Improper Validation of Integrity Check Value Affecting openssl package, versions [3.0.5,]
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.
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Test your applications- Snyk IDSNYK-CONAN-OPENSSL-17277324
- published10 Jun 2026
- disclosed9 Jun 2026
- creditAsim Viladi Oglu Manizada,Alex Gaynor,Ying Dong,Haiyang Huang
Introduced: 9 Jun 2026
NewCVE-2026-34182 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
Affected versions of this package are vulnerable to Improper Validation of Integrity Check Value when processing cipher and tag-length fields of CMS AuthEnvelopedData containers. An attacker can bypass message integrity via replay attack. A non AEAD cipher is permitted in AuthEnvelopedData, so an attacker who can capture a legitimate AES-GCM message can replay it with the recipientInfos. Additionally, the attacker can reduce the AEAD tag length to a single byte, enabling brute-force forgery for applications that employ CMS_decrypt() to reject modified content.