Home

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.

PUBLISHED Reserved 2026-07-09 | Published 2026-07-11 | Updated 2026-07-13 | Assigner VulnCheck




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

Problem types

Authentication Bypass by Spoofing

Product status

Default status
unaffected

Any version before 4.6.78
affected

4.6.78 (semver)
unaffected

Credits

dinhvaren reporter

References

github.com/...isonAI/security/advisories/GHSA-qj9c-59p6-8cgx exploit

github.com/...isonAI/security/advisories/GHSA-qj9c-59p6-8cgx (GitHub Security Advisory (GHSA-qj9c-59p6-8cgx)) vendor-advisory

www.vulncheck.com/...il-before-message-injection-via-webhook (VulnCheck Advisory: PraisonAI AgentMail before 4.6.78 Message Injection via Webhook) third-party-advisory

cve.org (CVE-2026-61428)

nvd.nist.gov (CVE-2026-61428)

Download JSON