Improper Authentication Affecting com.azure:azure-security-keyvault-keys package, versions [,4.10.6)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsSnyk Learn
Learn about Improper Authentication vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-JAVA-COMAZURE-16779786
- published20 May 2026
- disclosed12 May 2026
- creditsho odagiri
Introduced: 12 May 2026
NewCVE-2026-33117 (opens in a new tab)How to fix?
Upgrade com.azure:azure-security-keyvault-keys to version 4.10.6 or higher.
Overview
Affected versions of this package are vulnerable to Improper Authentication in the AesCbcHmacSha2Decryptor.doFinal() function, which effectively skips authentication by comparing the computed authentication tag with itself rather than with the received tag, for A128CBC-HS256, A192CBC-HS384, and A256CBC-HS512 decryption. This allows attackers to manipulate encrypted data without detection, or expose data by inference when observing responses to encrypted payloads.