Vulnerability · Published Sep 22, 2026 · Assigned by GitHub_M
CVE-2026-77426Unleash: Missing await on permission check + cross-project IDOR in admin API
High 7.1
In plain English
A high-severity authorization bypass via user-controlled key in unleash from Unleash. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Unleash is an open-source feature management platform. Prior to 8.0.3, the Unleash admin API contains five authorization vulnerabilities. POST /api/admin/segments/strategies assigns the Promise returned by hasPermission without awaiting it, allowing authenticated users to modify segment assignments without UPDATE_FEATURE_STRATEGY permission for the target project and environment. GET /api/admin/projects/:projectId/features/:featureName/environments/:environment/variants does not bind the requested feature to projectId, allowing cross-project variant configuration disclosure. GET .../strategies/:strategyId uses strategyId without validating the project and feature context, allowing cross-project strategy configuration disclosure. getEnvironmentInfo does not validate that the requested feature belongs to the supplied project, allowing cross-project environment information disclosure. PUT /:projectId/tags accepts feature identifiers without verifying that they belong to the URL project, allowing cross-project tag modification. This issue is fixed in version 8.0.3.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | unleash-server | 8.0.3 | GHSA-72h8-wp98-7hch |
Affected products (as reported)
Weakness: CWE-639, CWE-862 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
References
- https://github.com/Unleash/unleash/security/advisories/GHSA-72h8-wp98-7hch x_refsource_CONFIRM
- https://github.com/Unleash/unleash/commit/7bb2829fc40791aa478e8ffca149c11b0f9cb05a x_refsource_MISC
- https://github.com/Unleash/unleash/commit/ace121c922d2e3eb6f68d95b0b6ab2fc8d824ea1 x_refsource_MISC
- https://github.com/Unleash/unleash/commit/bea7effd3687425630423f662136d548e100154d x_refsource_MISC
- https://github.com/Unleash/unleash/commit/c93a963e95e1b7bf1bca2a7729282a48d0eb2f6a x_refsource_MISC
- https://github.com/Unleash/unleash/commit/dd61d0e10f5977a2e5de78df467c3a17c09fbcef x_refsource_MISC
- https://github.com/Unleash/unleash/releases/tag/v8.0.3 x_refsource_MISC