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CVE-2026-75594— Kirby: Access to image files and limited access to JSON files outside of the site root via path traversal in the media handling

Quick assessment

Affected
getkirby kirby
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Kirby 是一个开源内容管理系统。在 4.9.5 和 5.5.2 之前的版本中，Kirby 的媒体处理模块（位于 ）允许 方法将带有路径的文件名拼接到经过校验的父级媒体目录中。在 Nginx、PHP 内置服务器或启用了 的 Apache 环境中，远程攻击者可以在文件名中提交编码后的斜杠字符（例如 ），从而遍历出父级媒体目录。对于存在的与不存在的缩略图配置，其响应差异会揭示任意 文件是否存在；而包含有效 键的 文件会导致所引用的图像被返回，并导致对应的任务文件被删除。此外，位于 中的 路径也接受 序列，允许访问预期

CVSS 8.2 · High
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I. Basic Information for CVE-2026-75594

Vulnerability Information
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Vulnerability Title
Kirby: Access to image files and limited access to JSON files outside of the site root via path traversal in the media handling
Source: CVE Program / CVE List V5
Vulnerability Description
Kirby is an open-source content management system. Prior to 4.9.5 and 5.5.2, depending on the release line, Kirby's media handler in src/Cms/Media.php allowed Kirby\Cms\Media::thumb() to append a path-bearing filename to a validated parent media directory. On nginx, PHP's built-in server, or Apache with AllowEncodedSlashes enabled, a remote attacker could submit encoded slash characters such as %2f in the filename and traverse outside the parent's media directory. Differences between responses for existing and nonexistent thumbnail configurations disclosed whether an arbitrary .json file existed, and a .json file containing a valid filename key could cause the referenced image to be returned and the job file to be deleted. The related file::version path in src/Filesystem/Asset.php also accepted ../ sequences outside the intended index root. This issue is fixed in versions 4.9.5 and 5.5.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
getkirby kirby < 4.9.5 -

II. Public POCs for CVE-2026-75594

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III. Intelligence Information for CVE-2026-75594

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Patches & Fixes for CVE-2026-75594 (5)

Vendor Advisories for CVE-2026-75594 (1)

Vendor Pages for CVE-2026-75594 (1)

Same Patch Batch · getkirby · 2026-08-31 · 3 CVEs total

CVE-2026-71415 7.1 HIGH Kirby: File upload permissions are not checked during processing of chunk data
CVE-2026-75592 6.9 MEDIUM Kirby: Access to image files outside of the site root via path traversal in the media hand

IV. Related Vulnerabilities

Same product: kirby
Same vendor: getkirby
Same weakness: CWE-22

V. Comments for CVE-2026-75594

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