OpenSSL Encrypt Vulnerability in PublicKeyBundle from Unverified Data by Vendor
CVE-2026-74876

9.3CRITICAL

Key Information:

Vendor

Jahlives

Status
OpenSSL Encrypt
Vendor
CVE Published:
17 August 2026

What is CVE-2026-74876?

The openssl_encrypt library prior to version 1.4.0 is susceptible to a security flaw in the PublicKeyBundle.from_dict() function, which allows for the creation of key bundles from untrusted input without proper signature verification. This oversight enables attackers to utilize their public keys to encrypt sensitive information, leading to potential leakage of confidential data. It is crucial for users and developers to upgrade to the latest version to mitigate these risks.

Affected Version(s)

openssl_encrypt 0 < 1.4.0

openssl_encrypt 1.4.0

References

https://github.com/jahlives/openssl_encrypt/security/advi...
vendor-advisory
https://www.vulncheck.com/advisories/openssl-encrypt-befo...
third-party-advisory

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.