CVE-2026-34935

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.8%, top 46% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
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: Elevated riskExposed: 0

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

PraisonAI is a multi-agent teams system. From version 4.5.15 to before version 4.5.69, the --mcp CLI argument is passed directly to shlex.split() and forwarded through the call chain to anyio.open_process() with no validation, allowlist check, or sanitization at any hop, allowing arbitrary OS command execution as the process user. This issue has been patched in version 4.5.69.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
75(Attend)
EG Risk 75/100SSVC: 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
Severity98% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
55%
KEV
Not listed

Published

April 3, 2026

Last Modified

July 24, 2026

Advisory Details (2)

Auto-updated Aug 22, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github.
github Patch Available🟡 PoC Available

OS Command Injection in MCPHandler.parse_mcp_command() -- PraisonAI · Advisory · MervinPraison/PraisonAI · GitHub

https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-9gm9-c8mq-vq7m
github_commit Patch Available

commit 47bff65413be (MervinPraison/PraisonAI)

Patch available: MervinPraison/PraisonAI v4.6.136 (contains commit 47bff65413be)

https://github.com/MervinPraison/PraisonAI/commit/47bff65413beaa3c21bf633c1fae4e684348368c

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
praisonai4.5.15 ... 4.5.68 (48 versions)4.5.69—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 5× in last 7d / 37× 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 138 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-34935?
CVE-2026-34935 is a critical vulnerability published on April 3, 2026. PraisonAI is a multi-agent teams system. From version 4.5.15 to before version 4.5.69, the --mcp CLI argument is passed directly to shlex.split() and forwarded through the call chain to anyio.open_process() with no validation, allowlist check, or sanitization at any hop, allowing arbitrary OS…
When was CVE-2026-34935 disclosed?
CVE-2026-34935 was first published in the National Vulnerability Database on April 3, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-34935 actively exploited?
CVE-2026-34935 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 45.4% of all scored CVEs.
What is the CVSS score of CVE-2026-34935?
CVE-2026-34935 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-34935?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-34935, 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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