CVE-2026-1738 Open5GS SGWC context.c sgwc_tunnel_add assertion
Remote attackers can trigger a reachable assertion in Open5GS SGWC, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-1738?
CVE-2026-1738 is a medium-severity denial of service vulnerability in Open5gs Open5gs, published on 2 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A flaw has been found in Open5GS up to 2.7.6. The impacted element is the function sgwc_tunnel_add of the file /src/sgwc/context.c of the component SGWC. Executing a manipulation of the argument pdr can lead to reachable assertion. The attack can be executed remotely. The exploit has been published and may be used. It is advisable to implement a patch to correct this issue. The issue report is flagged as already-fixed.
Weakness: CWE-617
Which versions are affected by CVE-2026-1738?
It affects 1 product.
Products include Open5gs Open5gs.
How do I fix CVE-2026-1738?
No fix has been published for CVE-2026-1738 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-1738 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-1738 exists.
Other vulnerabilities in Open5gs Open5gs
Sources
Also known as GHSA-3242-rqgf-8x5v.