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CVE-2026-61611— Lychee: Missing rate limiting on album password unlock endpoint allows brute-force attacks

Quick assessment

Affected
LycheeOrg Lychee
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Lychee 是一款免费、开源的照片管理工具。在 7.6.1 版本之前，POST /api/v2/Album::unlock 接口未实施速率限制（throttle）、尝试计数（attempt counter）、退避策略（backoff）、验证码（CAPTCHA）或账户锁定（lockout）等安全措施。UnlockAlbumRequest::authorize() 方法允许任意调用者提交猜测请求，而 app/Actions/Album/Unlock.php 中使用 Hash::check 对每次猜测进行验证，且未对连

CVSS 7.5 · High

Possible ATT&CK Techniques 1 AI

T1110 · Brute Force

Affected Version Matrix 1

VendorProduct Version RangeStatus
LycheeOrg Lychee < 7.6.1 affected
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I. Basic Information for CVE-2026-61611

Vulnerability Information
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Vulnerability Title
Lychee: Missing rate limiting on album password unlock endpoint allows brute-force attacks
Source: CVE Program / CVE List V5
Vulnerability Description
Lychee is a free, open-source photo-management tool. Prior to 7.6.1, POST /api/v2/Album::unlock has no throttle, attempt counter, backoff, CAPTCHA, or lockout. UnlockAlbumRequest::authorize() permits any caller to submit attempts, and app/Actions/Album/Unlock.php verifies each guess with Hash::check without limiting repeated failures. A remote unauthenticated attacker who knows or can obtain an album identifier can automate password guesses against a password-protected album and, if the password is recovered, gain access to its private photo collection. This issue is fixed in version 7.6.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
过多认证尝试的限制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
LycheeOrg Lychee < 7.6.1 -

II. Public POCs for CVE-2026-61611

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III. Intelligence Information for CVE-2026-61611

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Patches & Fixes for CVE-2026-61611 (2)

Vendor Advisories for CVE-2026-61611 (1)

Vendor Pages for CVE-2026-61611 (1)

Same Patch Batch · LycheeOrg · 2026-10-15 · 10 CVEs total

CVE-2026-62679 8.9 HIGH Lychee: Path traversal in `SecurePathController` allows authenticated arbitrary file read
CVE-2026-77470 8.3 HIGH Lychee: Webshop checkout lets the client override the payment `amount` sent to the gateway
CVE-2026-77466 8.3 HIGH Lychee: Webshop payment bypass via unrestricted "Dummy" gateway selection
CVE-2026-61838 8.2 HIGH Lychee: Album password bypass in ZIP downloads
CVE-2026-77467 7.1 HIGH Lychee: A single 383-byte PDF causes ~184 seconds of CPU consumption in the real processin
CVE-2026-77468 6.9 MEDIUM Lychee: Missing Authentication for Critical Function and Allocation of Resources Without L
CVE-2026-57568 5.7 MEDIUM Lychee: Stored XSS via Markdown javascript: Links in Photo and Album Descriptions (Gallery
CVE-2026-57569 2.3 LOW Lychee: Distinct post-fix SSRF variant in Photo::fromUrl due to missing IP pinning after D
CVE-2026-61610 2.3 LOW Lychee: unauthenticated photo starring reveals existence of private photos when photos_sta

IV. Related Vulnerabilities

Same product: Lychee
Same vendor: LycheeOrg
Same weakness: CWE-307

V. Comments for CVE-2026-61611

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