CVE-2026-18673

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (37th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 5.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

When kuma-dp is configured with the Envoy admin API on a Unix domain socket, which is the default, its readiness service on TCP port 9902 - bound to all interfaces - forwards almost the entire Envoy admin API to any caller that can reach the port, with no authentication.

An attacker with network access to a data plane's port 9902, for example another pod on the cluster network, can read Envoy and data plane configuration without credentials: config dumps, cluster and listener lists, stats, and the mesh trust bundle. Exposure is read-only - destructive Envoy admin actions are blocked and private keys are not exposed.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
24
EG Risk 24/100CISA SSVC

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
Severity53% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
37th
KEV
Not listed

CISA SSVCTrack 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). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 12, 2026

Last Modified

August 31, 2026

Advisory Details (4)

Auto-updated Aug 12, 2026
Patch available. Sources: github_pr, github.
generic

Kong Mesh changelog - Kong Mesh | Kong Docs

https://developer.konghq.com/mesh/changelog/
github_pr Patch Available

fix(kuma-dp): restrict readiness reporter to /ready (backport of #17317)

Patch available: kumahq/kuma v2.14.2 (PR #17418 merged 2026-07-16)

https://github.com/kumahq/kuma/pull/17418
github_pr

fix(kuma-dp): restrict readiness reporter to /ready

Fix merged in kumahq/kuma PR #17317 on 2026-07-15 — awaiting tagged release

https://github.com/kumahq/kuma/pull/17317
github Patch Available

kuma-dp readiness service exposes the Envoy admin API without authentication · Advisory · kumahq/kuma · GitHub

https://github.com/kumahq/kuma/security/advisories/GHSA-r9pv-x3pm-4r2w

Vendor Advisories for CVE-2026-18673(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 64× 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 134 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-18673?
CVE-2026-18673 is a medium vulnerability published on August 12, 2026. When kuma-dp is configured with the Envoy admin API on a Unix domain socket, which is the default, its readiness service on TCP port 9902 - bound to all interfaces - forwards almost the entire Envoy admin API to any caller that can reach the port, with no authentication. An attacker with network…
When was CVE-2026-18673 disclosed?
CVE-2026-18673 was first published on August 12, 2026, with the most recent update on August 31, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18673 actively exploited?
CVE-2026-18673 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (37th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-18673?
CVE-2026-18673 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-18673?
A fix for CVE-2026-18673 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-18673 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-18673

Explore →

Is Your Infrastructure Affected by CVE-2026-18673?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs