CVE-2026-77069

MEDIUMNVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

Score 4.3 from GitHub Security Advisory (severity: LOW) 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: 0.3%CVSS: 4.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

n8n before 1.123.69, 2.33.4, and 2.34.1 contains an SSRF protection bypass in the OAuth2 credential authorization-code-to-access-token exchange. While OAuth2 discovery and dynamic-client-registration requests use n8n's SSRF-protected HTTP client, the token exchange uses a separate client with no SSRF guard. A user with credential-creation permissions can set the access-token URL to an internal address and complete the OAuth2 flow, causing n8n to send a fixed-shape token-exchange POST to that target and reflect its response body back to the attacker (limited to what the target returns to this specific request).

CVSS v3
4.3
EG Score
4.3MEDIUMmedium confidence
EG Risk
19
EG Risk 19/100CISA 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
0.3%
EPSS %ILE
19th
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 Sep 1, 2026
Patch available. Sources: github.
generic

n8n before 1.123.69 SSRF Protection Bypass via OAuth2 | Advisories | VulnCheck

https://www.vulncheck.com/advisories/n8n-before-ssrf-protection-bypass-via-oauth2
github Patch Available

SSRF Protection Bypass via OAuth2 Credential Token Exchange Reflects Internal Response Body · Advisory · n8n-io/n8n · GitHub

https://github.com/n8n-io/n8n/security/advisories/GHSA-c4f6-59xq-95ww

Vendor Advisories for CVE-2026-77069(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 18× in last 7d / 79× 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 122 total refreshes for this CVE.

  1. 2026-10-05 01:39 UTCEG score recompute
  2. 2026-10-05 01:39 UTCGHSA enrichment
  3. 2026-10-04 23:22 UTCEPSS rescore
  4. 2026-10-04 03:11 UTCEG score recompute
  5. 2026-10-04 03:11 UTCGHSA enrichment
  6. 2026-10-03 14:26 UTCEPSS rescore
  7. 2026-10-03 05:11 UTCEG score recompute
  8. 2026-10-03 05:11 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 06:25 UTCEG score recompute
  13. 2026-10-01 06:25 UTCGHSA enrichment
  14. 2026-09-30 08:25 UTCEG score recompute
  15. 2026-09-30 08:25 UTCGHSA enrichment
  16. 2026-09-29 15:24 UTCEPSS rescore
  17. 2026-09-28 23:27 UTCEG score recompute
  18. 2026-09-28 23:27 UTCGHSA enrichment
  19. 2026-09-28 13:52 UTCEPSS rescore
  20. 2026-09-28 01:26 UTCEG score recompute
  21. 2026-09-28 01:26 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 21:49 UTCEG score recompute
  9. 2026-09-22 21:49 UTCGHSA enrichment
  10. 2026-09-22 16:01 UTCEPSS rescore
  11. 2026-09-21 23:48 UTCEG score recompute
  12. 2026-09-21 23:48 UTCGHSA enrichment
  13. 2026-09-21 21:09 UTCEPSS rescore
  14. 2026-09-21 01:46 UTCEG score recompute
  15. 2026-09-21 01:46 UTCGHSA enrichment
  16. 2026-09-20 20:16 UTCEPSS rescore
  17. 2026-09-20 03:08 UTCEG score recompute
  18. 2026-09-20 03:07 UTCGHSA enrichment
  19. 2026-09-19 05:05 UTCEG score recompute
  20. 2026-09-19 05:04 UTCGHSA enrichment
  21. 2026-09-18 19:28 UTCEPSS rescore
  22. 2026-09-18 07:03 UTCEG score recompute
  23. 2026-09-18 07:03 UTCGHSA enrichment
  24. 2026-09-17 09:02 UTCEG score recompute
  25. 2026-09-17 09:02 UTCGHSA enrichment
  26. 2026-09-16 14:08 UTCEPSS rescore
  27. 2026-09-16 11:01 UTCEG score recompute
  28. 2026-09-16 11:01 UTCGHSA enrichment
  29. 2026-09-16 05:15 UTCEPSS rescore
  30. 2026-09-15 13:00 UTCEG score recompute
  31. 2026-09-15 13:00 UTCGHSA enrichment
  32. 2026-09-15 03:12 UTCEPSS rescore
  33. 2026-09-14 14:58 UTCGHSA enrichment
  34. 2026-09-13 16:57 UTCEG score recompute
  35. 2026-09-13 16:57 UTCGHSA enrichment
  36. 2026-09-12 18:55 UTCEG score recompute
  37. 2026-09-12 18:55 UTCGHSA enrichment
  38. 2026-09-12 15:02 UTCEPSS rescore
  39. 2026-09-11 20:54 UTCEG score recompute
  40. 2026-09-11 20:54 UTCGHSA enrichment
  41. 2026-09-11 14:53 UTCEPSS rescore
  42. 2026-09-10 22:53 UTCEG score recompute
  43. 2026-09-10 22:53 UTCGHSA enrichment
  44. 2026-09-10 09:35 UTCEPSS rescore
  45. 2026-09-10 00:52 UTCGHSA enrichment
  46. 2026-09-09 02:06 UTCEG score recompute
  47. 2026-09-09 02:06 UTCGHSA enrichment
  48. 2026-09-08 22:01 UTCEPSS rescore
  49. 2026-09-07 11:23 UTCEG score recompute
  50. 2026-09-07 11:23 UTCGHSA enrichment
  51. 2026-09-06 13:48 UTCEPSS rescore
  52. 2026-09-06 13:20 UTCEG score recompute
  53. 2026-09-06 13:20 UTCGHSA enrichment
  54. 2026-09-05 15:19 UTCGHSA enrichment
  55. 2026-09-04 17:16 UTCEG score recompute
  56. 2026-09-04 17:16 UTCGHSA enrichment
  57. 2026-09-04 05:07 UTCEPSS rescore
  58. 2026-09-03 19:13 UTCGHSA enrichment
  59. 2026-09-02 21:12 UTCEG score recompute
  60. 2026-09-02 21:12 UTCGHSA enrichment
  61. 2026-09-02 14:12 UTCEPSS rescore
  62. 2026-09-01 20:21 UTCGHSA enrichment
  63. 2026-09-01 19:35 UTCEG score recompute▲ 2.00
  64. 2026-09-01 19:35 UTCGHSA enrichment
  65. 2026-09-01 19:25 UTCNVD updateCVSS v3 → 4.3 · severity → MEDIUM
  66. 2026-09-01 13:54 UTCEPSS rescore
  67. 2026-09-01 04:40 UTCEPSS rescore
  68. 2026-09-01 04:40 UTCEPSS rescore
  69. 2026-08-31 20:25 UTCEG score recompute
  70. 2026-08-31 20:25 UTCGHSA enrichment
  71. 2026-08-30 19:18 UTCEPSS rescore
  72. 2026-08-30 19:17 UTCEPSS rescore
  73. 2026-08-30 18:48 UTCEG score recompute
  74. 2026-08-30 18:48 UTCGHSA enrichment
  75. 2026-08-30 01:22 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-77069?
CVE-2026-77069 is a medium vulnerability published on August 20, 2026. n8n before 1.123.69, 2.33.4, and 2.34.1 contains an SSRF protection bypass in the OAuth2 credential authorization-code-to-access-token exchange. While OAuth2 discovery and dynamic-client-registration requests use n8n's SSRF-protected HTTP client, the token exchange uses a separate client with no…
When was CVE-2026-77069 disclosed?
CVE-2026-77069 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-2026-77069 actively exploited?
CVE-2026-77069 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (19th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-77069?
CVE-2026-77069 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-77069?
A fix for CVE-2026-77069 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-77069 are linked in the Vendor Advisories panel on this page.

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