CVE-2026-8743: A vulnerability was found in Open5GS up to 2.7.6

Q: How do I fix CVE-2026-8743?

open5gs: upgrade to newer than 2.7.6. Exact commands for each OS are on this page.

Q: Is CVE-2026-8743 being exploited?

CVE-2026-8743 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-8743 affect?

CVE-2026-8743 affects open5gs. Severity is medium (CVSS 6.3). 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

Q: How urgent is CVE-2026-8743?

Priority 32/100. Public exploit reference

Routine

MEDIUM 6.3UPGRADE

CVE-2026-8743 is a medium-severity flaw (CVSS 6.3) affecting open5gs. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 81%)
CISA exploited list	No
Weakness	CWE-266, CWE-285
Published	2026-05-17
Last modified	2026-10-21

Publisher (CNA): VulDB · Vendor: open5gs

Last updated 2026-10-21 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-17 10:16 UTCPublished CVE record published
2026-10-21 09:17 UTCUpdated Record last modified

open5gs open5gs UPGRADE

Affected: <= 2.7.6

Fixed in: newer than 2.7.6

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy open5gs || rpm -q open5gs || open5gs --version

2. UPGRADE to newer than 2.7.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade open5gs

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade open5gs

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-8743?

open5gs: upgrade to newer than 2.7.6. Exact commands for each OS are on this page.

Is CVE-2026-8743 being exploited?

CVE-2026-8743 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-8743 affect?

CVE-2026-8743 affects open5gs. Severity is medium (CVSS 6.3). 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

How urgent is CVE-2026-8743?

Priority 32/100. Public exploit reference

Related CVEs

CVE-2026-8187 MEDIUM 5.3 UPGRADE A flaw has been found in Open5GS up to 2.7.7
CVE-2026-8186 MEDIUM 5.3 UPGRADE A vulnerability was detected in Open5GS up to 2.7.7
CVE-2026-8252 MEDIUM 4.3 UPGRADE A vulnerability was determined in Open5GS up to 2.7.7
CVE-2026-8266 MEDIUM 4.3 UPGRADE A vulnerability was detected in Open5GS up to 2.7.7
CVE-2026-8267 MEDIUM 4.3 UPGRADE A flaw has been found in Open5GS up to 2.7.7

References

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