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High severity · published Sep 14, 2026
CVE-2026-57122
PraisonAI: Webhook signature verification skipped (fail-open) when secret unset, allowing forged inbound webhooks (WhatsApp & Linear bots)
8.6
CVSS
0.2%
EPSS
No
On KEV
Description
PraisonAI is a multi-agent teams system. Prior to 4.6.59, the WhatsApp and Linear bot webhook handlers verify HMAC signatures only when WHATSAPP_APP_SECRET or LINEAR_WEBHOOK_SECRET is configured and otherwise parse and dispatch unsigned request bodies. A remote unauthenticated client that reaches the webhook route can forge messages, comments, or agent-session events, impersonate platform users, influence agent prompts and actions, and disrupt bot processing. This issue is fixed in 4.6.59.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
High
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 8% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PR
PraisonAI · MervinPraison
< 4.6.59 · source: vendor
Affected product
PR
PraisonAI
MervinPraison
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-57122
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-57122
github.com
https://github.com/MervinPraison/PraisonAI/commit/2adfe7e8323f6deec66925cf15a885b6238895e9
github.com
https://github.com/MervinPraison/PraisonAI/releases/tag/v4.6.59
github.com
https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-x92v-rpx6-p6cw
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