CVE-2026-57568

Lychee is a free, open-source photo-management tool. Prior to 7.6.0, Lychee permits an authenticated user with album-edit permissions to store a javascript URI in an album or photo Markdown description because config/markdown.php enables allow_unsafe_links. app/Http/Resources/Models/Utils/PreformattedPhotoData.php and app/Http/Resources/Models/Utils/PreFormattedAlbumData.php convert the description to HTML, and the gallery components PhotoDetails.vue, Overlay.vue, PhotoThumb.vue, AlbumHero.vue, and AlbumCard.vue render that HTML with v-html. A visitor, including an unauthenticated visitor to a public album, who clicks the rendered link executes attacker-controlled JavaScript in the Lychee origin, which can expose session data or enable authenticated requests in the victim's context. This gallery-view flaw is distinct from CVE-2026-33738, which addressed feed rendering. This issue is fixed in version 7.6.0.

• https://github.com/LycheeOrg/Lychee/commit/f0604ead5889bfed404d6f5e1a9205f945172c7e
• https://github.com/LycheeOrg/Lychee/pull/4377
• https://github.com/LycheeOrg/Lychee/releases/tag/v7.6.0
• https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-pgfr-x389-5p2h

• https://github.com/LycheeOrg/Lychee/commit/f0604ead5889bfed404d6f5e1a9205f945172c7e
• https://github.com/LycheeOrg/Lychee/pull/4377
• https://github.com/LycheeOrg/Lychee/releases/tag/v7.6.0
• https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-pgfr-x389-5p2h

• MEDIUMCVE-2016-20098PoC
• MEDIUMCVE-2023-54408PoC
• UNSCOREDCVE-2023-5648
• MEDIUMCVE-2024-31027
• MEDIUMCVE-2024-34321
• MEDIUMCVE-2024-58391PoC
• MEDIUMCVE-2025-12828
• MEDIUMCVE-2025-13533PoC

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