CVE-2026-8746: A security flaw has been discovered in Open5GS up to 2.7.7

Q: How do I fix CVE-2026-8746?

open5gs: upgrade to newer than 2.7.7. Exact commands for each OS are on this page.

Q: Is CVE-2026-8746 being exploited?

CVE-2026-8746 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-2026-8746 affect?

CVE-2026-8746 affects open5gs. Severity is medium (CVSS 4.3). A security flaw has been discovered in Open5GS up to 2.7.7. Affected by this issue is the function discover_handler in the library /lib/sbi/nghttp2-server.c of the component NRF. The manipulation results in use after free. The attack can be

Q: How urgent is CVE-2026-8746?

Priority 28/100. Public exploit reference

Routine

MEDIUM 4.3UPGRADE

CVE-2026-8746 is a medium-severity flaw (CVSS 4.3) affecting open5gs. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A security flaw has been discovered in Open5GS up to 2.7.7. Affected by this issue is the function discover_handler in the library /lib/sbi/nghttp2-server.c of the component NRF. The manipulation results in use after free. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 70%)
CISA exploited list	No
Weakness	CWE-119, CWE-416
Published	2026-05-17
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: open5gs

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-17 11:16 UTCPublished CVE record published
2026-06-17 11:04 UTCUpdated Record last modified

open5gs open5gs UPGRADE

Affected: <= 2.7.7

Fixed in: newer than 2.7.7

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 2.7.7 (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-2026-8746?

open5gs: upgrade to newer than 2.7.7. Exact commands for each OS are on this page.

Is CVE-2026-8746 being exploited?

CVE-2026-8746 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-2026-8746 affect?

CVE-2026-8746 affects open5gs. Severity is medium (CVSS 4.3). A security flaw has been discovered in Open5GS up to 2.7.7. Affected by this issue is the function discover_handler in the library /lib/sbi/nghttp2-server.c of the component NRF. The manipulation results in use after free. The attack can be

How urgent is CVE-2026-8746?

Priority 28/100. Public exploit reference

Related CVEs

CVE-2026-8743 MEDIUM 6.3 UPGRADE A vulnerability was found in Open5GS up to 2.7.6
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

References

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