CVE-2026-56356

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

Score 5.4 from GitHub Security Advisory published 2026-07-01. a secondary CVSS source baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.4Exploit: None knownExposed: 0

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

n8n contains a stored cross-site scripting vulnerability in the Chat Trigger node's Custom CSS field due to a misconfiguration of the sanitize-html library. Affected releases are those before 1.123.27, the 2.0.0 through 2.13.2 line, and 2.14.0 (fixed in 1.123.27, 2.13.3, and 2.14.1). An authenticated user with permission to create or modify workflows can inject JavaScript that bypasses sanitization, resulting in stored XSS against any user who visits the public chat page.

CVSS v3
5.4
EG Score
5.4(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity54% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
17%
KEV
Not listed

Published

July 1, 2026

Last Modified

July 2, 2026

Advisory Details (2)

Auto-updated Jul 3, 2026
Patch available. Sources: github.
generic

n8n - Stored Cross-Site Scripting in Chat Trigger Node Custom CSS Field | Advisories | VulnCheck

https://www.vulncheck.com/advisories/n8n-stored-cross-site-scripting-in-chat-trigger-node-custom-css-field
github Patch Available

XSS in Chat Trigger Node via Custom CSS · Advisory · n8n-io/n8n · GitHub

https://github.com/n8n-io/n8n/security/advisories/GHSA-3c7f-5hgj-h279

Vendor Advisories for CVE-2026-56356(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 rangeFixed inDependents
n8n2.14.02.13.3—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 44× 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 169 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-56356?
CVE-2026-56356 is a medium vulnerability published on July 1, 2026. n8n contains a stored cross-site scripting vulnerability in the Chat Trigger node's Custom CSS field due to a misconfiguration of the sanitize-html library. Affected releases are those before 1.123.27, the 2.0.0 through 2.13.2 line, and 2.14.0 (fixed in 1.123.27, 2.13.3, and 2.14.1). An…
When was CVE-2026-56356 disclosed?
CVE-2026-56356 was first published in the National Vulnerability Database on July 1, 2026, with the most recent update on July 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56356 actively exploited?
CVE-2026-56356 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 83.3% of all scored CVEs.
What is the CVSS score of CVE-2026-56356?
CVE-2026-56356 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-56356?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56356, 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.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-56356

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