Vulnerability in Open5gs
CVE-2026-108105
Open5GS through 2.8.0 contains a reachable assertion vulnerability in mme_gn_handle_sgsn_context_request() that allows remote unauthenticated attackers to crash the MME via malformed SGSN Address IEs. Attackers sending GTPv1-C traffic from a configured SGSN address with a known UE IMSI or P-TMSI can supply an invalid address length to terminate open5gs-mmed, denying service to all subscribers.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
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
Weakness classification (CWE)
References
- github.com/open5gs/open5gs/commit/346ce7a5e5cf2812bac3af042b5afba35bcf4f89 (patch)
- github.com/open5gs/open5gs (product)
- github.com/open5gs/open5gs/security/advisories/GHSA-9crh-64c8-56q6 (vendor-advisory)
- github.com/open5gs/open5gs/blob/v2.8.0/src/mme/mme-gn-handler.c (technical-description)
- www.vulncheck.com/advisories/open5gs-through-2.8.0-mme-reachable-assertion-via-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-108105?
- CVE-2026-108105 is a medium-severity vulnerability in Open5gs, classified under Reachable Assertion. CVSS score: 5.9/10. Published 2026-10-09.
- How severe is CVE-2026-108105?
- Medium severity. CVSS v3 base score is 5.9 out of 10.