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%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, 2.33.4, 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
4.3(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
7%
KEV
Not listed

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 20× in last 7d / 72× 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. 2026-09-21 01:46 UTCEG score recompute
  2. 2026-09-21 01:46 UTCGHSA enrichment
  3. 2026-09-20 20:16 UTCEPSS rescore
  4. 2026-09-20 03:08 UTCEG score recompute
  5. 2026-09-20 03:07 UTCGHSA enrichment
  6. 2026-09-19 05:05 UTCEG score recompute
  7. 2026-09-19 05:04 UTCGHSA enrichment
  8. 2026-09-18 19:28 UTCEPSS rescore
  9. 2026-09-18 07:03 UTCEG score recompute
  10. 2026-09-18 07:03 UTCGHSA enrichment
  11. 2026-09-17 09:02 UTCEG score recompute
  12. 2026-09-17 09:02 UTCGHSA enrichment
  13. 2026-09-16 14:08 UTCEPSS rescore
  14. 2026-09-16 11:01 UTCEG score recompute
  15. 2026-09-16 11:01 UTCGHSA enrichment
  16. 2026-09-16 05:15 UTCEPSS rescore
  17. 2026-09-15 13:00 UTCEG score recompute
  18. 2026-09-15 13:00 UTCGHSA enrichment
  19. 2026-09-15 03:12 UTCEPSS rescore
  20. 2026-09-14 14:58 UTCGHSA enrichment
  21. 2026-09-13 16:57 UTCEG score recompute
  22. 2026-09-13 16:57 UTCGHSA enrichment
  23. 2026-09-12 18:55 UTCEG score recompute
  24. 2026-09-12 18:55 UTCGHSA enrichment
  25. 2026-09-12 15:02 UTCEPSS rescore
Show 59 more
  1. 2026-09-11 20:54 UTCEG score recompute
  2. 2026-09-11 20:54 UTCGHSA enrichment
  3. 2026-09-11 14:53 UTCEPSS rescore
  4. 2026-09-10 22:53 UTCEG score recompute
  5. 2026-09-10 22:53 UTCGHSA enrichment
  6. 2026-09-10 09:35 UTCEPSS rescore
  7. 2026-09-10 00:52 UTCGHSA enrichment
  8. 2026-09-09 02:06 UTCEG score recompute
  9. 2026-09-09 02:06 UTCGHSA enrichment
  10. 2026-09-08 22:01 UTCEPSS rescore
  11. 2026-09-07 11:23 UTCEG score recompute
  12. 2026-09-07 11:23 UTCGHSA enrichment
  13. 2026-09-06 13:48 UTCEPSS rescore
  14. 2026-09-06 13:20 UTCEG score recompute
  15. 2026-09-06 13:20 UTCGHSA enrichment
  16. 2026-09-05 15:19 UTCGHSA enrichment
  17. 2026-09-04 17:16 UTCEG score recompute
  18. 2026-09-04 17:16 UTCGHSA enrichment
  19. 2026-09-04 05:07 UTCEPSS rescore
  20. 2026-09-03 19:13 UTCGHSA enrichment
  21. 2026-09-02 21:12 UTCEG score recompute
  22. 2026-09-02 21:12 UTCGHSA enrichment
  23. 2026-09-02 14:12 UTCEPSS rescore
  24. 2026-09-01 20:21 UTCGHSA enrichment
  25. 2026-09-01 19:35 UTCEG score recompute▲ 2.00
  26. 2026-09-01 19:35 UTCGHSA enrichment
  27. 2026-09-01 19:25 UTCNVD updateCVSS v3 → 4.3 · severity → MEDIUM
  28. 2026-09-01 13:54 UTCEPSS rescore
  29. 2026-09-01 04:40 UTCEPSS rescore
  30. 2026-09-01 04:40 UTCEPSS rescore
  31. 2026-08-31 20:25 UTCEG score recompute
  32. 2026-08-31 20:25 UTCGHSA enrichment
  33. 2026-08-30 19:18 UTCEPSS rescore
  34. 2026-08-30 19:17 UTCEPSS rescore
  35. 2026-08-30 18:48 UTCEG score recompute
  36. 2026-08-30 18:48 UTCGHSA enrichment
  37. 2026-08-30 01:22 UTCEPSS rescore
  38. 2026-08-28 21:42 UTCEPSS rescore
  39. 2026-08-27 16:38 UTCEG score recompute
  40. 2026-08-27 16:38 UTCGHSA enrichment
  41. 2026-08-27 14:25 UTCEPSS rescore
  42. 2026-08-26 14:47 UTCEPSS rescore
  43. 2026-08-25 13:49 UTCEPSS rescore
  44. 2026-08-24 14:29 UTCEG score recompute
  45. 2026-08-24 14:28 UTCGHSA enrichment
  46. 2026-08-24 14:18 UTCEPSS rescore
  47. 2026-08-23 00:19 UTCEPSS rescore
  48. 2026-08-21 23:49 UTCEPSS rescore
  49. 2026-08-21 12:19 UTCEG score recompute
  50. 2026-08-21 12:19 UTCGHSA enrichment
  51. 2026-08-21 11:30 UTCEG score recompute
  52. 2026-08-21 11:30 UTCGHSA enrichment
  53. 2026-08-20 16:34 UTCEG score recompute
  54. 2026-08-20 16:34 UTCGHSA enrichment
  55. 2026-08-20 15:57 UTCEG score recompute
  56. 2026-08-20 15:57 UTCGHSA enrichment
  57. 2026-08-20 12:20 UTCEG score recompute
  58. 2026-08-20 11:37 UTCEG score recompute
  59. 2026-08-20 11:36 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

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 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-2026-77069 actively exploited?
CVE-2026-77069 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 92.9% of all 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?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-77069, 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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