Adyen has utility methods for validating notification HMAC signatures. The is_valid_hmac and is_valid_hmac_notification methods are vulnerable to a timing attack, you should compare the hash of the HM
Adyen has utility methods for validating notification HMAC signatures. The is_valid_hmac and is_valid_hmac_notification methods are vulnerable to a timing attack, you should compare the hash of the HMACs instead.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | adyen | >= 2.2.0, < 7.1.0 | 7.1.0 |
References
- Weakness (CWE)
-- Platform
- Python (PyPI)
- Package
adyen- Disclosed
- 24.01.2023
- Updated
- 11.10.2026 11:18
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2023-1 - PyPA Advisory Database; CC BY 4.0
Vulnerability history: adyen
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 01.2023 08.2024
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Medium 1
- Unrated 1
Disclosures per year
- 2023: 1
- 2024: 1
- 2025: 0
- 2026: 0
-
Adyen has utility methods for validating notification HMAC signatures. The is_valid_hmac and is_valid_hmac_notification methods are vulnerable to a timing attack, you should compare the hash of the HM this entry
Know which vulnerabilities affect your application
With the DockRay integration and software inventory enabled, DockRay checks reported component versions against known vulnerabilities and notifies you about confirmed matches. Coverage depends on the supported technology and available advisory data.