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TI-2026-53733 Aliases CVE-2026-76910GHSA-8xcj-9hfr-fh9j

Unleash: Clone-feature lets a user copy a feature from a project they cannot read

Priority MEDIUM 57CWE-639Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-639.

Summary

Unleash is an open-source feature management platform. Prior to 8.0.3, cloneFeatureToggle and POST /api/admin/projects/:projectId/features/:featureName/clone authorize creation in the destination project but do not verify access to the source project. Because feature names are globally unique, a user with create or clone permission in one project who knows or guesses another project's feature name can copy that feature into the authorized project and inspect its strategy parameters, constraints, variants, and variant payloads. This issue is fixed in version 8.0.3.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00414 35th percentileScored 2026-11-07
Fix Fixed unleash (Unleash): 8.0.3unleash-server (npm): 8.0.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
Unleashunleashbefore 8.0.38.0.3Patch availableCNA
—unleash-server (npm)before 8.0.38.0.3Patch availableGHSA-8xcj-9hfr-fh9j
  • unleash VendorUnleash Affected before 8.0.3 Fixed in 8.0.3 Patch available CNA
  • unleash-server (npm) Vendor— Affected before 8.0.3 Fixed in 8.0.3 Patch available GHSA-8xcj-9hfr-fh9j

Remediation

  • Fix · CNA unleash (Unleash) Fixed in 8.0.3
  • Fix · GHSA-8xcj-9hfr-fh9j unleash-server (npm) Fixed in 8.0.3 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-76910
  2. 2026-10-03 Alias added: GHSA-8xcj-9hfr-fh9j

References

Other 4

  • TI-2026-45230 Unleash: Unauthenticated single-request DoS via OpenAPI validation error formatter CVSS 3.1HIGH 7.5
  • TI-2026-45005 Server-side request forgery in unleash CVSS 3.1MEDIUM 5.5
  • TI-2026-54010 Authorization bypass in unleash CVSS 3.1MEDIUM 4.3
  • TI-2026-54011 Unleash: Missing await on permission check + cross-project IDOR in admin API CVSS 4.0HIGH 7.1
  • TI-2026-45232 Improper output encoding in unleash CVSS 3.1MEDIUM 4.1
  • TI-2026-53732 Unleash: CR-approval email renders user-controlled raw HTML CVSS 4.0LOW 2.1

Sources

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