CVE-2026-56831

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Source
https://cve.org/CVERecord?id=CVE-2026-56831
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-56831.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-56831
Aliases
Published
2026-09-15T17:42:09Z
Modified
2026-10-28T02:30:42Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
Summary
Shopper: Negative discount values accepted and propagated through order calculation pipeline
Details

Shopper is a Headless e-commerce Admin Panel. Prior to 2.9.0, the /cpanel/discounts administrative interface accepts negative fixed_amount discount values, persists them in sh_discounts, and passes them through vendor/shopper/cart/src/Discounts/DiscountCalculator.php and vendor/shopper/cart/src/Pipelines/Calculate.php without enforcing a positive-value invariant. Because the calculation subtracts discountTotal from the subtotal, a negative discount increases the resulting order total instead of reducing it. Malformed discount records can therefore cause incorrect pricing and financial data integrity failures, although the advisory does not establish a customer-facing exploitation path. This issue is fixed in version 2.9.0.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-20"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56831.json"
}
References

Affected packages

Git / github.com/shopperlabs/shopper

Affected ranges

Type
GIT
Repo
https://github.com/shopperlabs/shopper
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
967e616281ded1a0050d9102858ecd7dd7f66a41
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "2.9.0"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "range":  [
                {
                    "fixed":  "967e616281ded1a0050d9102858ecd7dd7f66a41"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "original_tag":  "v2.9.0",
            "range":  [
                {
                    "fixed":  "967e616281ded1a0050d9102858ecd7dd7f66a41"
                }
            ],
            "source":  "REFERENCES_TAG"
        },
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "2.9.0"
                }
            ],
            "source":  "DESCRIPTION"
        }
    ]
}

Affected versions

V1.*
V1.0.4
v0.*
v0.0.1
v0.0.10
v0.0.11
v0.0.12
v0.0.13
v0.0.14
v0.0.15
v0.0.16
v0.0.17
v0.0.18
v0.0.19
v0.0.2
v0.0.20
v0.0.21
v0.0.22
v0.0.23
v0.0.24
v0.0.25
v0.0.26
v0.0.3
v0.0.4
v0.0.5
v0.0.6
v0.0.7
v0.0.8
v0.0.9
v1.*
v1.0
v1.0.1
v1.0.2
v1.0.3
v1.0.4
v1.0.5
v1.0.6
v1.0.7
v1.0.8
v1.0.9
v1.1
v1.1.1
v1.1.2
v2.*
v2.0.0
v2.0.0-beta
v2.0.0-beta10
v2.0.0-beta11
v2.0.0-beta12
v2.0.0-beta13
v2.0.0-beta14
v2.0.0-beta15
v2.0.0-beta16
v2.0.0-beta17
v2.0.0-beta18
v2.0.0-beta19
v2.0.0-beta2
v2.0.0-beta20
v2.0.0-beta21
v2.0.0-beta3
v2.0.0-beta4
v2.0.0-beta5
v2.0.0-beta6
v2.0.0-beta7
v2.0.0-beta8
v2.0.0-beta9
v2.0.1
v2.0.2
v2.0.3
v2.1
v2.1.1
v2.1.2
v2.1.3
v2.1.4
v2.1.5
v2.1.6
v2.2
v2.2.1
v2.2.2
v2.2.3
v2.2.4
v2.2.5
v2.2.6
v2.2.7
v2.3
v2.3.1
v2.3.2
v2.3.3
v2.4.0
v2.4.1
v2.4.2
v2.4.3
v2.5.0
v2.6.0
v2.6.1
v2.6.2
v2.6.3
v2.6.4
v2.7.0
v2.7.1
v2.7.2
v2.7.3
v2.8.0
v2.8.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-56831.json"