# CVE-2026-61436: MervinPraison PraisonAI missing webhook signature verification in AgentMail

Source: https://junglewise.ai/threats/cve-2026-61436-mervinpraison-praisonai-missing-webhook-signature-verification-in  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-15. Updated: 2026-07-15  
License: CC BY 4.0 with a link back

CVE-2026-61436 · Severity: high · CVSS 8.6 · Published 2026-07-15

PraisonAI, a platform for managing AI agents, contains a security flaw in its AgentMail webhook integration. The system fails to verify digital signatures on incoming messages, allowing unauthorized outsiders to send fake instructions or data to the AI agents. This could lead to the AI performing unintended actions or processing fraudulent information as if it came from a trusted source.

Technologies: [praisonai (PyPI)](https://junglewise.ai/threats/technologies/pypi-praisonai). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2026-61436 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-61436 being exploited in the wild.

**How severe is CVE-2026-61436?** High severity, with a CVSS score of 8.6, published 15 July 2026.

**Which products and versions are affected?** praisonai (PyPI) <= 4.6.77, ECOSYSTEM:introduced=0,fixed=4.6.78.

**Is there a fix for CVE-2026-61436?** Yes. praisonai (PyPI): upgrade to 4.6.78 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-61436 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-61436?** Check whether you run praisonai (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- praisonai (PyPI): upgrade to 4.6.78 or later

  ```sh
  pip install "praisonai>=4.6.78"
  ```


## Technical details

PraisonAI's AgentMail component fails to perform cryptographic verification of Svix webhook signatures when operating in webhook mode. The vulnerability exists in the `_handle_email_webhook()` function within `src/praisonai/praisonai/bots/agentmail.py`, which processes incoming JSON payloads without validating the `svix-signature` header against the `AGENTMAIL_WEBHOOK_SECRET`. An unauthenticated remote attacker can send crafted POST requests to the aiohttp webhook endpoint to forge `message.received` events. This allows the attacker to invoke configured AI agents with arbitrary sender addresses and message content, potentially leading to unauthorized data processing or agent manipulation. The issue is resolved in version 4.6.78.

## Affected products

- MervinPraison PraisonAI < 4.6.78

## Identifiers

- CVE-2026-61436
- GHSA-7c92-x8vg-4258
- PYSEC-2026-4252

## Timeline

- 2026-06-25: advisory: GitHub Security Advisory GHSA-7c92-x8vg-4258 published
- 2026-07-15: disclosed: CVE-2026-61436 published to NVD

## References

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

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