CVE-2026-55068

CRITICALPre-NVD 9.39.3
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This critical-severity CVE scores 9.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6% (48th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Elevated

Also known asEUVD-2026-67835 (ENISA EUVD) · GHSA-x8mj-6p3q-g5pp (GitHub Security Advisories) · GO-2026-6316 (OSV.dev)Source: ENISA EUVD

9.3EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 9.3Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

free5GC is an open-source implementation of the 5G core network. In 4.2.2 and earlier, the NRF RegisterNFInstance handler at PUT /nnrf-nfm/v1/nf-instances/{nfInstanceID} accepts NF Profiles without enforcing UUID format, nfStatus enum values, heartBeatTimer ranges, mandatory profile fields, or nfServices.ipEndPoints address constraints. The invalid profiles are persisted in the MongoDB NfProfile collection and returned by NFDiscover, allowing an attacker with SBI access to advertise attacker-controlled network-function endpoints and redirect control-plane signaling. This can expose credentials and signaling, alter service discovery integrity, and deny service across network functions that trust the NRF. This issue is fixed in version 4.2.3.

CVSS
9.3
EG Score
9.3CRITICALmedium confidence
EG Risk
58
EG Risk 58/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity93% × 45%
Impact severity (EG Severity): CVSS 9.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.6%
EPSS %ILE
48th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.3): severity, escalated by confirmed exploitation. This CVE's 9.3 is its impact severity (EG Severity), not escalated.

EG Severity
9.3 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source
EG Likelihood
0.6% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-12). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track* at medium mission impactTrack at low, Track* at medium and Attend at high mission impact.CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track* at medium and Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 28, 2026

Last Modified

September 8, 2026

Advisory Details (7)

Auto-updated Oct 3, 2026
Patch available. Sources: github, github_commit, github_pr, github_release.
GitHub advisoryMentions a patch (unverified)

NRF nnrf-nfm lacks NF Profile input validation — enables NF Registration Poisoning with arbitrary service endpoints · Advisory · free5gc/free5gc · GitHub

https://github.com/free5gc/free5gc/security/advisories/GHSA-x8mj-6p3q-g5pp
GitHub release Patch Available

v1.4.5

Patch available: free5gc/nrf v1.4.5

https://github.com/free5gc/nrf/releases/tag/v1.4.5
GitHub pull request Patch Available

fix: add concrete validation for nfProfile create and patch

Patch available: free5gc/nrf v1.4.5 (PR #90 merged 2026-06-10)

https://github.com/free5gc/nrf/pull/90
GitHub commit Patch Available

commit fcd3cfaa27cc (free5gc/nrf)

Patch available: free5gc/nrf v1.4.5 (contains commit fcd3cfaa27cc)

https://github.com/free5gc/nrf/commit/fcd3cfaa27cc4dc17172ee0c4c3e0a3a696297c6
GitHub commit Patch Available

commit bda0cf75be55 (free5gc/nrf)

Patch available: free5gc/nrf v1.4.5 (contains commit bda0cf75be55)

https://github.com/free5gc/nrf/commit/bda0cf75be5556bb4c758c8b34710f3fe6bbe3ea
GitHub release Patch Available

v4.2.3

Patch available: free5gc/free5gc v4.2.3

https://github.com/free5gc/free5gc/releases/tag/v4.2.3
Web page

[Bugs]NRF nnrf-nfm lacks NF Profile input validation — enables NF Registration Poisoning with arbitrary service endpoints · Issue #1056 · free5gc/free5gc · GitHub

https://github.com/free5gc/free5gc/issues/1056

Vendor Advisories for CVE-2026-55068(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
gogithub.com/free5gc/free5gc @ 4.2.2 (fixes < 4.2.2)—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 rangeFix by version rangeDependents
github.com/free5gc/free5gc—
  • every version up to 4.2.2: fixed in 4.2.2
  • every version up to 4.2.2+incompatible: fixed in 4.2.2+incompatible
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 42× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 161 rows on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 61 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-12 16:38 UTCEchelonGraph re-scored
  2. 2026-11-12 16:38 UTCGHSA enrichmentGHSA-x8mj-6p3q-g5pp · GitHub severity CRITICAL
  3. 2026-11-12 16:34 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  4. 2026-11-11 16:40 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  5. 2026-11-11 14:31 UTCEchelonGraph re-scored
  6. 2026-11-11 14:31 UTCGHSA enrichmentGHSA-x8mj-6p3q-g5pp · GitHub severity CRITICAL
  7. 2026-11-10 16:44 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  8. 2026-11-10 12:24 UTCEchelonGraph re-scored
  9. 2026-11-10 12:24 UTCGHSA enrichmentGHSA-x8mj-6p3q-g5pp · GitHub severity CRITICAL
  10. 2026-11-09 16:35 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  11. 2026-11-09 10:17 UTCEchelonGraph re-scored
  12. 2026-11-09 10:17 UTCGHSA enrichmentGHSA-x8mj-6p3q-g5pp · GitHub severity CRITICAL
  13. 2026-11-08 16:40 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  14. 2026-11-08 08:09 UTCEchelonGraph re-scored
  15. 2026-11-08 08:09 UTCGHSA enrichmentGHSA-x8mj-6p3q-g5pp · GitHub severity CRITICAL
  16. 2026-11-07 16:39 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  17. 2026-11-07 06:02 UTCEchelonGraph re-scored
  18. 2026-11-07 06:02 UTCGHSA enrichmentGHSA-x8mj-6p3q-g5pp · GitHub severity CRITICAL
  19. 2026-11-06 16:38 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  20. 2026-11-06 12:25 UTCOSV refresh
  21. 2026-11-06 03:55 UTCEchelonGraph re-scored
  22. 2026-11-06 03:55 UTCGHSA enrichmentGHSA-x8mj-6p3q-g5pp · GitHub severity CRITICAL
  23. 2026-11-05 16:38 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  24. 2026-11-05 01:49 UTCEchelonGraph re-scored
  25. 2026-11-05 01:49 UTCGHSA enrichmentGHSA-x8mj-6p3q-g5pp · GitHub severity CRITICAL
Show 75 more
  1. 2026-11-04 16:35 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  2. 2026-11-03 23:42 UTCEchelonGraph re-scored
  3. 2026-11-03 23:42 UTCGHSA enrichmentGHSA-x8mj-6p3q-g5pp · GitHub severity CRITICAL
  4. 2026-11-03 16:48 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  5. 2026-11-02 21:36 UTCEchelonGraph re-scored
  6. 2026-11-02 21:36 UTCGHSA enrichmentGHSA-x8mj-6p3q-g5pp · GitHub severity CRITICAL
  7. 2026-11-02 16:45 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  8. 2026-11-01 19:29 UTCEchelonGraph re-scored
  9. 2026-11-01 19:29 UTCGHSA enrichmentGHSA-x8mj-6p3q-g5pp · GitHub severity CRITICAL
  10. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  11. 2026-11-01 07:44 UTCGHSA enrichmentGHSA-x8mj-6p3q-g5pp · GitHub severity CRITICAL
  12. 2026-10-31 17:23 UTCEchelonGraph re-scored
  13. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  14. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  15. 2026-10-30 15:15 UTCEchelonGraph re-scored
  16. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  17. 2026-10-29 13:09 UTCEchelonGraph re-scored
  18. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  19. 2026-10-28 10:59 UTCEchelonGraph re-scored
  20. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  21. 2026-10-27 08:02 UTCEchelonGraph re-scored
  22. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  23. 2026-10-26 03:35 UTCEchelonGraph re-scored
  24. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  25. 2026-10-25 14:19 UTCEchelonGraph re-scored
  26. 2026-10-25 01:27 UTCEchelonGraph re-scored
  27. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  28. 2026-10-23 23:20 UTCEchelonGraph re-scored
  29. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  30. 2026-10-22 21:10 UTCEchelonGraph re-scored
  31. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  32. 2026-10-21 19:04 UTCEchelonGraph re-scored
  33. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  34. 2026-10-20 16:55 UTCEchelonGraph re-scored
  35. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  36. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  37. 2026-10-19 14:47 UTCEchelonGraph re-scored
  38. 2026-10-18 03:30 UTCEchelonGraph re-scored
  39. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  40. 2026-10-17 10:32 UTCEchelonGraph re-scored
  41. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  42. 2026-10-16 08:25 UTCEchelonGraph re-scored
  43. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  44. 2026-10-15 06:17 UTCEchelonGraph re-scored
  45. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  46. 2026-10-14 01:56 UTCEchelonGraph re-scored
  47. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  48. 2026-10-12 22:14 UTCEchelonGraph re-scored
  49. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  50. 2026-10-12 15:56 UTCEchelonGraph re-scored
  51. 2026-10-11 19:39 UTCEchelonGraph re-scored
  52. 2026-10-11 16:54 UTCEchelonGraph re-scored
  53. 2026-10-11 14:17 UTCEchelonGraph re-scored
  54. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  55. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  56. 2026-10-10 00:51 UTCEchelonGraph re-scored
  57. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  58. 2026-10-09 02:39 UTCEchelonGraph re-scored
  59. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  60. 2026-10-08 00:51 UTCEchelonGraph re-scored
  61. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  62. 2026-10-06 18:42 UTCEchelonGraph re-scored
  63. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  64. 2026-10-05 20:34 UTCEchelonGraph re-scored
  65. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  66. 2026-10-05 01:20 UTCEchelonGraph re-scored
  67. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  68. 2026-10-03 17:23 UTCEchelonGraph re-scored
  69. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  70. 2026-10-02 21:35 UTCEchelonGraph re-scored
  71. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  72. 2026-10-02 00:37 UTCEchelonGraph re-scored
  73. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  74. 2026-09-30 19:49 UTCEchelonGraph re-scored
  75. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.6% · 46th percentile

Frequently asked(5)

What is CVE-2026-55068?
CVE-2026-55068 is a critical-severity vulnerability; its CVE record was published on August 28, 2026. free5GC is an open-source implementation of the 5G core network. In 4.2.2 and earlier, the NRF RegisterNFInstance handler at PUT /nnrf-nfm/v1/nf-instances/{nfInstanceID} accepts NF Profiles without enforcing UUID format, nfStatus enum values, heartBeatTimer ranges, mandatory profile fields, or…
When was the CVE record for CVE-2026-55068 published?
The CVE record for CVE-2026-55068 was published on August 28, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 8, 2026; the record at its source may have been updated since.
Is CVE-2026-55068 actively exploited?
CVE-2026-55068 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (48th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-55068?
CVE-2026-55068 has a CVSS base score of 9.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-55068?
A fix for CVE-2026-55068 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-55068 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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