Is there a public exploit for CVE-2026-126364?

No public exploit for CVE-2026-126364 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-126364?

CVE-2026-126364 scores CVSS 6.3 (v4.0), rated medium. EPSS puts the chance of exploitation in the next 30 days at 0.00375%.

What does CVE-2026-126364 affect?

CVE-2026-126364 affects @astrojs/node, astro.

6.3 Medium

Astro: Image endpoint in @astrojs/node can read files from a case-variant sibling of the output directory on case-sensitive filesystems

CVE-2026-126364

Summary The /image endpoint used by the @astrojs/node adapter checks that a requested local image is inside the build output directory before reading it from disk. That check compared paths case-insensitively. On case-sensitive filesystems (such as Linux), a directory whose path differs from the output directory only by letter case is a different directory, but it passed the check. For example, with the client output directory at /srv/app/dist/client/, a request such as: text /image?href=/../../DIST/client/secret.png&w=32&f=png resolved to /srv/app/DIST/client/secret.png and was served, even though that file is outside the output directory. Impact An unauthenticated attacker can read image files from outside the output directory, but only when all of the following are true: The site uses on-demand rendering with the @astrojs/node adapter. The server runs on a case-sensitive filesystem. A directory exists whose path matches the output directory except for letter case (for example DIST/client next to dist/client). Such a layout is unusual, and the attacker cannot create it. Only files the image service accepts can be read. Raster images are returned after resizing; SVG files are…

Assessment

CVSS: 6.3 (v4.0)
Severity: Medium
EPSS: 0.00375% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 13 November 2026
Last updated: 13 November 2026
Affected: @astrojs/node · astro
Weakness: CWE-178, CWE-22

CVSS vectorCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

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