How severe is CVE-2026-8251?

CVE-2026-8251 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-2026-8251 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-8251?

CVE-2026-8251 affects Open5gs. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-8251?

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

Does CVE-2026-8251 have an EU (EUVD) identifier?

Yes. CVE-2026-8251 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29005.

When was CVE-2026-8251 published?

CVE-2026-8251 was published on 2026-05-10 and last updated on 2026-06-17.

CVE-2026-8251

CVE-2026-8251 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% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-29005
Weakness: CWE-404
Affected product: Open5gs
Published: 2026-05-10
Last modified: 2026-06-17

Description

A vulnerability was found in Open5GS up to 2.7.7. This impacts the function update_authorized_pcc_rule_and_qos of the file /src/smf/npcf-handler.c of the component SMF. Performing a manipulation results in denial of service. The attack is possible to be carried out remotely. The exploit has been made public and could 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-2026-8251?: A vulnerability was found in Open5GS up to 2.7.7. This impacts the function update_authorized_pcc_rule_and_qos of the file /src/smf/npcf-handler.c of the component SMF. Performing a manipulation results in denial of service. The attack is possible to be carried out remotely. The exploit has been made public and could be used. The project was informed of the problem early through an issue report but has not responded yet.
How severe is CVE-2026-8251?: CVE-2026-8251 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-2026-8251 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-8251?: CVE-2026-8251 affects Open5gs. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-8251?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-8251 have an EU (EUVD) identifier?: Yes. CVE-2026-8251 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29005.
When was CVE-2026-8251 published?: CVE-2026-8251 was published on 2026-05-10 and last updated on 2026-06-17.

References

Affected products (1)

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

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