggers (svc/router, port 8888), so any caller who could reach the router could invoke any function by guessing its metadata.name (and namespace), bypassing the host / path / method / method-allow-list restrictions encoded in HTTPTrigger objects. This issue has been patched in version 1.23.0.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00353 29th percentileScored 2026-11-07
Fix Fixed fission (fission): 1.23.0github.com/fission/fission (Go): 1.23.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
fissionfissionbefore 1.23.01.23.0Patch availableCNA
—github.com/fission/fission (Go)before 1.23.01.23.0Patch availableGHSA-3g33-6vg6-27m8
  • fission Vendorfission Affected before 1.23.0 Fixed in 1.23.0 Patch available CNA
  • github.com/fission/fission (Go) Vendor— Affected before 1.23.0 Fixed in 1.23.0 Patch available GHSA-3g33-6vg6-27m8

Remediation

  • Fix · CNA fission (fission) Fixed in 1.23.0
  • Fix · GHSA-3g33-6vg6-27m8 github.com/fission/fission (Go) Fixed in 1.23.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-46614
  2. 2026-10-03 Alias added: GHSA-3g33-6vg6-27m8
  3. 2026-10-14 EPSS moved to the 50th–90th percentile
  4. 2026-10-25 EPSS moved to the below the 50th percentile

References

Advisory 1

Other 5

  • TI-2026-34273 Improper privilege management in fission CVSS 4.0HIGH 8.7
  • TI-2026-37288 Fission: Environment Runtime.Container and Builder.Container SecurityContext bypass allows privileged pod creation CVSS 3.1CRITICAL 9.9
  • TI-2026-37286 Fission Environment CRD podspec passthrough enables hostPID/hostNetwork/privileged pods, node escape CVSS 3.1CRITICAL 9.9
  • TI-2026-37285 Fission Container Executor Function PodSpec Injection Leading to Node Escape CVSS 3.1CRITICAL 9.9
  • TI-2026-37268 Fission Environment CRD PodSpec Injection Leading to Node Escape and Cluster Takeover CVSS 3.1CRITICAL 9.9
  • TI-2026-34270 Fission StorageSvc /v1/archive endpoint exposes unauthenticated CRUD over all function archives CVSS 3.1HIGH 8.8
See all 16 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences