Sylius 2.x before 2.1.16 and 2.2.9 Arbitrary Payment Action via Shop API (CVE-2026-100869) | HOL Guard CVE

High · CVSS 8.2CVE-2026-100869

Sylius 2.x before 2.1.16 and 2.2.9 Arbitrary Payment Action via Shop API

Answer in brief

CVE-2026-100869 records a High severity (CVSS 8.2) vulnerability in Sylius 2.x before 2.1.16 and 2.2.9 Arbitrary Payment Action via Shop API. The current sources do not mark it as known exploited. The current feed maps Sylius/sylius/sylius (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 27, 2026Updated Sep 27, 2026Source checked Sep 27, 2026First seen by HOL Sep 27, 2026Material review Sep 27, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.2
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 8.2. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Sylius/sylius/sylius (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Sylius/sylius/syliusgeneric	>=2.0.0 <2.1.16 \|\| >=2.2.0 <2.2.9	2.1.16, 2.2.9

Recommended response

Check inventory. Check lockfiles and deployed manifests for Sylius/sylius/sylius.
Review the reported fix. Update Sylius/sylius/sylius to 2.1.16 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 27, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 27, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 27, 2026

Sources and claim methodology

Upstream source description

Sylius versions before 2.1.16 and 2.2.9 fail to restrict payment request actions in the Shop API endpoint, allowing customers to trigger refunds on completed orders. Attackers with order tokens can submit arbitrary payment actions like refunds that payment gateways execute while Sylius maintains order as paid, causing financial loss.

Quoted source text, attributed separately from HOL analysis.