LycheeOrg Lychee up to 7.6.0 Unlock Unlock.php authorize improper authorization

Summaryinfo

A vulnerability labeled as problematic has been found in LycheeOrg Lychee up to 7.6.0. The impacted element is the function UnlockAlbumRequest::authorize of the file app/Actions/Album/Unlock.php of the component Unlock. Executing a manipulation can lead to improper authorization. The identification of this vulnerability is CVE-2026-61611. The attack may be launched remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic was found in LycheeOrg Lychee up to 7.6.0. This vulnerability affects the function UnlockAlbumRequest::authorize of the file app/Actions/Album/Unlock.php of the component Unlock. The manipulation with an unknown input leads to a improper authorization vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality. CVE summarizes:

Lychee is a free, open-source photo-management tool. Prior to 7.6.1, POST /api/v2/Album::unlock has no throttle, attempt counter, backoff, CAPTCHA, or lockout. UnlockAlbumRequest::authorize() permits any caller to submit attempts, and app/Actions/Album/Unlock.php verifies each guess with Hash::check without limiting repeated failures. A remote unauthenticated attacker who knows or can obtain an album identifier can automate password guesses against a password-protected album and, if the password is recovered, gain access to its private photo collection. This issue is fixed in version 7.6.1.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-61611 since 07/10/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1548.002.

By approaching the search of inurl:app/Actions/Album/Unlock.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 7.6.1 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• LycheeOrg

Name

• Lychee

Version

• 7.0
• 7.1
• 7.2
• 7.3
• 7.4
• 7.5
• 7.6.0

Website

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

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Once again VulDB remains the best source for vulnerability data.

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