CVE-2026-77082

MEDIUMNVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

Score 4.3 from GitHub Security Advisory published 2026-08-20. NVD baseline CVSS 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 4.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

n8n before 1.123.69, 2.x before 2.33.4, and 2.34.x before 2.34.1 contains a regular expression denial of service (ReDoS) vulnerability in the Filter and Switch nodes, which compile user-supplied regex patterns with new RegExp() and execute them synchronously on the worker thread without complexity validation or execution timeout. A crafted regex pattern can block the worker for an extended period per data item processed, delaying other workflow executions on the same worker.

CVSS v3
4.3
EG Score
4.3MEDIUMmedium confidence
EG Risk
20
EG Risk 20/100CISA 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
Severity43% × 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
0.5%
EPSS %ILE
38th
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

August 20, 2026

Last Modified

September 1, 2026

Advisory Details (2)

Auto-updated Aug 20, 2026
Patch available. Sources: github.
generic

n8n before 1.123.69 ReDoS via Filter and Switch Node | Advisories | VulnCheck

https://www.vulncheck.com/advisories/n8n-before-redos-via-filter-and-switch-node
github Patch Available

ReDoS in Filter and Switch Node Regex Matching Allows Worker Denial of Service · Advisory · n8n-io/n8n · GitHub

https://github.com/n8n-io/n8n/security/advisories/GHSA-q3fv-295f-qfpf

Vendor Advisories for CVE-2026-77082(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 19× in last 7d / 76× 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 129 total refreshes for this CVE.

  1. 2026-10-05 05:03 UTCEG score recompute
  2. 2026-10-05 05:03 UTCGHSA enrichment
  3. 2026-10-04 23:22 UTCEPSS rescore
  4. 2026-10-04 05:33 UTCEG score recompute
  5. 2026-10-04 05:33 UTCGHSA enrichment
  6. 2026-10-03 14:26 UTCEPSS rescore
  7. 2026-10-03 06:40 UTCEG score recompute
  8. 2026-10-03 06:40 UTCGHSA enrichment
  9. 2026-10-02 06:50 UTCEG score recompute
  10. 2026-10-02 06:50 UTCGHSA enrichment
  11. 2026-10-01 19:50 UTCEPSS rescore
  12. 2026-10-01 07:18 UTCEG score recompute
  13. 2026-10-01 07:18 UTCGHSA enrichment
  14. 2026-09-30 08:25 UTCEG score recompute
  15. 2026-09-30 08:24 UTCGHSA enrichment
  16. 2026-09-29 15:24 UTCEPSS rescore
  17. 2026-09-29 02:00 UTCEG score recompute
  18. 2026-09-29 02:00 UTCGHSA enrichment
  19. 2026-09-28 13:52 UTCEPSS rescore
  20. 2026-09-28 02:18 UTCEG score recompute
  21. 2026-09-28 02:18 UTCGHSA enrichment
  22. 2026-09-27 13:48 UTCEPSS rescore
  23. 2026-09-27 03:25 UTCEG score recompute
  24. 2026-09-27 03:25 UTCGHSA enrichment
  25. 2026-09-26 15:59 UTCEPSS rescore
Show 75 more
  1. 2026-09-26 00:28 UTCEPSS rescore
  2. 2026-09-24 19:13 UTCEG score recompute
  3. 2026-09-24 19:13 UTCGHSA enrichment
  4. 2026-09-24 14:04 UTCEPSS rescore
  5. 2026-09-23 20:06 UTCEG score recompute
  6. 2026-09-23 20:06 UTCGHSA enrichment
  7. 2026-09-23 17:54 UTCEPSS rescore
  8. 2026-09-22 19:47 UTCEG score recompute
  9. 2026-09-22 19:47 UTCGHSA enrichment
  10. 2026-09-22 16:01 UTCEPSS rescore
  11. 2026-09-21 21:09 UTCEPSS rescore
  12. 2026-09-21 18:23 UTCEG score recompute
  13. 2026-09-21 18:22 UTCGHSA enrichment
  14. 2026-09-20 20:16 UTCEPSS rescore
  15. 2026-09-20 19:27 UTCGHSA enrichment
  16. 2026-09-19 20:33 UTCEG score recompute
  17. 2026-09-19 20:33 UTCGHSA enrichment
  18. 2026-09-18 21:40 UTCEG score recompute
  19. 2026-09-18 21:40 UTCGHSA enrichment
  20. 2026-09-18 19:28 UTCEPSS rescore
  21. 2026-09-17 21:24 UTCEG score recompute
  22. 2026-09-17 21:24 UTCGHSA enrichment
  23. 2026-09-16 20:03 UTCEG score recompute
  24. 2026-09-16 20:03 UTCGHSA enrichment
  25. 2026-09-16 14:08 UTCEPSS rescore
  26. 2026-09-16 05:15 UTCEPSS rescore
  27. 2026-09-15 19:12 UTCEG score recompute
  28. 2026-09-15 19:12 UTCGHSA enrichment
  29. 2026-09-15 03:12 UTCEPSS rescore
  30. 2026-09-14 20:18 UTCGHSA enrichment
  31. 2026-09-13 21:21 UTCEG score recompute
  32. 2026-09-13 21:21 UTCGHSA enrichment
  33. 2026-09-12 22:27 UTCEG score recompute
  34. 2026-09-12 22:27 UTCGHSA enrichment
  35. 2026-09-12 15:02 UTCEPSS rescore
  36. 2026-09-11 23:30 UTCEG score recompute
  37. 2026-09-11 23:30 UTCGHSA enrichment
  38. 2026-09-11 14:53 UTCEPSS rescore
  39. 2026-09-11 00:19 UTCEG score recompute
  40. 2026-09-11 00:19 UTCGHSA enrichment
  41. 2026-09-10 09:35 UTCEPSS rescore
  42. 2026-09-10 00:58 UTCGHSA enrichment
  43. 2026-09-09 02:05 UTCEG score recompute
  44. 2026-09-09 02:05 UTCGHSA enrichment
  45. 2026-09-08 22:01 UTCEPSS rescore
  46. 2026-09-07 15:43 UTCGHSA enrichment
  47. 2026-09-06 16:49 UTCEG score recompute
  48. 2026-09-06 16:49 UTCGHSA enrichment
  49. 2026-09-06 13:48 UTCEPSS rescore
  50. 2026-09-05 17:55 UTCEG score recompute
  51. 2026-09-05 17:55 UTCGHSA enrichment
  52. 2026-09-04 19:00 UTCEG score recompute
  53. 2026-09-04 19:00 UTCGHSA enrichment
  54. 2026-09-04 05:07 UTCEPSS rescore
  55. 2026-09-03 20:07 UTCGHSA enrichment
  56. 2026-09-02 21:12 UTCEG score recompute▼ 1.00
  57. 2026-09-02 21:12 UTCGHSA enrichment
  58. 2026-09-02 14:12 UTCEPSS rescore
  59. 2026-09-01 20:02 UTCNVD updateCVSS v3 → 4.3
  60. 2026-09-01 19:55 UTCEG score recompute
  61. 2026-09-01 19:55 UTCGHSA enrichment
  62. 2026-09-01 13:54 UTCEPSS rescore
  63. 2026-09-01 04:40 UTCEPSS rescore
  64. 2026-09-01 04:40 UTCEPSS rescore
  65. 2026-08-31 20:25 UTCGHSA enrichment
  66. 2026-08-31 06:29 UTCEG score recompute
  67. 2026-08-31 06:28 UTCGHSA enrichment
  68. 2026-08-30 19:18 UTCEPSS rescore
  69. 2026-08-30 19:17 UTCEPSS rescore
  70. 2026-08-30 07:31 UTCEG score recompute
  71. 2026-08-30 07:31 UTCGHSA enrichment
  72. 2026-08-30 01:22 UTCEPSS rescore
  73. 2026-08-29 08:37 UTCEG score recompute
  74. 2026-08-29 08:37 UTCGHSA enrichment
  75. 2026-08-28 21:42 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-77082?
CVE-2026-77082 is a medium vulnerability published on August 20, 2026. n8n before 1.123.69, 2.x before 2.33.4, and 2.34.x before 2.34.1 contains a regular expression denial of service (ReDoS) vulnerability in the Filter and Switch nodes, which compile user-supplied regex patterns with new RegExp() and execute them synchronously on the worker thread without complexity…
When was CVE-2026-77082 disclosed?
CVE-2026-77082 was first published on August 20, 2026, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-77082 actively exploited?
CVE-2026-77082 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (38th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-77082?
CVE-2026-77082 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-77082?
A fix for CVE-2026-77082 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-77082 are linked in the Vendor Advisories panel on this page.

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