CVE-2026-82180

CRITICALPre-NVD 9.59.5—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 87% of all CVEs by exploit prediction. 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
9.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.5Exploit: None knownExposed: 0

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

In Eclipse Arrowhead versions from 5.0.0 to 5.2.1 when the MQTT API is enabled with the certificate authentication policy, CertificateMqttFilter parses an X.509 certificate that the client sends inside the MQTT message payload (the authentication field of MqttRequestTemplate) and treats its Subject DN as the authenticated identity. The certificate is decoded with CertificateFactory.generateCertificate() but its signature is never verified and its issuer chain is never validated against any trust store. Authorisation is reduced to two string comparisons on attacker-supplied data: the DN-qualifier must equal "sy" or "op", and the cloud-name part of the CN must match the server's. Both values are public (the cloud name is in the server's own TLS certificate). An attacker who can publish to the MQTT broker can therefore mint a self-signed certificate with CN=Sysop...arrowhead.eu, dnQualifier=op, send it as the authentication field, and be authenticated as the cloud's system operator with isSysOp == true. This passes the downstream ManagementServiceMqttFilter (request.isSysOp() → allowed) and gives full management access over MQTT. The HTTP CertificateFilter is not affected — it reads the certificate from jakarta.servlet.request.X509Certificate, which Tomcat populates only after a successful mTLS handshake against the configured trust store.

CVSS v3
9.5
EG Score
9.5(medium)
EG Risk
43(Track)
EG Risk 43/100SSVC: Track

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
Severity95% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
13%
KEV
Not listed

Published

September 3, 2026

Last Modified

September 3, 2026

Advisory Details (1)

Auto-updated Sep 14, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

[Eclipse Arrowhead] `CertificateMqttFilter` accepts unverified certificates from the MQTT message body — full sysop authentication bypass (#812) · Issues · Eclipse Projects Security / vulnerability-reports · GitLab

https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/812

Vendor Advisories for CVE-2026-82180(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 55× in last 7d / 130× 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 130 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-82180?
CVE-2026-82180 is a critical vulnerability published on September 3, 2026. In Eclipse Arrowhead versions from 5.0.0 to 5.2.1 when the MQTT API is enabled with the certificate authentication policy, CertificateMqttFilter parses an X.509 certificate that the client sends inside the MQTT message payload (the authentication field of MqttRequestTemplate) and treats its Subject…
When was CVE-2026-82180 disclosed?
CVE-2026-82180 was first published in the National Vulnerability Database on September 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-82180 actively exploited?
CVE-2026-82180 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 86.9% of all scored CVEs.
What is the CVSS score of CVE-2026-82180?
CVE-2026-82180 has a CVSS v3 base score of 9.5 (NVD).
How do I remediate CVE-2026-82180?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-82180, 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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