OAuth token exchange grants repository scopes for organizations the principal cannot access
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| hexpm | hexpm | unaffected |
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| hexpm | hexpm | unaffected |
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No data.
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| Hexpm | Hexpm |
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| Hexpm | Hexpm |
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No CVSS v3.1
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.460% probability within 30 days)
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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| Description | Incorrect Authorization vulnerability in the OAuth token endpoint in hexpm hexpm allows an API key holding the repositories permission to read another organization's private packages. When an API key is exchanged for a token through the OAuth client_credentials grant, validate_scopes_against_key/2 in lib/hexpm_web/controllers/api/oauth_controller.ex admits a requested scope whenever the key carries the repositories permission and the scope string begins with repository:. The organization name is never resolved against the principal, and expand_repositories_scope/3 only rewrites the literal repositories scope, so an explicit repository:<name> passes through untouched. Both CDN edges authorize repository access from the token claim without querying the database, so the minted token is read access to that organization's private packages until it expires. This issue affects hex.pm: from 2025-10-18 before 2026-08-24. | |
| Title | OAuth token exchange grants repository scopes for organizations the principal cannot access | |
| First Time appeared |
Hexpm
Hexpm hexpm |
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| Weaknesses | CWE-863 | |
| CPEs | cpe:2.3:a:hexpm:hexpm:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Hexpm
Hexpm hexpm |
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| References |
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| Metrics |
cvssV4_0
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