CVE-2026-86241
CVE-2026-86241
A weakness has been identified in liufee FeehiCMS up to 2.1.1. This impacts an unknown function of the file environments/prod/backend/config/main-local.php of the component Cookie Validation. This manipulation of the argument cookieValidationKey causes use of hard-coded cryptographic key . The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (41.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.000
Weakness classification (CWE)
References
- vuldb.com/vuln/399398 (technical-description, vdb-entry)
- vuldb.com/vuln/399398/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-86241 (third-party-advisory)
- vuldb.com/submit/901836 (third-party-advisory)
- github.com/liufee/cms/issues/96 (issue-tracking)
- github.com/yang5ynag/cve/blob/main/FEHI-003-Empty-cookieValidationKey.md (exploit)
Frequently asked questions
- What is CVE-2026-86241?
- CVE-2026-86241 is a medium-severity vulnerability, classified under CWE-320. CVSS score: 4.3/10. Published 2026-09-07.
- How severe is CVE-2026-86241?
- Medium severity. CVSS v3 base score is 4.3 out of 10.