Auth bypass in Floragunn Search Guard Flx
CVE-2026-4818
In Search Guard FLX versions from 3.0.0 up to 4.0.1, there exists an issue which allows users without the necessary privileges to execute some management operations against data streams.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.003 (23.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 23.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Floragunn Search Guard Flx — versions 3.0.0
- Search-Guard Flx
Weakness classification (CWE)
References
- search-guard.com/cve-advisory/ (Vendor Advisory)
- docs.search-guard.com/latest/changelog-searchguard-flx-4_1_0 (Release Notes)
Frequently asked questions
- What is CVE-2026-4818?
- CVE-2026-4818 is a medium-severity vulnerability in Floragunn Search Guard Flx, classified under Improper Authorization. CVSS score: 6.8/10. Published 2026-03-31.
- How severe is CVE-2026-4818?
- Medium severity. CVSS v3 base score is 6.8 out of 10.