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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Kirby个人开发者的一款内容管理服务。 Kirby 4.9.5之前版本和5.0.0至5.5.2之前版本存在路径遍历漏洞，该漏洞源于src/Cms/Media.php中的媒体处理器允许将包含路径的文件名附加到已验证的父媒体目录，且src/Filesystem/Asset.php中的相关路径接受../序列，可能导致远程攻击者通过编码斜杠字符遍历目录，泄露任意.json文件是否存在，并可能导致相关文件被删除。

CVSS 8.2 · High EPSS 0.76% · P54

Affected Version Matrix 2

VendorProduct Version RangeStatus
getkirby kirby < 4.9.5 affected
>= 5.0.0, < 5.5.2 affected
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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
Vulnerability Title
Kirby 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Kirby是Kirby个人开发者的一款内容管理服务。 Kirby 4.9.5之前版本和5.0.0至5.5.2之前版本存在路径遍历漏洞，该漏洞源于src/Cms/Media.php中的媒体处理器允许将包含路径的文件名附加到已验证的父媒体目录，且src/Filesystem/Asset.php中的相关路径接受../序列，可能导致远程攻击者通过编码斜杠字符遍历目录，泄露任意.json文件是否存在，并可能导致相关文件被删除。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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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