Authorization Bypass Through User-Controlled Key Affecting unleash-server package, versions <8.0.3-r0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-MINIMOSLATEST-UNLEASHSERVER-20067771
- published24 Sept 2026
- disclosed22 Sept 2026
Introduced: 22 Sep 2026
NewCVE-2026-77425 (opens in a new tab)How to fix?
Upgrade Minimos:latest unleash-server to version 8.0.3-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream unleash-server package and not the unleash-server package as distributed by Minimos.
See How to fix? for Minimos:latest relevant fixed versions and status.
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.
References
- https://www.cve.org/CVERecord?id=CVE-2026-77425
- https://github.com/advisories/GHSA-5ffh-6f9q-5hhr
- https://osv.dev/vulnerability/MINI-vxjc-8pxf-ww8v
- https://osv.dev/vulnerability/CVE-2026-77425
- https://github.com/Unleash/unleash/commit/43e8db37b846921c8a94db58b44935ecbd15d9d1
- https://github.com/Unleash/unleash/releases/tag/v8.0.3
- https://github.com/Unleash/unleash/security/advisories/GHSA-5ffh-6f9q-5hhr