CVE-2026-77470

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Source
https://cve.org/CVERecord?id=CVE-2026-77470
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-77470.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-77470
Aliases
  • GHSA-476v-jr53-8rxc
Published
2026-10-15T16:36:09Z
Modified
2026-10-16T10:31:12Z
Severity
  • 8.3 (High) CVSS_V4 - 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 CVSS Calculator
Summary
Lychee: Webshop checkout lets the client override the payment `amount` sent to the gateway via malicious crafted POST request
Details

Lychee is a free, open-source photo-management tool. Prior to 7.7.1, the Supporter or Pro webshop POST /api/v2/Shop/Checkout/Process flow accepts an unrestricted additional_data array and CheckoutService::preparePurchaseParameters() merges it after server-computed purchase parameters. Because later string keys overwrite earlier keys, an unauthenticated buyer can replace amount, currency, returnUrl, cancelUrl, or transactionId before CheckoutService::processPayment() passes the parameters to a non-PayPal Omnipay gateway. An attacker can therefore make a gateway accept a successful payment for an attacker-selected amount and obtain auto-fulfilled goods while underpaying the merchant. The issue requires an enabled webshop, a purchasable item, and an affected Omnipay gateway. This issue is fixed in version 7.7.1.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-20",
        "CWE-472",
        "CWE-915"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77470.json"
}
References

Affected packages

Git / github.com/lycheeorg/lychee

Affected ranges

Type
GIT
Repo
https://github.com/lycheeorg/lychee
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
24e6e11f1da131ed20b192d7d7b7ca9084451a2f
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "7.7.1"
        }
    ],
    "source":  "AFFECTED_FIELD"
}

Affected versions

v4.*
v4.0.0
v4.0.0-alpha.1
v4.0.0-beta.1
v4.0.0-beta.2
v4.0.1
v4.0.2
v4.0.3
v4.0.4
v4.0.5
v4.0.6
v4.0.7
v4.0.8
v4.1.0
v4.10.0
v4.11.0
v4.11.1
v4.12.0
v4.13.0
v4.2.0
v4.2.1
v4.2.2
v4.3.0
v4.3.4
v4.3.5
v4.3.6
v4.4.0
v4.5.0
v4.5.1
v4.5.2
v4.5.3
v4.6.0
v4.6.0-RC
v4.6.0-RC2
v4.6.0-RC3
v4.6.1
v4.6.1-RC1
v4.6.1-RC2
v4.6.2
v4.6.2-RC1
v4.6.2-RC2
v4.6.3-RC1
v4.6.4
v4.6.5
v4.7.0
v4.7.1
v4.7.2
v4.7.3
v4.7.4
v4.8.0
v4.8.1
v4.9.0
v4.9.1
v4.9.2
v4.9.3
v4.9.3-RC
v4.9.4
v5.*
v5.0.0
v5.0.0-beta
v5.0.1
v5.0.2
v5.0.3
v5.1.0
v5.1.1
v5.1.2
v5.2.0
v5.2.1
v5.2.2
v5.3.0
v5.3.1
v5.4.0
v5.5.0
v5.5.1
v6.*
v6.0.0
v6.0.1
v6.1.0
v6.1.1
v6.1.2
v6.10.0
v6.10.1
v6.10.2
v6.10.3
v6.10.4
v6.2.0
v6.3.0
v6.3.1
v6.3.2
v6.3.3
v6.3.4
v6.3.5
v6.4.0
v6.4.1
v6.4.2
v6.5.0
v6.5.1
v6.5.2
v6.5.3
v6.6.0
v6.6.1
v6.6.10
v6.6.11
v6.6.12
v6.6.13
v6.6.14
v6.6.2
v6.6.3
v6.6.4
v6.6.5
v6.6.6
v6.6.7
v6.6.8
v6.6.9
v6.7.0
v6.7.1
v6.7.2
v6.8.0
v6.8.1
v6.9.0
v6.9.1
v6.9.2
v6.9.3
v6.9.4
v7.*
v7.0.0
v7.0.1
v7.1.0
v7.1.1
v7.1.2
v7.2.0
v7.2.1
v7.3.0
v7.3.1
v7.3.2
v7.3.3
v7.4.0
v7.4.1
v7.4.2
v7.5.0
v7.5.1
v7.5.2
v7.5.3
v7.5.4
v7.6.0
v7.6.1
v7.6.2
v7.6.3
v7.6.4
v7.7.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-77470.json"