CVE-2026-1522 Open5GS SGWC s5c-handler.c sgwc_s5c_handle_modify_bearer_response denial of service
Remote attackers can cause a denial of service in Open5GS SGWC by manipulating modify bearer response messages, requiring a patch for mitigation.
- 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-2026-1522?
CVE-2026-1522 is a medium-severity denial of service vulnerability in Open5gs Open5gs, published on 28 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A weakness has been identified in Open5GS up to 2.7.6. This vulnerability affects the function sgwc_s5c_handle_modify_bearer_response of the file src/sgwc/s5c-handler.c of the component SGWC. Executing a manipulation can lead to denial of service. The attack can be launched remotely. The exploit has been made available to the public and could be used for attacks. This patch is called b19cf6a. Applying a patch is advised to resolve this issue. The issue report is flagged as already-fixed.
Weakness: CWE-404
Which versions are affected by CVE-2026-1522?
It affects 1 product.
Products include Open5gs Open5gs.
How do I fix CVE-2026-1522?
No fix has been published for CVE-2026-1522 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-2026-1522 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-1522 exists.
Other vulnerabilities in Open5gs Open5gs
Sources
Also known as GHSA-4p7v-9jxw-m3mp.