HOMEVULNERABILITIESCVE-2026-8743
MEDIUM

CVE-2026-8743

CWE-266Published: May 17, 2026· Updated: May 19, 2026

6.3
CVSS v3.1
EPSS:0.04%probability of exploitation in 30 daysPercentile:11.9th

Official 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.

NVD Source

Technical Analysis

CVE-2026-8743 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityLow
AvailabilityLow
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Affected Vendors & Products

open5gs1 product
open5gs
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/open5gs/open5gs/commit/5746b8576cfceec18ed87eb7d8cf11b1fb4cd8b1
PATCHhttps://github.com/open5gs/open5gs/pull/4553
ADVISORYhttps://vuldb.com/submit/814559
ADVISORYhttps://vuldb.com/vuln/364330

All References (7)

→
https://github.com/open5gs/open5gs/Product
→
https://github.com/open5gs/open5gs/commit/5746b8576cfceec18ed87eb7d8cf11b1fb4cd8b1Patch
→
https://github.com/open5gs/open5gs/issues/4498Exploit · Issue Tracking
→
https://github.com/open5gs/open5gs/pull/4553Issue Tracking · Patch
→
https://vuldb.com/submit/814559Third Party Advisory · VDB Entry
→
https://vuldb.com/vuln/364330Third Party Advisory · VDB Entry
→
https://vuldb.com/vuln/364330/ctiPermissions Required · VDB Entry

Quick Facts

CVE IDCVE-2026-8743
CVSS Score6.3 / 10
SeverityMEDIUM
WeaknessCWE-266
CISA KEVNo
EPSS (30d)0.04%
Affected1 vendor
PublishedMay 17, 2026

Related CVEs (CWE-266)

CVE-2026-42368
9.9
CVE-2026-32922
9.9
CVE-2026-56030
9.8
CVE-2026-4194
9.8
CVE-2026-27051
9.8
CVE-2026-39583
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-8743 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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