CVE-2026-61610
LOW 2.3Lychee 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.
No known exploitation, public exploit, or elevated probability at this time. Track for changes.
Exploitation likelihood
0.3%chance of exploitation in 30 days · 23rd percentile
Impact if exploited
2.3CVSS 4.0 · LOW
- ConfidentialityNone
- IntegrityLow
- AvailabilityNone
What an attacker needs
- ✓Access: Reachable over the network — no local access needed
- ⚠Privileges: Requires a low-privilege account
- ✓User interaction: No user interaction needed
- ⚠Complexity: Needs a race window or specific setup
- ⚠Requirements: Specific conditions must be present
✓ lowers the bar for an attacker · ⚠ raises it
Proof of concept
No public PoC is currently catalogued.
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Data snapshot:
Weakness (CWE)
- CWE-284: : Improper Access Control
CVSS 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
References and research data (JSON)
All CVSS metrics
- LOW 2.3 v4.0 · CNA Primary
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 - LOW 2.3 v4.0 · NVD Secondary
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
References
Exploit-tagged references (not proof of a PoC)
- https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-qcqq-p4pq-7r77 CVE record · GitHub_M · Updated 2026-10-15T16:26:16.585Z
CVE record · CISA-ADP · Updated 2026-10-20T02:48:31.094Z
NVD · CVE-2026-61610 · Updated 2026-10-20T03:17:16.427
Advisories
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-102190 EUVD · EUVD-2026-102190
Technical & other
- https://github.com/LycheeOrg/Lychee/pull/4449 CVE record · GitHub_M · Updated 2026-10-15T16:26:16.585Z
NVD · CVE-2026-61610 · Updated 2026-10-20T03:17:16.427 - https://github.com/LycheeOrg/Lychee/commit/fe07567c176bbdcda7b276bb6d664dfcd47a9b00 CVE record · GitHub_M · Updated 2026-10-15T16:26:16.585Z
NVD · CVE-2026-61610 · Updated 2026-10-20T03:17:16.427 - https://github.com/LycheeOrg/Lychee/releases/tag/v7.6.1 CVE record · GitHub_M · Updated 2026-10-15T16:26:16.585Z
NVD · CVE-2026-61610 · Updated 2026-10-20T03:17:16.427