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CVE-2026-53647: FOSSBilling is a free, open-source billing and client management system. In versions 0.5.3 through 0.7.2, the Guest `serviceapikey/get_info` API endpoint is accessible without auth

unknownpublic exploitCVE-2026-53647
FOSSBilling is a free, open-source billing and client management system. In versions 0.5.3 through 0.7.2, the Guest serviceapikey/get_info API endpoint is accessible without authentication. Any caller with a valid API key can retrieve all custom configuration parameters (custom_* fields) stored in the key's database record. These custom fields are populated by billing administrators and can contain business-sensitive data such as pricing tiers, feature flags, rate limits, expiry overrides, or access scope data. Version 0.8.0 patches the issue. Some workarounds are available. Administrators can avoid storing sensitive data in custom_* API key configuration fields, monitor API logs for suspicious calls to /api/guest/serviceapikey/get_info, and/or disable the Serviceapikey module if not in active use.

Details

Source
NVD Recent CVEs (US · database · site)
Severity
unknown
Published
2026-07-07
Last updated
2026-07-07
Exploitation
Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-53647

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-53647coverage & exploitation statusNVD · CVE.org

Recent advisories for FOSSBilling is a

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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