CVE-2026-56360

MEDIUMPre-NVD 4.04.0—
EchelonGraph scoreMEDIUM confidence

Score 4.0 from GitHub Security Advisory published 2026-07-08. A secondary CVSS source baseline 4.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
4.0EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 4.0Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

n8n before versions 1.123.18 and 2.6.2 fails to verify HMAC-SHA256 signatures on Zendesk webhooks in the ZendeskTrigger node. Attackers who know the webhook URL can send unsigned POST requests to trigger workflows with arbitrary malicious data.

CVSS v3
4.0
EG Score
4.0MEDIUMmedium confidence
EG Risk
18
EG Risk 18/100CISA 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
Severity40% × 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
0.3%
EPSS %ILE
22nd
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

July 8, 2026

Last Modified

July 8, 2026

Advisory Details (2)

Auto-updated Jul 8, 2026
Patch available. Sources: github.
generic

n8n - Webhook Forgery via Unsigned POST Requests in ZendeskTrigger | Advisories | VulnCheck

https://www.vulncheck.com/advisories/n8n-webhook-forgery-via-unsigned-post-requests-in-zendesktrigger
githubMentions a patch (unverified)

Webhook Forgery on Zendesk Trigger · Advisory · n8n-io/n8n · GitHub

https://github.com/n8n-io/n8n/security/advisories/GHSA-38c7-23hj-2wgq

Vendor Advisories for CVE-2026-56360(1)

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

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFix by version rangeDependents
n8n—
  • every version up to 1.123.18: fixed in 1.123.18
  • 2.0.0 up to 2.6.2: fixed in 2.6.2
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 41× 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 178 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-56360?
CVE-2026-56360 is a medium vulnerability published on July 8, 2026. n8n before versions 1.123.18 and 2.6.2 fails to verify HMAC-SHA256 signatures on Zendesk webhooks in the ZendeskTrigger node. Attackers who know the webhook URL can send unsigned POST requests to trigger workflows with arbitrary malicious data.
When was CVE-2026-56360 disclosed?
CVE-2026-56360 was first published on July 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56360 actively exploited?
CVE-2026-56360 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (22nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-56360?
CVE-2026-56360 has a CVSS base score of 4.0 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-56360?
A fix for CVE-2026-56360 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-56360 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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