Vulnary
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Critical· 9.8official fix available

CVE-2026-39890

CVE-2026-39890 allows attackers to execute arbitrary JavaScript code on a PraisonAI server by uploading a malicious YAML file. This vulnerability is fixed in version 4.5.115 of the software.

publishedApr 8, 2026
last modifiedJul 24, 2026
sourcesNVD
severity · cvss
9.8
critical · how bad it is
exploitation · epss
<1%
44th percentile · chance of exploitation in 30 days
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →
auto-deletes from the system
counting…on Aug 25, 2026

An official fix is available, so this entry is kept for 30 days and then removed automatically.

01

Who is affected

Users of PraisonAI (specifically the AgentService.loadAgentFromFile method in versions prior to 4.5.115)

02

Real-world impact

Remote code execution (RCE) on the server

03

Why this severity

Critical (CVSS 9.8) - High confidence in exploitability and severe consequences

04

What to do about it

official fix available
recommended steps
  1. 01Upgrade PraisonAI to version 4.5.115 or later to apply the security patch.

NVD description states the vulnerability is fixed in 4.5.115

05

Timeline

  1. Apr 8, 2026 · Apr 8, 2026
    Published
    Disclosed and added to the National Vulnerability Database.
  2. Jul 24, 2026 · 11d ago
    Advisory updated
    The NVD record was last revised.
  3. Jul 26, 2026 · 10d ago
    Official fix available
    A vendor patch or mitigation now exists — see the remediation steps above.
06

How it’s attacked

Attack vectorNetwork (remote)
Attack complexityLow
Privileges requiredNone
User interactionNone needed
ScopeUnchanged
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
07

References & advisories

NVD advisory ↗Search advisories ↗
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →