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VulnerabilityPublished Updated

CVE-2026-34938: MervinPraison PraisonAI · Protection Mechanism Failure

Affects MervinPraison PraisonAISource CVE Database V5

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Not known to be exploited · 13% EPSS · CVSS 10.0 Critical : upgrade to 1.5.90 as a priority.

Data as of 29 Oct 2026, 19:04 UTC

CVSS 3.1 base score
10.0Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
13.1% chance of exploitation in 30 days – higher than 96% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.5.90
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 3 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade PraisonAI and mervinpraison/PraisonAI to 1.5.90.

Affected software

ProductAffectedFixed in
MervinPraisonPraisonAIAffected
  • <1.5.90
Fixed in
  • 1.5.90
GitHubmervinpraison/PraisonAIpkg:github/mervinpraison/PraisonAIOther threatsAffected
  • <1.5.90
Fixed in
  • 1.5.90

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade PraisonAI to version 1.5.90 or later, where this vulnerability is patched. Patch status is confirmed by the version information in the description. No alternative mitigations are specified.

Description

PraisonAI is a multi-agent teams system. Prior to version 1.5.90, execute_code() in praisonai-agents runs attacker-controlled Python inside a three-layer sandbox that can be fully bypassed by passing a str subclass with an overridden startswith() method to the _safe_getattr wrapper, achieving arbitrary OS command execution on the host. This issue has been patched in version 1.5.90.

References

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