CVE-2026-1522: Open5GS SGWC s5c-handler.c sgwc_s5c_handle_modify_bearer_response denial of service

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-01-28 · updated 2026-06-17
Weakness: CWE-404

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.

Affected products

Open5GS: through 2.7.6

References

https://github.com/open5gs/open5gs/
https://github.com/open5gs/open5gs/commit/b19cf6a
https://github.com/open5gs/open5gs/issues/4266
https://github.com/open5gs/open5gs/issues/4266#event-21968568116
https://github.com/open5gs/open5gs/issues/4266#issue-3794991595
https://vuldb.com/?ctiid.343193
https://vuldb.com/?id.343193
https://vuldb.com/?submit.738371

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