CVE-2026-61610

CVSS 2.3 (low) · published 2026-10-15

Lychee is a free, open-source photo-management tool. Prior to 7.6.1, when photos_star_visibility is set to anonymous, POST /api/v2/Photo::highlight can fetch and modify a photo without confirming that the caller can see it. BaseApiRequest::validateResolved() invokes SetPhotosHighlightedRequest::processValidatedValues() before authorization, and PhotoPolicy::canHighlight() returns true for anonymous callers without a canSee check. An unauthenticated attacker who can guess photo identifiers can distinguish existing private photos through differing success and not-found responses and can change their is_highlighted state, including for photos in private or password-protected albums. The issue is limited to installations using the non-default anonymous star-visibility setting. This issue is fixed in version 7.6.1.

Weakness: CWE-284

Source: NVD CVE-2026-61610

References

• https://github.com/LycheeOrg/Lychee/commit/fe07567c176bbdcda7b276bb6d664dfcd47a9b00
• https://github.com/LycheeOrg/Lychee/pull/4449
• https://github.com/LycheeOrg/Lychee/releases/tag/v7.6.1
• https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-qcqq-p4pq-7r77
• https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-qcqq-p4pq-7r77

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