How severe is CVE-2026-8743?

CVE-2026-8743 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-8743 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-8743?

CVE-2026-8743 affects Open5gs. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-8743?

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

Does CVE-2026-8743 have an EU (EUVD) identifier?

Yes. CVE-2026-8743 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30691.

When was CVE-2026-8743 published?

CVE-2026-8743 was published on 2026-05-17 and last updated on 2026-06-17.

CVE-2026-8743

CVE-2026-8743 is a medium-severity vulnerability in Open5gs with a CVSS 3.x base score of 6.3. 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-266.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
CVSS v2: 6.5
CVSS v4: 2.1
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30691
Weakness: CWE-266
Affected product: Open5gs
Published: 2026-05-17
Last modified: 2026-06-17

Description

A vulnerability was found in Open5GS up to 2.7.6. This impacts the function ran_ue_find_by_amf_ue_ngap_id of the file src/amf/context.c of the component AMF/MME. Performing a manipulation results in improper authorization. It is possible to initiate the attack remotely. The exploit has been made public and could be used. The patch is named 5746b8576cfceec18ed87eb7d8cf11b1fb4cd8b1. It is suggested to install a patch to address this issue.

Frequently asked questions

What is CVE-2026-8743?: A vulnerability was found in Open5GS up to 2.7.6. This impacts the function ran_ue_find_by_amf_ue_ngap_id of the file src/amf/context.c of the component AMF/MME. Performing a manipulation results in improper authorization. It is possible to initiate the attack remotely. The exploit has been made public and could be used. The patch is named 5746b8576cfceec18ed87eb7d8cf11b1fb4cd8b1. It is suggested to install a patch to address this issue.
How severe is CVE-2026-8743?: CVE-2026-8743 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-8743 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-8743?: CVE-2026-8743 affects Open5gs. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-8743?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-8743 have an EU (EUVD) identifier?: Yes. CVE-2026-8743 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30691.
When was CVE-2026-8743 published?: CVE-2026-8743 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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