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
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.4Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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
5.4MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100

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%
EPSS PROB
0.3%
EPSS %ILE
15th
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
githubMentions a patch (unverified)

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 rangeFix by version rangeDependents
n8n2.14.0
  • every version up to 1.123.27: fixed in 1.123.27
  • 2.14.0 up to 2.14.1: fixed in 2.14.1
  • 2.0.0-rc.0 up to 2.13.3: fixed in 2.13.3
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 33× 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 189 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. 2026-09-30 15:03 UTCEPSS rescore
  12. 2026-09-29 15:22 UTCEPSS rescore
  13. 2026-09-28 13:51 UTCEPSS rescore
  14. 2026-09-27 13:48 UTCEPSS rescore
  15. 2026-09-26 15:59 UTCEPSS rescore
  16. 2026-09-24 14:04 UTCEPSS rescore
  17. 2026-09-23 17:54 UTCEPSS rescore
  18. 2026-09-23 06:59 UTCEG score recompute
  19. 2026-09-23 06:59 UTCGHSA enrichment
  20. 2026-09-20 20:16 UTCEPSS rescore
  21. 2026-09-18 19:28 UTCEPSS rescore
  22. 2026-09-18 06:38 UTCEG score recompute
  23. 2026-09-18 06:38 UTCGHSA enrichment
  24. 2026-09-17 19:31 UTCEPSS rescore
  25. 2026-09-16 14:08 UTCEPSS rescore
Show 75 more
  1. 2026-09-16 05:15 UTCEPSS rescore
  2. 2026-09-15 03:11 UTCEPSS rescore
  3. 2026-09-14 00:28 UTCEG score recompute
  4. 2026-09-14 00:28 UTCGHSA enrichment
  5. 2026-09-13 16:47 UTCEPSS rescore
  6. 2026-09-12 14:53 UTCEG score recompute
  7. 2026-09-12 14:53 UTCGHSA enrichment
  8. 2026-09-11 14:53 UTCEPSS rescore
  9. 2026-09-10 09:35 UTCEPSS rescore
  10. 2026-09-08 22:01 UTCEPSS rescore
  11. 2026-09-07 16:01 UTCEPSS rescore
  12. 2026-09-06 13:47 UTCEPSS rescore
  13. 2026-09-06 04:59 UTCEG score recompute
  14. 2026-09-06 04:59 UTCGHSA enrichment
  15. 2026-09-04 05:07 UTCEPSS rescore
  16. 2026-09-02 14:12 UTCEPSS rescore
  17. 2026-09-01 13:54 UTCEPSS rescore
  18. 2026-09-01 04:40 UTCEPSS rescore
  19. 2026-08-30 19:17 UTCEPSS rescore
  20. 2026-08-30 13:46 UTCEG score recompute
  21. 2026-08-30 13:46 UTCGHSA enrichment
  22. 2026-08-30 01:22 UTCEPSS rescore
  23. 2026-08-28 21:41 UTCEPSS rescore
  24. 2026-08-27 22:31 UTCEG score recompute
  25. 2026-08-27 22:31 UTCGHSA enrichment
  26. 2026-08-27 14:25 UTCEPSS rescore
  27. 2026-08-26 14:46 UTCEPSS rescore
  28. 2026-08-25 13:49 UTCEPSS rescore
  29. 2026-08-24 11:00 UTCEG score recompute
  30. 2026-08-24 11:00 UTCGHSA enrichment
  31. 2026-08-23 07:34 UTCEG score recompute
  32. 2026-08-23 07:34 UTCGHSA enrichment
  33. 2026-08-23 00:19 UTCEPSS rescore
  34. 2026-08-22 07:31 UTCEG score recompute
  35. 2026-08-22 07:31 UTCGHSA enrichment
  36. 2026-08-21 23:49 UTCEPSS rescore
  37. 2026-08-21 04:53 UTCEG score recompute
  38. 2026-08-21 04:53 UTCGHSA enrichment
  39. 2026-08-20 22:55 UTCEPSS rescore
  40. 2026-08-20 04:54 UTCEG score recompute
  41. 2026-08-20 04:54 UTCGHSA enrichment
  42. 2026-08-19 17:04 UTCEPSS rescore
  43. 2026-08-18 23:42 UTCEG score recompute
  44. 2026-08-18 23:42 UTCGHSA enrichment
  45. 2026-08-18 13:48 UTCEPSS rescore
  46. 2026-08-17 23:43 UTCEG score recompute
  47. 2026-08-17 23:42 UTCGHSA enrichment
  48. 2026-08-17 13:47 UTCEPSS rescore
  49. 2026-08-16 19:51 UTCEG score recompute
  50. 2026-08-16 19:51 UTCGHSA enrichment
  51. 2026-08-16 14:56 UTCEPSS rescore
  52. 2026-08-16 02:14 UTCEPSS rescore
  53. 2026-08-15 19:05 UTCEG score recompute
  54. 2026-08-15 19:05 UTCGHSA enrichment
  55. 2026-08-15 01:30 UTCEPSS rescore
  56. 2026-08-14 19:05 UTCEG score recompute
  57. 2026-08-14 19:05 UTCGHSA enrichment
  58. 2026-08-13 22:00 UTCEPSS rescore
  59. 2026-08-13 19:06 UTCGHSA enrichment
  60. 2026-08-12 19:07 UTCEG score recompute
  61. 2026-08-12 19:07 UTCGHSA enrichment
  62. 2026-08-12 13:51 UTCEPSS rescore
  63. 2026-08-11 19:08 UTCEG score recompute
  64. 2026-08-11 19:08 UTCGHSA enrichment
  65. 2026-08-11 00:00 UTCEPSS rescore
  66. 2026-08-10 19:07 UTCGHSA enrichment
  67. 2026-08-09 19:07 UTCEG score recompute
  68. 2026-08-09 19:07 UTCGHSA enrichment
  69. 2026-08-09 13:46 UTCEPSS rescore
  70. 2026-08-08 19:09 UTCEG score recompute
  71. 2026-08-08 19:09 UTCGHSA enrichment
  72. 2026-08-08 16:37 UTCEPSS rescore
  73. 2026-08-07 19:10 UTCEG score recompute
  74. 2026-08-07 19:10 UTCGHSA enrichment
  75. 2026-08-06 19:11 UTCEG score recompute

Related CVEs(same product + 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 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 0.3% probability of exploitation in the next 30 days (15th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-56356?
CVE-2026-56356 has a CVSS base score of 5.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-56356?
A fix for CVE-2026-56356 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-56356 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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

Explore →

Is Your Infrastructure Affected by CVE-2026-56356?

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

Book a Demo →Browse All CVEs