CVE-2026-40246

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-04-14. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 Interface can delete arbitrary Traffic Influence Subscriptions by supplying any value for the influenceId path segment, while the API misleadingly returns a 404 Not Found response. A patched version was not available at the time of publication.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
65(Attend)
EG Risk 65/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS
30.5%
KEV
Not listed

Published

April 16, 2026

Last Modified

April 21, 2026

Advisory Details (1)

Auto-updated Jun 11, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

UDR improper path validation allows unauthenticated deletion of Traffic Influence Subscriptions · Advisory · free5gc/free5gc · GitHub

https://github.com/free5gc/free5gc/security/advisories/GHSA-g9cw-qwhf-24jp

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
gogithub.com/free5gc/udr—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/free5gc/udr———

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 35× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 104 total refreshes for this CVE.

  1. 2026-07-23 03:11 UTCEG score recompute
  2. 2026-07-22 14:08 UTCEPSS rescore
  3. 2026-07-21 15:24 UTCEPSS rescore
  4. 2026-07-20 17:08 UTCEPSS rescore
  5. 2026-07-19 14:31 UTCEPSS rescore
  6. 2026-07-19 02:29 UTCEPSS rescore
  7. 2026-07-18 10:04 UTCEPSS rescore
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  11. 2026-07-15 02:00 UTCEPSS rescore
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  15. 2026-07-12 05:46 UTCEPSS rescore
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  17. 2026-07-09 19:10 UTCEPSS rescore
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  1. 2026-07-01 15:06 UTCEPSS rescore
  2. 2026-06-30 23:22 UTCEPSS rescore
  3. 2026-06-29 14:06 UTCEPSS rescore
  4. 2026-06-28 14:07 UTCEPSS rescore
  5. 2026-06-28 04:56 UTCEPSS rescore
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  7. 2026-06-25 13:49 UTCEPSS rescore
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  9. 2026-06-24 14:05 UTCEPSS rescore
  10. 2026-06-23 21:33 UTCEPSS rescore
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  20. 2026-06-16 17:52 UTCEPSS rescore
  21. 2026-06-15 17:49 UTCEPSS rescore
  22. 2026-06-14 19:51 UTCGHSA enrichment
  23. 2026-06-12 23:12 UTCEPSS rescore
  24. 2026-06-12 23:12 UTCEPSS rescore
  25. 2026-06-12 07:50 UTCGHSA enrichment
  26. 2026-06-11 18:52 UTCGHSA enrichment
  27. 2026-06-11 14:00 UTCEPSS rescore
  28. 2026-06-10 22:18 UTCEPSS rescore
  29. 2026-06-10 13:22 UTCEPSS rescore
  30. 2026-06-10 13:22 UTCEPSS rescore
  31. 2026-06-10 13:14 UTCGHSA enrichment
  32. 2026-06-10 00:18 UTCGHSA enrichment
  33. 2026-06-09 10:01 UTCGHSA enrichment
  34. 2026-06-08 14:17 UTCEPSS rescore
  35. 2026-06-08 14:17 UTCEPSS rescore
  36. 2026-06-08 06:52 UTCGHSA enrichment
  37. 2026-06-07 17:57 UTCGHSA enrichment
  38. 2026-06-07 15:25 UTCEPSS rescore
  39. 2026-06-07 15:25 UTCEPSS rescore
  40. 2026-06-07 05:01 UTCGHSA enrichment
  41. 2026-06-06 13:47 UTCEPSS rescore
  42. 2026-06-06 13:47 UTCEPSS rescore
  43. 2026-06-06 07:08 UTCGHSA enrichment
  44. 2026-06-05 22:47 UTCEPSS rescore
  45. 2026-06-05 12:13 UTCGHSA enrichment
  46. 2026-06-05 06:10 UTCEPSS rescore
  47. 2026-06-05 06:10 UTCEPSS rescore
  48. 2026-06-04 20:54 UTCGHSA enrichment
  49. 2026-06-04 13:12 UTCEPSS rescore
  50. 2026-06-04 13:12 UTCEPSS rescore
  51. 2026-06-03 18:02 UTCGHSA enrichment
  52. 2026-06-02 20:13 UTCEPSS rescore
  53. 2026-06-02 14:01 UTCGHSA enrichment
  54. 2026-06-01 17:55 UTCGHSA enrichment
  55. 2026-06-01 13:52 UTCEPSS rescore
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  58. 2026-05-31 22:30 UTCEPSS rescore
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  63. 2026-05-29 13:44 UTCEPSS rescore
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  72. 2026-05-26 07:18 UTCEPSS rescore
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  74. 2026-05-20 22:38 UTCEPSS rescore
  75. 2026-05-20 22:38 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-40246?
CVE-2026-40246 is a high vulnerability published on April 16, 2026. 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…
When was CVE-2026-40246 disclosed?
CVE-2026-40246 was first published in the National Vulnerability Database on April 16, 2026, with the most recent update on April 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-40246 actively exploited?
CVE-2026-40246 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 30.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-40246?
CVE-2026-40246 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-40246?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-40246, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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