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%CVSS: 4.3Exploit: None knownExposed: 0

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

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
4.3(medium)
EG Risk
19(Track)
EG Risk 19/100SSVC: 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
Severity43% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

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 / 86× 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.

  1. 2026-09-19 20:33 UTCEG score recompute
  2. 2026-09-19 20:33 UTCGHSA enrichment
  3. 2026-09-18 21:40 UTCEG score recompute
  4. 2026-09-18 21:40 UTCGHSA enrichment
  5. 2026-09-18 19:28 UTCEPSS rescore
  6. 2026-09-17 21:24 UTCEG score recompute
  7. 2026-09-17 21:24 UTCGHSA enrichment
  8. 2026-09-16 20:03 UTCEG score recompute
  9. 2026-09-16 20:03 UTCGHSA enrichment
  10. 2026-09-16 14:08 UTCEPSS rescore
  11. 2026-09-16 05:15 UTCEPSS rescore
  12. 2026-09-15 19:12 UTCEG score recompute
  13. 2026-09-15 19:12 UTCGHSA enrichment
  14. 2026-09-15 03:12 UTCEPSS rescore
  15. 2026-09-14 20:18 UTCGHSA enrichment
  16. 2026-09-13 21:21 UTCEG score recompute
  17. 2026-09-13 21:21 UTCGHSA enrichment
  18. 2026-09-12 22:27 UTCEG score recompute
  19. 2026-09-12 22:27 UTCGHSA enrichment
  20. 2026-09-12 15:02 UTCEPSS rescore
  21. 2026-09-11 23:30 UTCEG score recompute
  22. 2026-09-11 23:30 UTCGHSA enrichment
  23. 2026-09-11 14:53 UTCEPSS rescore
  24. 2026-09-11 00:19 UTCEG score recompute
  25. 2026-09-11 00:19 UTCGHSA enrichment
Show 64 more
  1. 2026-09-10 09:35 UTCEPSS rescore
  2. 2026-09-10 00:58 UTCGHSA enrichment
  3. 2026-09-09 02:05 UTCEG score recompute
  4. 2026-09-09 02:05 UTCGHSA enrichment
  5. 2026-09-08 22:01 UTCEPSS rescore
  6. 2026-09-07 15:43 UTCGHSA enrichment
  7. 2026-09-06 16:49 UTCEG score recompute
  8. 2026-09-06 16:49 UTCGHSA enrichment
  9. 2026-09-06 13:48 UTCEPSS rescore
  10. 2026-09-05 17:55 UTCEG score recompute
  11. 2026-09-05 17:55 UTCGHSA enrichment
  12. 2026-09-04 19:00 UTCEG score recompute
  13. 2026-09-04 19:00 UTCGHSA enrichment
  14. 2026-09-04 05:07 UTCEPSS rescore
  15. 2026-09-03 20:07 UTCGHSA enrichment
  16. 2026-09-02 21:12 UTCEG score recompute▼ 1.00
  17. 2026-09-02 21:12 UTCGHSA enrichment
  18. 2026-09-02 14:12 UTCEPSS rescore
  19. 2026-09-01 20:02 UTCNVD updateCVSS v3 → 4.3
  20. 2026-09-01 19:55 UTCEG score recompute
  21. 2026-09-01 19:55 UTCGHSA enrichment
  22. 2026-09-01 13:54 UTCEPSS rescore
  23. 2026-09-01 04:40 UTCEPSS rescore
  24. 2026-09-01 04:40 UTCEPSS rescore
  25. 2026-08-31 20:25 UTCGHSA enrichment
  26. 2026-08-31 06:29 UTCEG score recompute
  27. 2026-08-31 06:28 UTCGHSA enrichment
  28. 2026-08-30 19:18 UTCEPSS rescore
  29. 2026-08-30 19:17 UTCEPSS rescore
  30. 2026-08-30 07:31 UTCEG score recompute
  31. 2026-08-30 07:31 UTCGHSA enrichment
  32. 2026-08-30 01:22 UTCEPSS rescore
  33. 2026-08-29 08:37 UTCEG score recompute
  34. 2026-08-29 08:37 UTCGHSA enrichment
  35. 2026-08-28 21:42 UTCEPSS rescore
  36. 2026-08-28 09:44 UTCEG score recompute
  37. 2026-08-28 09:44 UTCGHSA enrichment
  38. 2026-08-27 14:25 UTCEPSS rescore
  39. 2026-08-27 10:45 UTCEG score recompute
  40. 2026-08-27 10:45 UTCGHSA enrichment
  41. 2026-08-26 14:47 UTCEPSS rescore
  42. 2026-08-26 11:51 UTCEG score recompute
  43. 2026-08-26 11:51 UTCGHSA enrichment
  44. 2026-08-25 13:49 UTCEPSS rescore
  45. 2026-08-25 12:56 UTCEG score recompute
  46. 2026-08-25 12:56 UTCGHSA enrichment
  47. 2026-08-24 14:18 UTCEPSS rescore
  48. 2026-08-24 14:01 UTCEG score recompute
  49. 2026-08-24 14:01 UTCGHSA enrichment
  50. 2026-08-23 15:08 UTCEG score recompute
  51. 2026-08-23 15:08 UTCGHSA enrichment
  52. 2026-08-23 00:19 UTCEPSS rescore
  53. 2026-08-22 16:15 UTCEG score recompute
  54. 2026-08-22 16:15 UTCGHSA enrichment
  55. 2026-08-21 23:49 UTCEPSS rescore
  56. 2026-08-21 17:21 UTCEG score recompute
  57. 2026-08-21 17:21 UTCGHSA enrichment
  58. 2026-08-21 16:51 UTCEG score recompute
  59. 2026-08-21 16:51 UTCGHSA enrichment
  60. 2026-08-21 12:19 UTCGHSA enrichment
  61. 2026-08-21 11:21 UTCGHSA enrichment
  62. 2026-08-20 12:20 UTCEG score recompute
  63. 2026-08-20 11:37 UTCEG score recompute
  64. 2026-08-20 11:36 UTCMITRE cvelistV5first tracked

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 in the National Vulnerability Database 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% probability of exploitation in the next 30 days, which ranks it in the top 79.8% of all 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?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-77082, 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

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