Shopper: Negative discount values accepted and propagated through order calculation pipeline — GHSA-5VF4-452P-JJHF

Summary

## Summary The Shopper Framework discount management functionality accepts negative discount values without server-side validation. It was confirmed that negative fixed-amount discounts can be created through the administrative interface, persisted to the database, and subsequently processed by the cart/order calculation pipeline. The application appears to assume that discount values are always positive but does…

Timeline

Published by source

2026-09-11

Risk context

• Reported severity or threat level: medium.
• Reported CVSS score: 6.5 out of 10.
• Review exposure for the affected product or family: composer: shopper/framework.

Product

composer: shopper/framework

What to do

General, cautious steps (verify details in the official source):

• Review exposure and plan remediation based on risk and environment.
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source
• CVE Record
• NVD

Evidence and provenance

Canonical advisory ID

GHSA-5VF4-452P-JJHF

Source

GitHub

Vendor

GitHub

Published by source

2026-09-11

Last source activity

2026-09-11

Additional identifiers

CVE-2026-56831

Curated by

hlukh.ch

Related advisories and connections

These advisories are connected by shared CVE, product, vendor, source, or time signals.