Auth bypass in Billabear
CVE-2026-116257
A vulnerability was determined in BillaBear up to 2025.01.03. Affected by this issue is the function processInstall of the file src/BillaBear/Controller/InstallController.php of the component Installation Handler. This manipulation causes missing authentication. Remote exploitation of the attack is possible. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Billabear — versions 2025.01.03
Weakness classification (CWE)
References
- vuldb.com/vuln/426296 (technical-description, vdb-entry)
- vuldb.com/vuln/426296/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-116257 (third-party-advisory)
- vuldb.com/submit/1009909 (third-party-advisory)
- gist.github.com/asdfghjkl12345678910111/d9fcbcdf74b3f07c427ade9fed927ad4 (exploit)
Frequently asked questions
- What is CVE-2026-116257?
- CVE-2026-116257 is a high-severity vulnerability in Billabear, classified under Improper Authentication. CVSS score: 7.3/10. Published 2026-10-26.
- How severe is CVE-2026-116257?
- High severity. CVSS v3 base score is 7.3 out of 10.