CVE-2026-61428 | PraisonAI AgentMail versions before 4.6.78 lack signature ve… | CVSS 7.3 HIGH

Description

PraisonAI AgentMail versions before 4.6.78 lack signature verification in webhook mode, allowing unauthenticated attackers to inject messages with spoofed sender addresses. Attackers can POST crafted message.received events to the webhook endpoint to inject arbitrary content into the agent and trigger replies to attacker-controlled addresses, bypassing sender allow/block lists.

Metadata

CVE ID: CVE-2026-61428
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-07-09 14:05 UTC
Published: 2026-07-11 13:01 UTC
Last updated: 2026-07-11 13:01 UTC
Primary CWE: CWE-290
Authentication Bypass by Spoofing
Vendor / Product: MervinPraison / PraisonAI
Sources: cve.org · NVD

Severity & Metrics

7.3 HIGH CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Affected products (1)

Vendor	Product	Platform	Versions
MervinPraison	PraisonAI	—	0 < 4.6.78, 4.6.78

Weakness (CWE)

CWE	Source	Description
CWE-290	cna	Authentication Bypass by Spoofing

CVSS scores (2)

Score	Severity	Version	Source	Vector
7.3	HIGH	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
6.9	MEDIUM	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

References (2)

GitHub Security Advisory (GHSA-qj9c-59p6-8cgx) https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-qj9c-59p6-8cgx
VulnCheck Advisory: PraisonAI AgentMail before 4.6.78 Message Injection via Webhook https://www.vulncheck.com/advisories/praisonai-agentmail-before-message-injection-via-webhook