CVE-2026-75554

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Source

https://cve.org/CVERecord?id=CVE-2026-75554

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-75554.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-75554

Aliases

EEF-CVE-2026-75554
GHSA-24ww-j3f4-p49c

Published

2026-08-24T20:15:05.791Z

Modified

2026-09-03T03:30:45.582465676Z

Severity

2.3 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N CVSS Calculator

Summary

Explicit organization scopes survive token refresh after membership ends

Details

Insufficient Session Expiration vulnerability in the OAuth token refresh grant in hexpm hexpm allows a user removed from an organization to keep reading its private packages.

expandrepositoriesscope/3 in lib/hexpm/permissions.ex only rewrites the literal repositories scope, so an explicitly granted repository:<org> or docs:<org> scope passes through it untouched. The refresh grant re-derives a new token from the stored granted_scopes, which holds that expanded form, so every refresh reproduces the organization scope without revisiting membership. Because both CDN edges authorize repository access from the token claim without querying the database, an account removed from an organization retains read access for as long as it keeps refreshing, bounded by the 30 day refresh token lifetime rather than the 30 minute access token lifetime.

This issue affects hex.pm: from 2025-10-10 before 2026-08-24.

Database specific

{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75554.json",
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "introduced": "2025-10-10"
                },
                {
                    "fixed": "2026-08-24"
                },
                {
                    "introduced": "650faa03af511e74c1b3b49ec12d35666b6984c4"
                },
                {
                    "fixed": "50cffd206490c49c92d7b63c8505949682abedb0"
                }
            ]
        },
        {
            "source": "DESCRIPTION",
            "extracted_events": [
                {
                    "introduced": "2025-10-10"
                },
                {
                    "fixed": "2026-08-24"
                }
            ]
        }
    ],
    "cna_assigner": "EEF",
    "cwe_ids": [
        "CWE-613"
    ]
}

References

Affected packages

Git / github.com/hexpm/hexpm

Affected ranges

Type

GIT

Repo

https://github.com/hexpm/hexpm

Events

Introduced

Fixed

50cffd206490c49c92d7b63c8505949682abedb0

Database specific

Show details

{
    "source": "REFERENCES"
}

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-75554.json"