Cart manipulation and disclosure via missing ownership check
Published Mar 10, 2026 · Updated Mar 10, 2026
Missing authorization in Sylius affected 2.x branches allows remote attackers with a cart token to alter and read another customer’s cart. The AddItemToCartHandler resolves tokenValue to a cart and adds a chosen variant without comparing the current user with the cart owner. Knowledge of another registered customer’s cart token is required; a successful POST changes that cart and returns its full representation, including customer and checkout data.
Summary
What happened
Missing authorization in Sylius affected 2.x branches allows remote attackers with a cart token to alter and read another customer’s cart. The AddItemToCartHandler resolves tokenValue to a cart and adds a chosen variant without comparing the current user with the cart owner. Knowledge of another registered customer’s cart token is required; a successful POST changes that cart and returns its full representation, including customer and checkout data.
The record
- CVE
- CVE-2026-31821
- Published
- Mar 10, 2026
- Updated
- Mar 10, 2026
- Vendor
- Sylius
- Product
- Sylius
- Classifications
- CWE-862
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 10, 2026CVE publishedPublication date reported by the CVE source.
- Mar 10, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=>= 2.0.0, < 2.0.16
- Affected versionversion=>= 2.1.0, < 2.1.12
- Affected versionversion=>= 2.2.0, < 2.2.3
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- GitHub advisory reproduction detailsproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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