CVE-2026-61838 Details
Description
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.
A vulnerability in Lychee photo management tool versions prior to 7.6.3 allows unauthenticated users to bypass password protection on public albums when downloading content. The issue arises because the download authorization process does not check if the album has been unlocked or requires a password, contrary to the browsing endpoints which enforce these checks. As a result, an attacker can download a ZIP archive of the album's photos, including full-resolution originals and metadata, if certain permissions are enabled, without needing to provide the album password.
Users can update to Lychee version 7.6.3 or later, where this vulnerability has been fixed.
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 15, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-735c-2wqc-x29r | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/LycheeOrg/Lychee/commit/4366dd0e721126dffe29659afec93aee9c1db711 | [email protected] | Source CodeVendor |
| https://github.com/LycheeOrg/Lychee/pull/4459 | [email protected] | Issue TrackingVendor |
| https://github.com/LycheeOrg/Lychee/releases/tag/v7.6.3 | [email protected] | Release NotesVendor |
| https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-735c-2wqc-x29r | [email protected] | AdvisoryExploitRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-285 | Improper Authorization | [email protected] |
| CWE-639 | Authorization Bypass Through User-Controlled Key | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Lychee | <= 7.6.2 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 15, 2026 | CVE Modified | CISA-ADP |
| Oct 15, 2026 | New CVE Received | [email protected] |