CVE-2026-77470 Lychee - Broken Access Control

Lychee < 7.7.1 contains a broken access control vulnerability caused by unrestricted additional_data array merging in the webshop checkout process, letting unauthenticated buyers manipulate payment parameters to underpay, exploit requires enabled webshop, purchasable item, and affected Omnipay gateway.

CVSS base score 8.3 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Broken Access Control
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/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
Published
15 October 2026
Updated
16 October 2026
Weakness
CWE-20

Vendor fix

Update to version 7.7.1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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