CVE-2026-34955Public exploit

Sandbox escape via unblocked shell executables

Published Apr 3, 2026 · Updated Apr 3, 2026

OS command injection in PraisonAI before 4.5.97 allows local users to execute blocked commands through SubprocessSandbox. Its validator checks string patterns that omit standalone sh and bash, then passes the original command to subprocess.run() with shell=True. Access to sandbox command execution, including through agent prompt injection, permits commands with the PraisonAI process's filesystem and network privileges.

CVSS severity8.8
High
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in PraisonAI before 4.5.97 allows local users to execute blocked commands through SubprocessSandbox. Its validator checks string patterns that omit standalone sh and bash, then passes the original command to subprocess.run() with shell=True. Access to sandbox command execution, including through agent prompt injection, permits commands with the PraisonAI process's filesystem and network privileges.

The record

CVE
CVE-2026-34955
Published
Apr 3, 2026
Updated
Apr 3, 2026
Vendor
Mervin Praison
Product
PraisonAI
Classifications
CWE-78, T1059.004
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Apr 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 4.5.97

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Mervin Praison · PraisonAIversion=< 4.5.97

Published CVSS scores

8.8Mervin PraisonCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Unix Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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