CVE-2026-39891: MervinPraison PraisonAI · Code Injection
Affects MervinPraison PraisonAISource CVE Database V5
Not known to be exploited · CVSS 8.8 High : upgrade to 4.5.115 soon.
Data as of 30 Oct 2026, 11:52 UTC
- 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:HExploitation evidence
Disclosed: evidence found.
CVE published 8 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| MervinPraisonPraisonAI | Affected
| Fixed in
|
GitHubmervinpraison/PraisonAIpkg:github/mervinpraison/PraisonAIOther threats | Affected
| Fixed in
|
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.