CVE-2026-74876
Received Received - Intake

OpenSSL Encryption Flaw in PublicKeyBundle.from_dict

Publication date: 2026-08-17

Last updated on: 2026-08-17

Assigner: VulnCheck

Description
openssl_encrypt versions before 1.4.0 contain a vulnerability in PublicKeyBundle.from_dict() that creates key bundles from untrusted data without verifying signatures. Attackers can call from_dict() followed by to_identity() without signature verification to encrypt data using attacker-controlled public keys, leaking secrets.

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Meta Information

Published
2026-08-17
Last Modified
2026-08-17
Generated
2026-08-17
AI Q&A
2026-08-17
EPSS Evaluated
N/A
NVD
CVE-2026-74876
EUVD
EUVD-2026-60095

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
openssl openssl_encrypt to 1.4.0 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-347 The product does not verify, or incorrectly verifies, the cryptographic signature for data.

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Executive Summary

This vulnerability affects openssl_encrypt versions before 1.4.0. The PublicKeyBundle.from_dict() function processes untrusted data without verifying cryptographic signatures. Attackers can exploit this by calling from_dict() followed by to_identity() to encrypt data using attacker-controlled public keys, which may lead to secret leakage.

Detection Guidance

Check the version of openssl_encrypt installed on your system. If it is below 1.4.0, the system is vulnerable. Use commands like 'pip show openssl_encrypt' or 'openssl_encrypt --version' to verify the installed version.

Impact Analysis

Attackers could intercept and decrypt sensitive data if they control the public keys used for encryption. This could expose confidential information such as credentials, personal data, or other secrets transmitted or stored using the vulnerable library.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or health data, violating GDPR and HIPAA requirements for data protection and encryption. Organizations using affected versions may face compliance violations, legal penalties, and reputational damage due to data breaches.

Mitigation Strategies

Immediately upgrade openssl_encrypt to version 1.4.0 or later. If upgrading is not possible, review and modify code to ensure signature verification is performed before using PublicKeyBundle.from_dict() and to_identity().

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