Vulnerability in shopper/framework (CVE-2026-56831)
Summary
Vulnerability in shopper/framework (CVE-2026-56831). Data can be tampered with by attackers. Exploitable via sh_discounts. Mitigation: upgrade to 2.9.0 or later.
Original description
The description as published by the source.
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 not enforce this assumption during creation, storage, or calculation.
As a result, malformed discount records can influence financial calculations and produce unintended order totals.
Affected Product
Package: shopper/framework
Version Tested: 2.8.1
Vulnerability Type
- Business Logic Vulnerability
- Improper Input Validation (CWE-20)
Description
While reviewing the discount functionality, it was discovered that the application accepts negative discount values through the administrative interface.
Example values tested:
-50.00
-99,999,999.00
The application accepted these values without validation and stored them in the database.
Example records observed in the sh_discounts table:
1 | QCZ5Y3HESM | fixed_amount | -5000
4 | TOZKAHCB4S | fixed_amount | -9999999900
This demonstrates that negative discount values are successfully persisted.
Steps to Reproduce
1. Create a Discount
Login as an administrator.
Navigate to:
/cpanel/discounts
Create a new discount with the f…
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-56831 has been found in shopper/framework.
Attackers can target a specific entry point like sh_discounts over the network to misuse the product.
Data can be tampered with by attackers. CVSS score: 6.5/10.
What to do: upgrade shopper/framework to 2.9.0 or later.
If unsure, ask your IT team or search "shopper/framework CVE-2026-56831" on the vendor's site.
CVE-2026-56831 (shopper/framework) — CWE-20 / CVSS v3 6.5
Attack vector: remote (network-reachable) / no user interaction
Attack surface: sh_discounts
Patched: 2.9.0 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-20) exists in shopper/framework. Attackers reach the vulnerable code path via sh_discounts.
Check the vendor advisory for the affected versions of shopper/framework. Attack surface: sh_discounts.
Severity: Medium (CVSS 6.5/10). Data can be tampered with by attackers.
Update to 2.9.0.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'shopper/framework' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'shopper/framework' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
shopper/frameworkを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade shopper/framework to 2.9.0ステージング環境で 2.9.0 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。