CVE-2026-61427

HIGHPre-NVD 7.37.3—
EchelonGraph scoreMEDIUM confidence

Score 7.3 from GitHub Security Advisory published 2026-07-15. a secondary CVSS source baseline 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
7.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.3Exploit: Elevated riskExposed: 0

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

PraisonAI before 4.6.78 exposes the MCP HTTP-stream transport without authentication by default: the CLI --api-key option defaults to None, and the server only enforces Authorization/Bearer checks when an API key is configured. When an operator runs 'praisonai mcp serve --transport http-stream' without an API key, an unauthenticated client (no Authorization header, and no Origin header, which is also permitted) can initialize a session, enumerate the available tools (tools/list), and invoke tools (tools/call). Additionally, the dispatcher forwards tool-call arguments to handlers without validating them against the advertised inputSchema. The server binds to 127.0.0.1 by default, so remote exploitation requires the operator to bind to a network-accessible address (e.g., --host 0.0.0.0).

CVSS v3
7.3
EG Score
7.3(medium)
EG Risk
64(Attend)
EG Risk 64/100SSVC: Attend

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
Severity73% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
32%
KEV
Not listed

Published

July 15, 2026

Last Modified

July 16, 2026

Advisory Details (2)

Auto-updated Jul 15, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

PraisonAI before 4.6.78 Authentication Bypass via HTTP-stream | Advisories | VulnCheck

https://www.vulncheck.com/advisories/praisonai-before-authentication-bypass-via-http-stream
github Patch Available🟡 PoC Available

MCP HTTP-stream transport is unauthenticated by default, exposing tool enumeration and an unvalidated tool-call surface · Advisory · MervinPraison/PraisonAI · GitHub

https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-hc5v-gxvj-58wh

Vendor Advisories for CVE-2026-61427(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 / 113× 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 156 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-61427?
CVE-2026-61427 is a high vulnerability published on July 15, 2026. PraisonAI before 4.6.78 exposes the MCP HTTP-stream transport without authentication by default: the CLI --api-key option defaults to None, and the server only enforces Authorization/Bearer checks when an API key is configured. When an operator runs 'praisonai mcp serve --transport http-stream'…
When was CVE-2026-61427 disclosed?
CVE-2026-61427 was first published in the National Vulnerability Database on July 15, 2026, with the most recent update on July 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-61427 actively exploited?
CVE-2026-61427 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 68.2% of all scored CVEs.
What is the CVSS score of CVE-2026-61427?
CVE-2026-61427 has a CVSS v3 base score of 7.3 (NVD).
How do I remediate CVE-2026-61427?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-61427, 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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