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TI-2026-74842 Aliases CVE-2026-61611

Missing rate limiting in Lychee album unlock allows password guessing

Priority HIGH 72CWE-307Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-307.

Summary

Lychee before 7.6.1 has no rate limiting, attempt counter, or lockout on its album password unlock endpoint. The password check does not limit repeated failed attempts, which is classified as CWE-307. A remote unauthenticated attacker who knows or can obtain an album identifier can automate password guesses and, if a password is recovered, access the album's private photos.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00454 39th percentileScored 2026-11-07
Fix Fixed Lychee (LycheeOrg): 7.6.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LycheeOrgLycheebefore 7.6.17.6.1Patch availableCNA
  • Lychee VendorLycheeOrg Affected before 7.6.1 Fixed in 7.6.1 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:lycheeorg:lychee:*:*:*:*:*:*:*:*——LycheeOrg
  • cpe:2.3:a:lycheeorg:lychee:*:*:*:*:*:*:*:* Versions — — ·LycheeOrg

Remediation

Upgrade Lychee to version 7.6.1, which fixes this issue.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA Lychee (LycheeOrg) Fixed in 7.6.1

Timeline

  1. 2026-10-16 Threatist record created from CVE-2026-61611
  2. 2026-10-16 Priority changed: MEDIUM → LOW
  3. 2026-10-29 CISA SSVC decision points changed
  4. 2026-10-29 Priority changed: LOW → HIGH

References

Other 4

  • TI-2026-74843 Album password bypass in Lychee ZIP downloads CVSS 4.0HIGH 8.2
  • TI-2024-16953 Cross-site Request Forgery (CSRF) vulnerability in Lychee version 3.1.6, allows remote… CVSS 3.1HIGH 8.3
  • TI-2026-74848 Lychee webshop checkout lets buyers override payment amount CVSS 4.0HIGH 8.3
  • TI-2026-74845 Payment bypass in Lychee webshop through unrestricted Dummy gateway CVSS 4.0HIGH 8.3
  • TI-2026-74846 Uncontrolled resource consumption in Lychee PDF processing CVSS 4.0HIGH 7.1
  • TI-2024-16952 Cross Site Scripting (XSS) vulnerability in Lychee 3.1.6, allows remote attackers to… CVSS 3.1MEDIUM 6.1
See all 20 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences