CVE-2026-69089

Description

Grav CMS 2.0.10 contains a path traversal vulnerability in ImageMedium::watermark(), which passes its unsanitized $image argument to RocketTheme\Toolbox\ResourceLocator\UniformResourceLocator::findResource(). Because the file:// scheme branch only lexically collapses '..' segments without a realpath/containment check, an editor authoring Markdown image syntax with traversal sequences can cause arbitrary image files outside Grav's media sandbox to be composited into a carrier image, which is then cached and served from a public, unauthenticated URL — disclosing those files to anonymous visitors.

References

• https://github.com/getgrav/grav/commit/b282200a65ce979377963180629babd2335212ba
• https://github.com/getgrav/grav/commit/c569a53304cd7d95ff21bffa6fc590adcf0be83d
• https://github.com/getgrav/grav/commit/db8c1fcd63aaaf6d6b244bc6b4cfa5f7b96bbc7f
• https://github.com/getgrav/grav/security/advisories/GHSA-w3f4-8pj2-599w
• https://www.vulncheck.com/advisories/grav-cms-before-path-traversal-via-watermark