CVE-2026-40246
Unauthenticated deletion of Traffic Influence Subscriptions via 5G SB-I API
Is CVE-2026-40246 being exploited?
Not confirmed. CVE-2026-40246 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.38% probability of exploitation in the next 30 days.
How severe is CVE-2026-40246?
CVE-2026-40246 is rated High with a CVSS score of 8.7. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-40246?
Yes. A fix has been recorded for CVE-2026-40246. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-40246 affect?
CVE-2026-40246 affects free5GC UDR service (versions <= 1.4.2). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-40246?
Monitor SB-I access; restrict API usage; upgrade when patched.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Attacker can delete any Traffic Influence Subscription by manipulating influenceId; disrupts 5G policy state.
Monitor only
- affected<= 1.4.2
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.