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CVE-2026-62679: Lychee is a free, open-source photo-management tool

Severity

8.9 (HIGH)

Affected versions

Before 7.6.4

Fixed version

7.6.4.

Patch status

Patched

Published

2026-10-15T17:17:26.820

Modified

2026-10-15T17:17:26.820

Why it matters

This matters because the affected product may allow code execution. Prioritize systems that are internet-facing or have privileged access to other infrastructure.

Recommended admin actions

• Review and patch based on exposure, asset criticality, and business impact.
• Compare installed versions against the affected version range in the advisory.
• Review logs for suspicious activity related to the affected application or component.

Technical summary

Lychee is a free, open-source photo-management tool. Prior to 7.6.4, SecurePathController, which serves GET /image/{path}, concatenates the attacker-controlled path with the local storage root and performs a string-prefix check before canonicalizing dot segments. Under the supported non-default configuration with temporary_image_link_enabled enabled, temporary_image_link_when_logged_in disabled, and secure_image_link_enabled disabled, any authenticated user can submit encoded traversal segments that pass the prefix check and are later resolved by filesystem operations. This permits reading files available to the web process, including application configuration and other users' private images, and disclosed APP_KEY or database credentials can enable further compromise. This issue is fixed in version 7.6.4.

View the official NVD record for CVE-2026-62679

CVE data is sourced from NVD/CNA records and optional enrichment. Validate against the vendor advisory before taking production action.