How severe is CVE-2026-8731?

CVE-2026-8731 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2026-8731 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-8731?

CVE-2026-8731 affects Open5gs. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-8731?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-8731 have an EU (EUVD) identifier?

Yes. CVE-2026-8731 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30680.

When was CVE-2026-8731 published?

CVE-2026-8731 was published on 2026-05-17 and last updated on 2026-06-17.

CVE-2026-8731

CVE-2026-8731 is a medium-severity vulnerability in Open5gs with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-404.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.0
CVSS v4: 2.1
EPSS exploit prediction: 0% (30th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30680
Weakness: CWE-404
Affected product: Open5gs
Published: 2026-05-17
Last modified: 2026-06-17

Description

A vulnerability has been found in Open5GS up to 2.7.7. Affected is the function ogs_sbi_client_add in the library /lib/sbi/client.c of the component NRF. The manipulation of the argument client_pool leads to denial of service. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.

Frequently asked questions

What is CVE-2026-8731?: A vulnerability has been found in Open5GS up to 2.7.7. Affected is the function ogs_sbi_client_add in the library /lib/sbi/client.c of the component NRF. The manipulation of the argument client_pool leads to denial of service. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.
How severe is CVE-2026-8731?: CVE-2026-8731 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2026-8731 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-8731?: CVE-2026-8731 affects Open5gs. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-8731?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-8731 have an EU (EUVD) identifier?: Yes. CVE-2026-8731 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30680.
When was CVE-2026-8731 published?: CVE-2026-8731 was published on 2026-05-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:open5gs:open5gs:*:*:*:*:*:*:*:*

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