MervinPraison PraisonAI up to 4.6.77 AgentMail Webhook Mode sender/content data authenticity

Summaryinfo

A vulnerability marked as critical has been reported in MervinPraison PraisonAI up to 4.6.77. This issue affects some unknown processing of the component AgentMail Webhook Mode. The manipulation of the argument sender/content leads to data authenticity. This vulnerability is traded as CVE-2026-61436. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in MervinPraison PraisonAI up to 4.6.77 and classified as critical. This issue affects an unknown code of the component AgentMail Webhook Mode. The manipulation of the argument sender/content with an unknown input leads to a data authenticity vulnerability. Using CWE to declare the problem leads to CWE-345. The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

PraisonAI before 4.6.78 fails to verify Svix webhook signatures in AgentMail webhook mode, allowing unauthenticated attackers to forge message.received events. Attackers can send crafted JSON payloads to the webhook endpoint to invoke configured agents with arbitrary sender addresses and message content.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-61436 since 07/09/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available.

Upgrading to version 4.6.78 eliminates this vulnerability.

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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
• 4.6.59
• 4.6.60
• 4.6.61
• 4.6.62
• 4.6.63
• 4.6.64
• 4.6.65
• 4.6.66
• 4.6.67
• 4.6.68
• 4.6.69
• 4.6.70
• 4.6.71
• 4.6.72
• 4.6.73
• 4.6.74
• 4.6.75
• 4.6.76
• 4.6.77

Website

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

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