MervinPraison PraisonAI up to 4.6.58 HTTPApproval praisonai/bots.py praisonai.bots.HTTPApproval cross site scripting

Summaryinfo

A vulnerability marked as problematic has been reported in MervinPraison PraisonAI up to 4.6.58. This vulnerability affects the function praisonai.bots.HTTPApproval of the file praisonai/bots.py of the component HTTPApproval. The manipulation leads to cross site scripting. This vulnerability is documented as CVE-2026-56840. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in MervinPraison PraisonAI up to 4.6.58. It has been rated as problematic. This issue affects the function praisonai.bots.HTTPApproval of the file praisonai/bots.py of the component HTTPApproval. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is:

PraisonAI is a multi-agent teams system. From version 4.5.2 to before version 4.6.59, praisonai.bots.HTTPApproval renders pending tool approval arguments directly into the approval dashboard HTML. An attacker-controlled tool argument can inject JavaScript into that page. When a human opens the approval URL to inspect the risky tool request, the script runs in the dashboard origin and can POST to the same request's /approve/{request_id}/decide endpoint, causing HTTPApproval to return approved=True. This issue has been patched in version 4.6.59.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-56840 since 06/23/2026. The exploitation is known to be easy. The attack may be initiated remotely. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 4.6.59 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• MervinPraison

Name

• PraisonAI

Version

• 4.6.0
• 4.6.1
• 4.6.2
• 4.6.3
• 4.6.4
• 4.6.5
• 4.6.6
• 4.6.7
• 4.6.8
• 4.6.9
• 4.6.10
• 4.6.11
• 4.6.12
• 4.6.13
• 4.6.14
• 4.6.15
• 4.6.16
• 4.6.17
• 4.6.18
• 4.6.19
• 4.6.20
• 4.6.21
• 4.6.22
• 4.6.23
• 4.6.24
• 4.6.25
• 4.6.26
• 4.6.27
• 4.6.28
• 4.6.29
• 4.6.30
• 4.6.31
• 4.6.32
• 4.6.33
• 4.6.34
• 4.6.35
• 4.6.36
• 4.6.37
• 4.6.38
• 4.6.39
• 4.6.40
• 4.6.41
• 4.6.42
• 4.6.43
• 4.6.44
• 4.6.45
• 4.6.46
• 4.6.47
• 4.6.48
• 4.6.49
• 4.6.50
• 4.6.51
• 4.6.52
• 4.6.53
• 4.6.54
• 4.6.55
• 4.6.56
• 4.6.57
• 4.6.58

Website

• Product: https://github.com/MervinPraison/PraisonAI/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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