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VulnerabilityPublished

CVE-2026-39891: MervinPraison PraisonAI · Code Injection

Affects MervinPraison PraisonAISource CVE Database V5

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Not known to be exploited · CVSS 8.8 High : upgrade to 4.5.115 soon.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score
8.8High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.5% chance of exploitation in 30 days – higher than 46% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 4.5.115
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 8 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 30 Oct 2026.

What to do

Upgrade PraisonAI and mervinpraison/PraisonAI to 4.5.115.

Affected software

ProductAffectedFixed in
MervinPraisonPraisonAIAffected
  • <4.5.115
Fixed in
  • 4.5.115
GitHubmervinpraison/PraisonAIpkg:github/mervinpraison/PraisonAIOther threatsAffected
  • <4.5.115
Fixed in
  • 4.5.115

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 4.5.115 or later, where this vulnerability is fixed. Until patched, avoid passing unescaped user input to the create_agent_centric_tools() function.

Description

CVE-2026-39891 is a high-severity code injection vulnerability in MervinPraison's PraisonAI versions prior to 4.5.115. The vulnerability arises because the create_agent_centric_tools() function returns tools that process file content using template rendering without properly escaping user input from agent.start(). This allows template expressions in the input to be executed as code rather than treated as literal text. The issue is fixed in version 4.5.115. No known exploits are reported in the wild, and the product is not a cloud service.

References

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