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  5. CVE-2026-29905

CVE-2026-29905: Withdrawn Advisory: Kirby CMS has Persistent DoS via Malformed Image Upload

March 27, 2026 (updated April 30, 2026)

Kirby CMS through version 5.1.4 allows an authenticated user with Editor permissions to cause a persistent Denial of Service (DoS) via a malformed image upload.

References

  • drive.google.com/file/d/1MwvvSYIwnC8kOIzjycGMQZw4d2K2ef8h/view?usp=sharing
  • github.com/Stalin-143/CVE-2026-29905
  • github.com/Stalin-143/CVE-2026-29905/security/advisories/GHSA-cw7v-45wm-mcf2
  • github.com/advisories/GHSA-cw7v-45wm-mcf2
  • github.com/getkirby/kirby/releases/tag/5.2.0-rc.1
  • github.com/github/advisory-database/pull/7503
  • nvd.nist.gov/vuln/detail/CVE-2026-29905

Code Behaviors & Features

Detect and mitigate CVE-2026-29905 with GitLab Dependency Scanning

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Affected versions

All versions before 5.2.0-rc.1

Fixed versions

  • 5.2.0-rc.1

Solution

Upgrade to version 5.2.0-rc.1 or above.

Impact 6.5 MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Learn more about CVSS

Weakness

  • CWE-20: Improper Input Validation
  • CWE-252: Unchecked Return Value

Source file

packagist/getkirby/cms/CVE-2026-29905.yml

Spotted a mistake? Edit the file on GitLab.

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