CVE-2026-40246: free5GC is an open-source implementation of the 5G core network

Q: How do I fix CVE-2026-40246?

webconsole: upgrade to newer than 1.4.2. Exact commands for each OS are on this page.

Q: Is CVE-2026-40246 being exploited?

CVE-2026-40246 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-2026-40246 affect?

CVE-2026-40246 affects webconsole. Severity is high (CVSS 7.5). free5GC is an open-source implementation of the 5G core network. In versions 1.4.2 and below of the UDR service, the handler for deleting Traffic Influence Subscriptions checks whether the influenceId path segment equals subs-to-notify, but

Q: How urgent is CVE-2026-40246?

Priority 44/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2026-40246 is a high-severity flaw (CVSS 7.5) affecting webconsole. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

free5GC is an open-source implementation of the 5G core network. In versions 1.4.2 and below of the UDR service, the handler for deleting Traffic Influence Subscriptions checks whether the influenceId path segment equals subs-to-notify, but does not return after sending the HTTP 404 response when validation fails. Execution continues and the subscription is deleted regardless. An unauthenticated attacker with access to the 5G Service Based Interf

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 68%)
CISA exploited list	No
Weakness	CWE-285
Published	2026-04-16
Last modified	2026-10-20

Publisher (CNA): GitHub, Inc. · Vendor: free5gc

Last updated 2026-10-20 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-16 22:16 UTCPublished CVE record published
2026-10-20 16:13 UTCUpdated Record last modified

free5gc webconsole UPGRADE

Affected: <= 1.4.2

Fixed in: newer than 1.4.2

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 1.4.2 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade webconsole

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-2026-40246?

webconsole: upgrade to newer than 1.4.2. Exact commands for each OS are on this page.

Is CVE-2026-40246 being exploited?

CVE-2026-40246 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-2026-40246 affect?

CVE-2026-40246 affects webconsole. Severity is high (CVSS 7.5). free5GC is an open-source implementation of the 5G core network. In versions 1.4.2 and below of the UDR service, the handler for deleting Traffic Influence Subscriptions checks whether the influenceId path segment equals subs-to-notify, but

How urgent is CVE-2026-40246?

Priority 44/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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