🛡️ CVE-2026-27604

⚪ Unknown ✅ No Known Exploit CWE-200 NVD
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

FOSSBilling is a free, open-source billing and client management system. Starting in version 0.5.4 and prior to version 0.8.0, an authorization bypass in the API role handling allows unauthenticated access to privileged /api/system/* endpoints. Because system resolves to the cron admin identity, attackers can invoke admin API methods without valid credentials, session, or CSRF token. Version 0.8.0 patches the issue. Some workarounds are available. Block external access to /api/system/* at reverse proxy/WAF, restrict API access by trusted source IPs only (api.allowed_ips), rotate all admin/client API tokens immediately, invalidate active sessions and reset high-privilege credentials, and/or review API request logs for suspicious /api/system/ access and treat as potential incident.

Weakness class

CVE-2026-27604 is classified as CWE-200: Exposure of Sensitive Information. Information that should stay internal is disclosed to someone who is not authorised to see it.

Affected software

CVE-2026-27604 is recorded against 1 package.

  • unknown

Timeline and source

Published on 23 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

github.com
github.com
www.vulncheck.com

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE CWE-200
Public Exploit ✅ No
Source NVD
Published 2026-06-23
Updated 2026-08-11
Modified 2026-06-23
Fix URL N/A

Affected Packages

Software From version Fixed in
unknown — —

Similar Threats

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