What’s Vulnerable › Vulnerabilities

CVE-2026-1586: Open5GS SGWC s11-handler.c ogs_gtp2_f_teid_to_ip denial of service

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-01-29 · updated 2026-06-17
• Weakness: CWE-404

Description

A flaw has been found in Open5GS up to 2.7.5. Impacted is the function ogs_gtp2_f_teid_to_ip of the file /sgwc/s11-handler.c of the component SGWC. Executing a manipulation can lead to denial of service. The attack may be performed from remote. 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.

Affected products

• Open5GS: before 2.7.6 — fixed in 2.7.6

How to fix

Upgrade to a fixed version: Open5GS 2.7.6. Check the vendor advisory for mitigations.

References

• https://github.com/open5gs/open5gs/
• https://github.com/open5gs/open5gs/issues/4273
• https://github.com/open5gs/open5gs/issues/4273#event-21968643659
• https://github.com/open5gs/open5gs/issues/4273#issue-3796030721
• https://vuldb.com/?ctiid.343349
• https://vuldb.com/?id.343349
• https://vuldb.com/?submit.738375

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