CVE-2026-8505

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-17. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

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

IBM Langflow OSS 1.0.0 through 1.10.0 has a vulnerability in Langflow's webhook authentication logic allows unauthenticated users to trigger the execution of any flow. The system incorrectly bypasses API key validation when the WEBHOOK_AUTH_ENABLE configuration is set to False (which is the default setting). This allows a remote attacker who knows a flow's UUID to execute it as if they were the owner, potentially leading to Remote Code Execution (RCE).

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
46%
KEV
Not listed

Published

July 17, 2026

Last Modified

July 23, 2026

Advisory Details (1)

Auto-updated Sep 12, 2026
No patch confirmed yet.
generic

Security Bulletin: Authentication Bypass in Webhook Endpoints Allowed Unauthorized Flow Execution

https://www.ibm.com/support/pages/node/7278921

Vendor Advisories for CVE-2026-8505(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 / 128× 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 329 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-8505?
CVE-2026-8505 is a critical vulnerability published on July 17, 2026. IBM Langflow OSS 1.0.0 through 1.10.0 has a vulnerability in Langflow's webhook authentication logic allows unauthenticated users to trigger the execution of any flow. The system incorrectly bypasses API key validation when the WEBHOOKAUTHENABLE configuration is set to False (which is the default…
When was CVE-2026-8505 disclosed?
CVE-2026-8505 was first published in the National Vulnerability Database on July 17, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8505 actively exploited?
CVE-2026-8505 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 54.5% of all scored CVEs.
What is the CVSS score of CVE-2026-8505?
CVE-2026-8505 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-8505?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8505, 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.

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