Vulnerability record · CVE-2026-61436 · published 15 July 2026

CVE-2026-61436: Improper authentication vulnerability

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.

8.8 CVSS 4.0 High EPSS 0.52% · top 58.3% CWE-287 · Improper authentication Deferred

8.8CVSS 4.0 base score

0.52%EPSS exploitation probability, 30 days

NoNot in CISA KEV

0Affected product versions listed by NVD

5References

15 Jul 2026Last modified by NVD

Description

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

Link	Tags
https://github.com/MervinPraison/PraisonAI/commit/2a855c470077c7d2e2479a575f7ef7f548d51c33
https://github.com/MervinPraison/PraisonAI/commit/846568c7a5d8ce9e71e56e4c213f027c04909753
https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-7c92-x8vg-4258
https://www.vulncheck.com/advisories/praisonai-before-missing-webhook-signature-verification
https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-7c92-x8vg-4258

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Source: NIST National Vulnerability Database (record CVE-2026-61436), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.