CVE-2026-61436 | PraisonAI before 4.6.78 fails to verify Svix webhook signatu… | CVSS 8.6 HIGH

Description

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.

Metadata

CVE ID: CVE-2026-61436
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-07-09 14:05 UTC
Published: 2026-07-15 11:25 UTC
Last updated: 2026-07-15 12:39 UTC
Primary CWE: CWE-287
Improper Authentication
Vendor / Product: MervinPraison / PraisonAI
Sources: cve.org · NVD

Severity & Metrics

8.6 HIGH CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: yes
Tech. Impact: partial

Affected products (1)

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

Weakness (CWE)

CWE	Source	Description
CWE-287	cna	Improper Authentication

CVSS scores (2)

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

References (4)

GitHub Security Advisory (GHSA-7c92-x8vg-4258) https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-7c92-x8vg-4258
https://github.com/MervinPraison/PraisonAI/commit/846568c7a5d8ce9e71e56e4c213f027c04909753 https://github.com/MervinPraison/PraisonAI/commit/846568c7a5d8ce9e71e56e4c213f027c04909753
https://github.com/MervinPraison/PraisonAI/commit/2a855c470077c7d2e2479a575f7ef7f548d51c33 https://github.com/MervinPraison/PraisonAI/commit/2a855c470077c7d2e2479a575f7ef7f548d51c33
VulnCheck Advisory: PraisonAI before 4.6.78 Missing Webhook Signature Verification https://www.vulncheck.com/advisories/praisonai-before-missing-webhook-signature-verification