Vulnerability in Open5gs
CVE-2026-78186
A flaw has been found in Open5GS up to 2.8.0. This affects an unknown function of the file src/hss/hss-cx-path.c of the component HSS. This manipulation of the argument User-Name causes reachable assertion. The attack is possible to be carried out remotely. The exploit has been published and may be used. Patch name: c9abe09421eb99bbf1cd7862a3d375e58a4eb9e4. It is recommended to apply a patch to fix this issue.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.005 (43.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 43.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.001
Affected products
- Open5gs — versions 2.0, 2.1, 2.2
Weakness classification (CWE)
References
- vuldb.com/vuln/394568 (technical-description, vdb-entry)
- vuldb.com/vuln/394568/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-78186 (third-party-advisory)
- vuldb.com/submit/885203 (third-party-advisory)
- github.com/open5gs/open5gs/issues/4675 (issue-tracking, exploit)
- github.com/open5gs/open5gs/commit/c9abe09421eb99bbf1cd7862a3d375e58a4eb9e4 (patch)
- github.com/open5gs/open5gs/ (product)
Frequently asked questions
- What is CVE-2026-78186?
- CVE-2026-78186 is a medium-severity vulnerability in Open5gs, classified under Reachable Assertion. CVSS score: 4.3/10. Published 2026-08-24.
- How severe is CVE-2026-78186?
- Medium severity. CVSS v3 base score is 4.3 out of 10.