{"id":"CVE-2026-61610","state":"PUBLISHED","title":"Lychee: unauthenticated photo starring reveals existence of private photos when photos_star_visibility=anonymous","description":"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.","publishedAt":"2026-10-15T16:26:16.585Z","updatedAt":"2026-10-20T02:48:31.094Z","severity":{"score":2.3,"label":"Low","version":"4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["LycheeOrg Lychee"],"affected":[{"vendor":"LycheeOrg","product":"Lychee","versions":[{"version":"< 7.6.1","status":"affected"}]}],"references":["https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-qcqq-p4pq-7r77","https://github.com/LycheeOrg/Lychee/pull/4449","https://github.com/LycheeOrg/Lychee/commit/fe07567c176bbdcda7b276bb6d664dfcd47a9b00","https://github.com/LycheeOrg/Lychee/releases/tag/v7.6.1"],"weaknesses":["CWE-284"],"ingestedAt":"2026-10-29T20:12:32.778Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/61xxx/CVE-2026-61610.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-61610","state":"PUBLISHED","datePublished":"2026-10-15T16:26:16.585Z","dateUpdated":"2026-10-20T02:48:31.094Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-07-10T17:36:04.597Z"},"containers":{"cna":{"title":"Lychee: unauthenticated photo starring reveals existence of private photos when photos_star_visibility=anonymous","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"LycheeOrg","product":"Lychee","versions":[{"version":"< 7.6.1","status":"affected"}]}],"references":[{"url":"https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-qcqq-p4pq-7r77","name":"https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-qcqq-p4pq-7r77","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/LycheeOrg/Lychee/pull/4449","name":"https://github.com/LycheeOrg/Lychee/pull/4449","tags":["x_refsource_MISC"]},{"url":"https://github.com/LycheeOrg/Lychee/commit/fe07567c176bbdcda7b276bb6d664dfcd47a9b00","name":"https://github.com/LycheeOrg/Lychee/commit/fe07567c176bbdcda7b276bb6d664dfcd47a9b00","tags":["x_refsource_MISC"]},{"url":"https://github.com/LycheeOrg/Lychee/releases/tag/v7.6.1","name":"https://github.com/LycheeOrg/Lychee/releases/tag/v7.6.1","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"PRESENT","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":2.3,"baseSeverity":"LOW","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-284","lang":"en","description":"CWE-284: Improper Access Control","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-15T16:26:16.585Z"},"source":{"advisory":"GHSA-qcqq-p4pq-7r77","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-qcqq-p4pq-7r77","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-20T02:48:06.704908Z","id":"CVE-2026-61610","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-20T02:48:31.094Z"}}]}}}