LycheeOrg Lychee up to 7.6.2 /api/v2/Zip AlbumPolicy::canDownload improper authorization

Summaryinfo

A vulnerability, which was classified as problematic, has been found in LycheeOrg Lychee up to 7.6.2. Affected by this issue is the function AlbumPolicy::canDownload of the file /api/v2/Zip. Performing a manipulation results in improper authorization. This vulnerability is cataloged as CVE-2026-61838. It is possible to initiate the attack remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in LycheeOrg Lychee up to 7.6.2. It has been classified as problematic. This affects the function AlbumPolicy::canDownload of the file /api/v2/Zip. The manipulation with an unknown input leads to a improper authorization vulnerability. CWE is classifying the issue as CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on confidentiality. The summary by CVE is:

Lychee is a free, open-source photo-management tool. Prior to 7.6.3, GET /api/v2/Zip authorizes album and photo archives through AlbumPolicy::canDownload() and PhotoPolicy::canDownload() without first enforcing AlbumPolicy::canAccess(). For a public, password-protected album with grants_download enabled, an unauthenticated attacker who knows the shared album identifier can download a ZIP archive without supplying the password or unlocking the album, even though browsing endpoints deny access. The archive exposes the album's photos and can include full-resolution originals and associated metadata when grants_full_photo_access is enabled. This issue is fixed in version 7.6.3.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-61838 since 07/10/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1548.002 for this issue.

Upgrading to version 7.6.3 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• LycheeOrg

Name

• Lychee

Version

• 7.6.0
• 7.6.1
• 7.6.2

Website

• Product: https://github.com/LycheeOrg/Lychee/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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