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TI-2026-54010 Aliases CVE-2026-77425GHSA-5ffh-6f9q-5hhr

Authorization bypass in unleash

Priority MEDIUM 53CWE-639Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · 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, POST /api/admin/projects/:projectId/features/:featureName/environments/:environment/strategies/set-sort-order passes attacker-controlled strategy IDs to unprotectedUpdateStrategiesSortOrder and updateSortOrder without verifying that the IDs belong to the project, feature, and environment authorized by the URL. In a multi-project Pro or Enterprise deployment, an authenticated user with UPDATE_FEATURE_STRATEGY in one project who knows another project's strategy IDs can reorder those strategies, changing feature evaluation precedence while the operation is attributed to the attacker's URL context rather than the affected project. The single-project OSS edition lacks the cross-project dimension, although the missing context binding still permits unauthorized reordering across features or environments in the default project. The endpoint changes only sort_order and does not modify strategy parameters, constraints, or segments. This issue is fixed in version 8.0.3.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00325 25th 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-5ffh-6f9q-5hhr
  • 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-5ffh-6f9q-5hhr

Remediation

  • Fix · CNA unleash (Unleash) Fixed in 8.0.3
  • Fix · GHSA-5ffh-6f9q-5hhr unleash-server (npm) Fixed in 8.0.3 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-77425
  2. 2026-10-03 Alias added: GHSA-5ffh-6f9q-5hhr

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-2026-53733 Unleash: Clone-feature lets a user copy a feature from a project they cannot read CVSS 4.0MEDIUM 5.3
  • 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