CVE-2026-61611 Details
Description
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.
A brute-force vulnerability has been identified in Lychee, a photo management tool, in versions prior to 7.6.1. The issue resides in the POST /api/v2/Album::unlock endpoint, which lacks proper rate limiting, attempt tracking, and security measures such as CAPTCHA or account lockout. This oversight allows remote, unauthenticated attackers to automate password guesses for albums protected by passwords. If successful, they can access the private photos within the album.
Users can update to Lychee version 7.6.1 or later, where this vulnerability has been fixed. Instructions for downloading the latest version are available on the Lychee GitHub Releases page.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 15, 2026CISA-ADP
Assessed Oct 29, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-48vf-fwx6-2ph6 | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/LycheeOrg/Lychee/commit/592291458a3373114a21412956fd23cfcda32aba | [email protected] | Source CodeVendor |
| https://github.com/LycheeOrg/Lychee/pull/4448 | [email protected] | Issue TrackingVendor |
| https://github.com/LycheeOrg/Lychee/releases/tag/v7.6.1 | [email protected] | Release NotesVendor |
| https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-48vf-fwx6-2ph6 | [email protected] | AdvisoryExploitRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-307 | Improper Restriction of Excessive Authentication Attempts | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| LycheeOrg Lychee | <= 7.6.0 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 29, 2026 | CVE Modified | CISA-ADP |
| Oct 15, 2026 | New CVE Received | [email protected] |