CVE-2026-18678

MEDIUMPre-NVD 5.55.5
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 5.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1% (2nd 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

Also known asEUVD-2026-57425 (ENISA EUVD) · GHSA-26pg-x7g5-9g43 (GitHub Security Advisories) · GO-2026-6010 (OSV.dev)Source: ENISA EUVD

5.5EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 5.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Fixed versions, as the CVE record's CNA (Kong Inc.) states them: "Upgrade to Kong Mesh 2.7.26, 2.9.16, 2.11.14, 2.12.11 or 2.13.7, whichever matches your release line."

When an operator adds an HTTPS control plane profile to kumactl without providing a CA certificate, kumactl disables TLS verification and sends API tokens over the unverified connection.

An attacker on the network path between the operator and the control plane can intercept user or admin API tokens and then act against the control plane as that user.

CVSS
5.5
EG Score
5.5MEDIUMmedium confidence
EG Risk
25
EG Risk 25/100

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)
Severity55% × 45%
Impact severity (EG Severity): CVSS 5.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.1% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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.
EPSS PROB
0.1%
EPSS %ILE
2nd
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 (5.5): severity, escalated by confirmed exploitation. This CVE's 5.5 is its impact severity (EG Severity), not escalated.

EG Severity
5.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source
EG Likelihood
0.1% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-07). 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 every mission impact level.CISA BOD 26-04: 60 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 every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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)60 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 partial (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 12, 2026

Last Modified

October 23, 2026

Advisory Details (3)

Auto-updated Aug 12, 2026
Patch available. Sources: github_pr.
Web page

Kong Mesh changelog - Kong Mesh | Kong Docs

https://developer.konghq.com/mesh/changelog/
GitHub pull request

fix(kuma-cp): use system trust when CA cert is not provided

Fix merged in kumahq/kuma PR #16777 on 2026-05-29 — awaiting tagged release

https://github.com/kumahq/kuma/pull/16777
GitHub advisoryMentions a patch (unverified)

kumactl connects to control plane without verifying TLS certificate when no CA is configured · Advisory · kumahq/kuma · GitHub

https://github.com/kumahq/kuma/security/advisories/GHSA-v95x-xhq5-4929

Vendor Advisories for CVE-2026-18678(1)

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

Affected Packages

(2 across 1 ecosystem)
Go(2)
PackageVulnerable rangeFix by version rangeDependents
github.com/kumahq/kuma—
  • every version on: no fix on record
—
github.com/kumahq/kuma/v2—
  • every version up to 2.7.26: fixed in 2.7.26
  • 2.9.13 up to 2.11.14: fixed in 2.11.14
  • 2.12.4 up to 2.12.11: fixed in 2.12.11
  • 2.13.0 up to 2.13.7: fixed in 2.13.7
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 32× 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 180 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 80 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 16:51 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  2. 2026-11-12 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  3. 2026-11-11 16:38 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  4. 2026-11-10 16:42 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  5. 2026-11-09 16:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  6. 2026-11-08 16:38 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  7. 2026-11-07 19:43 UTCGHSA enrichmentGHSA-26pg-x7g5-9g43 · GitHub severity MODERATE
  8. 2026-11-07 19:43 UTCEchelonGraph re-scored
  9. 2026-11-07 16:38 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  10. 2026-11-06 16:37 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  11. 2026-11-05 16:37 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  12. 2026-11-04 16:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  13. 2026-11-03 16:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  14. 2026-11-02 16:44 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  15. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  16. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  17. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  18. 2026-10-29 16:00 UTCEchelonGraph re-scored
  19. 2026-10-29 16:00 UTCGHSA enrichmentGHSA-26pg-x7g5-9g43
  20. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  21. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  22. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  23. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  24. 2026-10-25 14:45 UTCEchelonGraph re-scored
  25. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
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  1. 2026-10-23 19:34 UTCEchelonGraph re-scored
  2. 2026-10-23 19:34 UTCGHSA enrichmentGHSA-26pg-x7g5-9g43
  3. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  4. 2026-10-23 05:59 UTCEchelonGraph re-scored
  5. 2026-10-23 05:58 UTCGHSA enrichmentGHSA-26pg-x7g5-9g43
  6. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  7. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  8. 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  9. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  10. 2026-10-18 03:58 UTCEchelonGraph re-scored
  11. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  12. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  13. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  14. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  15. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  16. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  17. 2026-10-12 16:27 UTCEchelonGraph re-scored
  18. 2026-10-11 20:07 UTCEchelonGraph re-scored
  19. 2026-10-11 17:20 UTCEchelonGraph re-scored
  20. 2026-10-11 14:52 UTCEchelonGraph re-scored
  21. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  22. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  23. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  24. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  25. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  26. 2026-10-06 17:25 UTCEchelonGraph re-scored
  27. 2026-10-06 17:25 UTCGHSA enrichmentGHSA-26pg-x7g5-9g43
  28. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  29. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  30. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  31. 2026-10-04 22:29 UTCGHSA enrichmentGHSA-26pg-x7g5-9g43
  32. 2026-10-03 19:57 UTCEchelonGraph re-scored
  33. 2026-10-03 19:57 UTCGHSA enrichmentGHSA-26pg-x7g5-9g43
  34. 2026-10-02 08:20 UTCEchelonGraph re-scored
  35. 2026-10-02 08:20 UTCGHSA enrichmentGHSA-26pg-x7g5-9g43
  36. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  37. 2026-09-30 21:54 UTCEchelonGraph re-scored
  38. 2026-09-30 21:54 UTCGHSA enrichmentGHSA-26pg-x7g5-9g43
  39. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  40. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  41. 2026-09-29 07:38 UTCEchelonGraph re-scored
  42. 2026-09-29 07:38 UTCGHSA enrichmentGHSA-26pg-x7g5-9g43
  43. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  44. 2026-09-28 08:46 UTCEchelonGraph re-scored
  45. 2026-09-28 08:46 UTCGHSA enrichmentGHSA-26pg-x7g5-9g43
  46. 2026-09-27 13:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  47. 2026-09-27 09:53 UTCEchelonGraph re-scored
  48. 2026-09-27 09:53 UTCGHSA enrichmentGHSA-26pg-x7g5-9g43
  49. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  50. 2026-09-25 03:41 UTCEchelonGraph re-scored
  51. 2026-09-25 03:41 UTCGHSA enrichmentGHSA-26pg-x7g5-9g43
  52. 2026-09-23 20:54 UTCEchelonGraph re-scored
  53. 2026-09-23 20:54 UTCGHSA enrichmentGHSA-26pg-x7g5-9g43
  54. 2026-09-22 21:05 UTCEchelonGraph re-scored
  55. 2026-09-22 21:05 UTCGHSA enrichmentGHSA-26pg-x7g5-9g43
  56. 2026-09-21 20:57 UTCGHSA enrichmentGHSA-26pg-x7g5-9g43
  57. 2026-09-20 22:04 UTCEchelonGraph re-scored
  58. 2026-09-20 22:04 UTCGHSA enrichmentGHSA-26pg-x7g5-9g43
  59. 2026-09-19 23:11 UTCEchelonGraph re-scored
  60. 2026-09-19 23:11 UTCGHSA enrichmentGHSA-26pg-x7g5-9g43
  61. 2026-09-18 23:24 UTCEchelonGraph re-scored
  62. 2026-09-18 23:24 UTCGHSA enrichmentGHSA-26pg-x7g5-9g43
  63. 2026-09-18 19:27 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  64. 2026-09-18 00:32 UTCEchelonGraph re-scored
  65. 2026-09-18 00:32 UTCGHSA enrichmentGHSA-26pg-x7g5-9g43
  66. 2026-09-17 00:20 UTCEchelonGraph re-scored
  67. 2026-09-17 00:20 UTCGHSA enrichmentGHSA-26pg-x7g5-9g43
  68. 2026-09-16 14:07 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  69. 2026-09-16 05:14 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  70. 2026-09-15 21:59 UTCEchelonGraph re-scored
  71. 2026-09-15 21:58 UTCGHSA enrichmentGHSA-26pg-x7g5-9g43
  72. 2026-09-14 22:42 UTCGHSA enrichmentGHSA-26pg-x7g5-9g43
  73. 2026-09-13 23:50 UTCGHSA enrichmentGHSA-26pg-x7g5-9g43
  74. 2026-09-13 00:58 UTCEchelonGraph re-scored
  75. 2026-09-13 00:58 UTCGHSA enrichmentGHSA-26pg-x7g5-9g43

Frequently asked(5)

What is CVE-2026-18678?
CVE-2026-18678 is a medium-severity vulnerability; its CVE record was published on August 12, 2026. When an operator adds an HTTPS control plane profile to kumactl without providing a CA certificate, kumactl disables TLS verification and sends API tokens over the unverified connection. An attacker on the network path between the operator and the control plane can intercept user or admin API…
When was the CVE record for CVE-2026-18678 published?
The CVE record for CVE-2026-18678 was published on August 12, 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 October 23, 2026; the record at its source may have been updated since.
Is CVE-2026-18678 actively exploited?
CVE-2026-18678 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (2nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-18678?
CVE-2026-18678 has a CVSS base score of 5.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-18678?
A fix for CVE-2026-18678 is available: update to the fixed version the vendor names in its advisory. Fixed versions, as the CVE record's CNA (Kong Inc.) states them: "Upgrade to Kong Mesh 2.7.26, 2.9.16, 2.11.14, 2.12.11 or 2.13.7, whichever matches your release line." The vendor advisories EchelonGraph has for CVE-2026-18678 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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