CVE-2026-31821 json
Sylius is Missing Authorization in API v2 Add Item Endpoint
published 7mo ago modified 4mo ago also EUVD-2026-10914 , GHSA-wjmg-4cq5-m8hg
- cvss
- 5.3
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 11%
- public exploits
- 0
- none known
Summary
Sylius is an Open Source eCommerce Framework on Symfony. The POST /api/v2/shop/orders/{tokenValue}/items endpoint does not verify cart ownership. An unauthenticated attacker can add items to other registered customers' carts by knowing the cart tokenValue. An attacker who obtains a cart tokenValue can add arbitrary items to another customer's cart. The endpoint returns the full cart representation in the response (HTTP 201). The issue is fixed in versions: 2.0.16, 2.1.12, 2.2.3 and above.
Patch / fix
- packagist sylius/sylius 2.0.16, 2.1.12, 2.2.3
- sylius sylius 2.0.16, 2.1.12, 2.2.3
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Check with FencerCISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 7mo ago
Exploit prediction
0.21% chance of exploitation in the next 30 days, higher than 11% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.9 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N |
| CNA | 4.0 | 6.9 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | sylius/sylius | >=2.0.0, <2.0.16 >=2.1.0, <2.1.12 >=2.2.0, <2.2.3 |
2.0.16 2.1.12 2.2.3 |
Affected products
- Sylius Sylius
Classification
- Weakness
-
- CWE-862 Missing Authorization
References
-
github.com
/Sylius/Sylius/security/advisories/GHSA-wjmg-4cq5-m8hg
web, mitigation, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-31821
advisory
-
github.com
/Sylius/Sylius
package
Sources
- CVE List CVE-2026-31821
- GitHub Advisory GHSA-wjmg-4cq5-m8hg
- NVD CVE-2026-31821
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.