CVE-2026-61436

PraisonAI before 4.6.78 Missing Webhook Signature Verification

At a glance

Severity: HIGH 8.8
EPSS: EPSS 0.39 % · percentile 33 (2026-10-27)
State: PUBLISHED
Published: 2026-07-15
Updated: 2026-07-15
Assigner: VulnCheck
NVD status: Deferred

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.

Scores

Version	Score	Vector	Scored by
CVSS 4.0	HIGH 8.8	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	VulnCheck
CVSS 3.1	HIGH 8.6	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L	VulnCheck
CVSS 4.0	HIGH 8.8	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:X/V:X/RE:X/U:X	NVD · disclosure@vulncheck.com (Secondary)
CVSS 3.1	HIGH 8.6	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L	NVD · disclosure@vulncheck.com (Secondary)

Weaknesses (CWE)

CWE-287

Advisories

GHSA-7c92-x8vg-4258 — PraisonAI: AgentMail webhook mode accepts forged unsigned message.received events and invokes agents
PYSEC-2026-4252 — PraisonAI: AgentMail webhook mode accepts forged unsigned message.received events and invokes agents

European references

ENISA EUVD · EUVD-2026-44642
GCVE · GCVE-0-2026-61436

Affected products

Product	Versions
MervinPraison · PraisonAI	affected 0 < 4.6.78 ; unaffected 4.6.78

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD