Buffer overflow in Open5gs
CVE-2026-90707
A security flaw has been discovered in Open5GS up to 2.7.x. Affected is the function amf_nnrf_try_old_amf_discovery_fallback of the file src/amf/nnrf-handler.c of the component Old AMF Discovery Fallback. The manipulation of the argument discovery_option results in use after free. The attack may be performed from remote. The patch is identified as ddd683a35f8aaac2b7b9884a24cd53bddfc65238. Applying a patch is advised to resolve this issue.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.005 (44.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 44.6% 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
Affected products
- Open5gs — versions 2.0, 2.1, 2.2
Weakness classification (CWE)
References
- vuldb.com/vuln/403249 (technical-description, vdb-entry)
- vuldb.com/vuln/403249/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-90707 (third-party-advisory)
- vuldb.com/submit/918267 (third-party-advisory)
- github.com/open5gs/open5gs/pull/4698 (issue-tracking, patch)
- github.com/open5gs/open5gs/commit/ddd683a35f8aaac2b7b9884a24cd53bddfc65238 (patch)
- github.com/open5gs/open5gs/ (product)
Frequently asked questions
- What is CVE-2026-90707?
- CVE-2026-90707 is a high-severity vulnerability in Open5gs, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.3/10. Published 2026-09-14.
- How severe is CVE-2026-90707?
- High severity. CVSS v3 base score is 8.3 out of 10.