CVE-2023-32694: Non-constant time HMAC comparison in Adyen plugin in Saleor

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-05-25 · updated 2026-06-17
Weakness: CWE-203

Description

Saleor Core is a composable, headless commerce API. Saleor's `validate_hmac_signature` function is vulnerable to timing attacks. Malicious users could abuse this vulnerability on Saleor deployments having the Adyen plugin enabled in order to determine the secret key and forge fake events, this could affect the database integrity such as marking an order as paid when it is not. This issue has been patched in versions 3.7.68, 3.8.40, 3.9.49, 3.10.36, 3.11.35, 3.12.25, and 3.13.16.

Affected products

saleor: from 2.11.0 before 3.7.68; from 3.8.0 before 3.8.40; from 3.9.0 before 3.9.49; from 3.10.0 before 3.10.36; from 3.11.0 before 3.11.35; from 3.12.0 before 3.12.25 — fixed in 3.10.36, 3.11.35, 3.12.25, 3.13.16, 3.7.68, 3.8.40

How to fix

Upgrade to a fixed version: saleor 3.10.36, 3.11.35, 3.12.25, 3.13.16. Check the vendor advisory for mitigations.

References

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