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PatchSiren cyber security CVE debrief

CVE-2026-8267 Open5GS CVE debrief

A denial of service vulnerability was found in Open5GS up to 2.7.7 in the SMF component. The vulnerability affects the function smf_nsmf_handle_created_data_in_vsmf. The attack may be initiated remotely. The project was informed of the problem early through an issue report but has not responded yet. Users should review their installations and consider compensating controls. This vulnerability has been publicly disclosed and may be used by attackers.

Vendor
Open5GS
Product
Open5GS
CVSS
LOW 2.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-05-11
Original CVE updated
2026-07-23
Advisory published
2026-05-11
Advisory updated
2026-07-23

Who should care

Users of Open5GS up to version 2.7.7 should be aware of this denial of service vulnerability and take necessary precautions. This includes reviewing their installations, applying patches when available, and monitoring for unusual activity in the SMF component. Affected operator, platform, vulnerability-management, and security-team impact should be reviewed.

Technical summary

The vulnerability is caused by a flaw in the smf_nsmf_handle_created_data_in_vsmf function of the SMF component in Open5GS up to 2.7.7. This manipulation causes denial of service. The attack may be initiated remotely. The vulnerability has been publicly disclosed and may be used by attackers. Affected product deployments should be reviewed for potential exposure, and defenders should verify the SMF component's configuration and monitor for unusual activity.

Defensive priority

Low priority due to CVSS score of 2.1 and lack of known exploit usage. However, defenders should still review and verify affected scope and severity, and consider compensating controls.

Recommended defensive actions

  • Inventory and verify Open5GS installations up to version 2.7.7
  • Apply vendor patches or updates when available
  • Monitor for unusual activity in SMF component
  • Consider compensating controls such as network segmentation
  • Review and verify affected scope and severity
  • Track exceptions and retest remediated assets
  • Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance

Evidence notes

The CVE record was published on 2026-05-11T04:16:20.233Z and was last modified on 2026-07-23T20:10:00.130Z. The NVD entry is currently Analyzed. The vulnerability affects Open5GS up to version 2.7.7. The attack may be initiated remotely. The project was informed of the problem early through an issue report but has not responded yet. Evidence limits suggest that defenders should verify the SMF component's configuration and monitor for unusual activity.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-05-11T04:16:20.233Z and has not been modified since then. The NVD entry is currently Analyzed.