MervinPraison PraisonAI up to 4.5.89 passthrough/apassthrough api_base server-side request forgery

Summaryinfo

A vulnerability categorized as critical has been discovered in MervinPraison PraisonAI up to 4.5.89. Affected is the function passthrough/apassthrough. Such manipulation of the argument api_base leads to server-side request forgery. This vulnerability is traded as CVE-2026-34936. The attack may be launched remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in MervinPraison PraisonAI up to 4.5.89 and classified as critical. Affected by this issue is the function passthrough/apassthrough. The manipulation of the argument api_base with an unknown input leads to a server-side request forgery vulnerability. Using CWE to declare the problem leads to CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. Impacted is confidentiality, integrity, and availability. CVE summarizes:

PraisonAI is a multi-agent teams system. Prior to version 4.5.90, passthrough() and apassthrough() in praisonai accept a caller-controlled api_base parameter that is concatenated with endpoint and passed directly to httpx.Client.request() when the litellm primary path raises AttributeError. No URL scheme validation, private IP filtering, or domain allowlist is applied, allowing requests to any host reachable from the server. This issue has been patched in version 4.5.90.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-34936 since 03/31/2026. The exploitation is known to be easy. The attack may be launched remotely. There are known technical details, but no exploit is available.

Upgrading to version 4.5.90 eliminates this vulnerability.

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Productinfo

Vendor

• MervinPraison

Name

• PraisonAI

Version

• 4.5.0
• 4.5.1
• 4.5.2
• 4.5.3
• 4.5.4
• 4.5.5
• 4.5.6
• 4.5.7
• 4.5.8
• 4.5.9
• 4.5.10
• 4.5.11
• 4.5.12
• 4.5.13
• 4.5.14
• 4.5.15
• 4.5.16
• 4.5.17
• 4.5.18
• 4.5.19
• 4.5.20
• 4.5.21
• 4.5.22
• 4.5.23
• 4.5.24
• 4.5.25
• 4.5.26
• 4.5.27
• 4.5.28
• 4.5.29
• 4.5.30
• 4.5.31
• 4.5.32
• 4.5.33
• 4.5.34
• 4.5.35
• 4.5.36
• 4.5.37
• 4.5.38
• 4.5.39
• 4.5.40
• 4.5.41
• 4.5.42
• 4.5.43
• 4.5.44
• 4.5.45
• 4.5.46
• 4.5.47
• 4.5.48
• 4.5.49
• 4.5.50
• 4.5.51
• 4.5.52
• 4.5.53
• 4.5.54
• 4.5.55
• 4.5.56
• 4.5.57
• 4.5.58
• 4.5.59
• 4.5.60
• 4.5.61
• 4.5.62
• 4.5.63
• 4.5.64
• 4.5.65
• 4.5.66
• 4.5.67
• 4.5.68
• 4.5.69
• 4.5.70
• 4.5.71
• 4.5.72
• 4.5.73
• 4.5.74
• 4.5.75
• 4.5.76
• 4.5.77
• 4.5.78
• 4.5.79
• 4.5.80
• 4.5.81
• 4.5.82
• 4.5.83
• 4.5.84
• 4.5.85
• 4.5.86
• 4.5.87
• 4.5.88
• 4.5.89

Website

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

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