SEPTEMBER 19, 2026
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Case File

CVE-2026-74890

MEDIUM · CVSS 5.5 EPSS 0.15% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-08-17 · Last synced 2026-09-16

CyberRota Analysis

AI-Generated

OpenSSL versions prior to 1.4.0 are vulnerable to an authentication bypass in the CamelliaCipher, which allows attackers with code execution to disable HMAC tag generation and verification by manipulating the PYTEST_CURRENT_TEST environment variable. This flaw enables the creation of unauthenticated ciphertext, compromising the integrity of encrypted data. Organizations using affected versions of OpenSSL should prioritize patching to mitigate potential data integrity risks.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
code execution
GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-74890
Severity
MEDIUM
CVSS
5.5
EPSS
0.15%
OpenSSL

Original NVD Description

openssl_encrypt versions before 1.4.0 contain an authentication bypass vulnerability in CamelliaCipher that disables HMAC tag generation and verification when the PYTEST_CURRENT_TEST environment variable is set. Attackers with code execution can set this environment variable to produce unauthenticated ciphertext and bypass integrity protection on encrypted data.

Related CVEs

Other vulnerabilities affecting the same vendor(s)