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Vulnerability record · CVE-2025-69871 · published 11 February 2026

CVE-2025-69871: Race condition vulnerability

A race condition vulnerability exists in MedusaJS Medusa v2.12.2 and earlier in the registerUsage() function of the promotion module. The function performs a non-atomic read-check-update operation when enforcing promotion usage limits. This allows unauthenticated remote attackers to bypass usage limits by sending concurrent checkout requests, resulting in unlimited redemptions of limited-use promotional codes and potential financial loss.

8.1 CVSS 3.1 High EPSS 0.36% · top 73.1% CWE-362 · Race condition Deferred
8.1CVSS 3.1 base score
0.36%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
17 Jun 2026Last modified by NVD

Description

A race condition vulnerability exists in MedusaJS Medusa v2.12.2 and earlier in the registerUsage() function of the promotion module. The function performs a non-atomic read-check-update operation when enforcing promotion usage limits. This allows unauthenticated remote attackers to bypass usage limits by sending concurrent checkout requests, resulting in unlimited redemptions of limited-use promotional codes and potential financial loss.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References

LinkTags
https://github.com/EthanKim88/ethan-cve-disclosures/blob/main/CVE-2025-69871-MedusaJS-TOCTOU.md
https://github.com/medusajs/medusa
https://github.com/medusajs/medusa/pull/13760

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Source: NIST National Vulnerability Database (record CVE-2025-69871), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.