CVE-2026-8743: Open5GS

Open5GS AMF/MME context.c ran_ue_find_by_amf_ue_ngap_id improper authorization

CVSS 5.3 MediumEPSS 0.0027 · 19th percentile

Published by the CVE Program (CNA: VulDB) at 17 May 2026, 09:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Not given	Open5GS	affected 2.7.0 affected 2.7.1 affected 2.7.2 affected 2.7.3 affected 2.7.4 affected 2.7.5 affected 2.7.6

Identifiers

CVE-2026-8743

CNA

VulDB

Weakness (CWE)

CWE-266 · CWE-285

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
5.3	Medium	4.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P	CNA (VulDB)Used for this record
6.3	Medium	3.1	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C	CNA (VulDB)
6.3	Medium	3.0	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C	CNA (VulDB)
6.5	Medium	2.0	AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:OF/RC:C	CNA (VulDB)

CISA KEV Not listed.
EPSS 0.0027, the 19th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 17 May 2026. New records show when each source confirmed them.

Sources

References from the CNA

vuldb.com/vuln/364330 vdb-entrytechnical-description
vuldb.com/vuln/364330/cti signaturepermissions-required
vuldb.com/cve/CVE-2026-8743 third-party-advisory
vuldb.com/submit/814559 third-party-advisory
github.com/open5gs/open5gs/pull/4553 issue-trackingpatch
github.com/open5gs/open5gs/commit/5746b8576cfceec18ed87eb7d8cf11b1fb4cd8b1 patch
github.com/open5gs/open5gs/ product
github.com/open5gs/open5gs/issues/4498 exploitissue-tracking

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.