CVE-2026-56777

MEDIUMPre-NVD 5.05.0—
EchelonGraph scoreMEDIUM confidence

Score 5.0 from GitHub Security Advisory published 2026-07-01. a secondary CVSS source baseline 5.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
5.0EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.0Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

n8n before 2.25.7 and 2.26.x before 2.26.2 contains an abstract syntax tree (AST) security validator bypass in the Python Code node. An authenticated user with permission to create or modify workflows containing a Python Code node can bypass the validator and access the task executor module namespace. The issue only affects self-hosted instances where the Python Task Runner is enabled; where N8N_BLOCK_RUNNER_ENV_ACCESS is configured to allow it, this can disclose environment variables accessible to the task runner process.

CVSS v3
5.0
EG Score
5.0MEDIUMmedium confidence
EG Risk
27
EG Risk 27/100

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
Severity50% × 45%
Exploitation0% × 40%
Automatability30% × 15%
EPSS PROB
0.3%
EPSS %ILE
23rd
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 - AST Validator Bypass in Python Code Node | Advisories | VulnCheck

https://www.vulncheck.com/advisories/n8n-ast-validator-bypass-in-python-code-node
githubMentions a patch (unverified)

Python Code Node AST Validator Bypass · Advisory · n8n-io/n8n · GitHub

https://github.com/n8n-io/n8n/security/advisories/GHSA-jwm3-qcfw-c5pp

Vendor Advisories for CVE-2026-56777(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—
  • 2.26.0 up to 2.26.2: fixed in 2.26.2
  • every version up to 2.25.7: fixed in 2.25.7
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 32× 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 197 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 06:59 UTCEG score recompute
  18. 2026-09-23 06:59 UTCGHSA enrichment
  19. 2026-09-20 20:16 UTCEPSS rescore
  20. 2026-09-18 19:28 UTCEPSS rescore
  21. 2026-09-18 06:38 UTCEG score recompute
  22. 2026-09-18 06:38 UTCGHSA enrichment
  23. 2026-09-17 19:31 UTCEPSS rescore
  24. 2026-09-16 14:08 UTCEPSS rescore
  25. 2026-09-16 05:15 UTCEPSS rescore
Show 75 more
  1. 2026-09-15 03:11 UTCEPSS rescore
  2. 2026-09-13 16:47 UTCEPSS rescore
  3. 2026-09-13 13:49 UTCEG score recompute
  4. 2026-09-13 13:49 UTCGHSA enrichment
  5. 2026-09-12 14:52 UTCEG score recompute
  6. 2026-09-12 14:52 UTCGHSA enrichment
  7. 2026-09-11 14:53 UTCEPSS rescore
  8. 2026-09-10 09:35 UTCEPSS rescore
  9. 2026-09-08 22:01 UTCEPSS rescore
  10. 2026-09-07 16:01 UTCEPSS rescore
  11. 2026-09-06 13:47 UTCEPSS rescore
  12. 2026-09-06 04:58 UTCEG score recompute
  13. 2026-09-06 04:58 UTCGHSA enrichment
  14. 2026-09-04 05:07 UTCEPSS rescore
  15. 2026-09-02 14:12 UTCEPSS rescore
  16. 2026-09-01 13:54 UTCEPSS rescore
  17. 2026-09-01 04:40 UTCEPSS rescore
  18. 2026-08-30 19:17 UTCEPSS rescore
  19. 2026-08-30 13:44 UTCEG score recompute
  20. 2026-08-30 13:44 UTCGHSA enrichment
  21. 2026-08-30 01:22 UTCEPSS rescore
  22. 2026-08-28 21:42 UTCEPSS rescore
  23. 2026-08-27 22:30 UTCEG score recompute
  24. 2026-08-27 22:30 UTCGHSA enrichment
  25. 2026-08-27 14:25 UTCEPSS rescore
  26. 2026-08-26 14:46 UTCEPSS rescore
  27. 2026-08-25 13:49 UTCEPSS rescore
  28. 2026-08-25 04:23 UTCEG score recompute
  29. 2026-08-25 04:22 UTCGHSA enrichment
  30. 2026-08-24 05:25 UTCGHSA enrichment
  31. 2026-08-23 06:28 UTCEG score recompute
  32. 2026-08-23 06:28 UTCGHSA enrichment
  33. 2026-08-23 00:19 UTCEPSS rescore
  34. 2026-08-22 07:30 UTCEG score recompute
  35. 2026-08-22 07:30 UTCGHSA enrichment
  36. 2026-08-21 23:49 UTCEPSS rescore
  37. 2026-08-21 04:41 UTCEG score recompute
  38. 2026-08-21 04:41 UTCGHSA enrichment
  39. 2026-08-20 22:55 UTCEPSS rescore
  40. 2026-08-20 04:53 UTCEG score recompute
  41. 2026-08-20 04:53 UTCGHSA enrichment
  42. 2026-08-19 17:04 UTCEPSS rescore
  43. 2026-08-18 22:54 UTCEG score recompute
  44. 2026-08-18 22:54 UTCGHSA enrichment
  45. 2026-08-18 13:48 UTCEPSS rescore
  46. 2026-08-17 23:40 UTCEG score recompute
  47. 2026-08-17 23:40 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 20:03 UTCEG score recompute
  54. 2026-08-15 20:03 UTCGHSA enrichment
  55. 2026-08-15 01:30 UTCEPSS rescore
  56. 2026-08-14 21:04 UTCGHSA enrichment
  57. 2026-08-13 22:07 UTCEG score recompute
  58. 2026-08-13 22:07 UTCGHSA enrichment
  59. 2026-08-13 22:00 UTCEPSS rescore
  60. 2026-08-12 23:11 UTCEG score recompute
  61. 2026-08-12 23:11 UTCGHSA enrichment
  62. 2026-08-12 13:51 UTCEPSS rescore
  63. 2026-08-12 00:14 UTCEG score recompute
  64. 2026-08-12 00:14 UTCGHSA enrichment
  65. 2026-08-11 01:17 UTCEG score recompute
  66. 2026-08-11 01:17 UTCGHSA enrichment
  67. 2026-08-11 00:00 UTCEPSS rescore
  68. 2026-08-10 02:21 UTCEG score recompute
  69. 2026-08-10 02:21 UTCGHSA enrichment
  70. 2026-08-09 13:46 UTCEPSS rescore
  71. 2026-08-09 03:24 UTCEG score recompute
  72. 2026-08-09 03:24 UTCGHSA enrichment
  73. 2026-08-08 16:37 UTCEPSS rescore
  74. 2026-08-08 04:28 UTCEG score recompute
  75. 2026-08-08 04:28 UTCGHSA enrichment

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-56777?
CVE-2026-56777 is a medium vulnerability published on July 1, 2026. n8n before 2.25.7 and 2.26.x before 2.26.2 contains an abstract syntax tree (AST) security validator bypass in the Python Code node. An authenticated user with permission to create or modify workflows containing a Python Code node can bypass the validator and access the task executor module…
When was CVE-2026-56777 disclosed?
CVE-2026-56777 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-2026-56777 actively exploited?
CVE-2026-56777 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (23rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-56777?
CVE-2026-56777 has a CVSS base score of 5.0 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-56777?
A fix for CVE-2026-56777 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-56777 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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