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CVE-2026-74890— openssl_encrypt before 1.4.0 HMAC Authentication Bypass via Environment Variable

Quick assessment

Affected
jahlives openssl_encrypt
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Tobi OpenSSL Encrypt是Tobi个人开发者的一款基于 Python 的文件加密工具。 Tobi OpenSSL Encrypt 1.4.0之前版本存在输入验证错误漏洞，该漏洞源于CamelliaCipher在设置PYTEST_CURRENT_TEST环境变量时禁用HMAC标签生成和验证，可能导致攻击者产生未认证的密文并绕过加密数据的完整性保护。

CVSS 5.5 · Medium EPSS 0.21% · P11

Possible ATT&CK Techniques 2 AI

T1055 · Process Injection T1562

Affected Version Matrix 2

VendorProduct Version RangeStatus
jahlives openssl_encrypt < 1.4.0 affected
1.4.0 unaffected
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I. Basic Information for CVE-2026-74890

Vulnerability Information
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Vulnerability Title
openssl_encrypt before 1.4.0 HMAC Authentication Bypass via Environment Variable
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对数据真实性的验证不充分
Source: CVE Program / CVE List V5
Vulnerability Title
Tobi OpenSSL Encrypt 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tobi OpenSSL Encrypt是Tobi个人开发者的一款基于 Python 的文件加密工具。 Tobi OpenSSL Encrypt 1.4.0之前版本存在输入验证错误漏洞，该漏洞源于CamelliaCipher在设置PYTEST_CURRENT_TEST环境变量时禁用HMAC标签生成和验证，可能导致攻击者产生未认证的密文并绕过加密数据的完整性保护。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
jahlives openssl_encrypt 0 ~ 1.4.0 -

II. Public POCs for CVE-2026-74890

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III. Intelligence Information for CVE-2026-74890

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Vendor Advisories for CVE-2026-74890 (2)

Same Patch Batch · jahlives · 2026-08-17 · 30 CVEs total

CVE-2026-74878 9.8 CRITICAL openssl_encrypt before 1.4.0 TOTP Rate Limiter Bypass
CVE-2026-74901 9.8 CRITICAL openssl_encrypt before 1.4.0 Authentication Bypass via AES-CTR Fallback
CVE-2026-74900 9.8 CRITICAL openssl_encrypt before 1.4.0 Weak Shared Secret via PQC Simulation Mode
CVE-2026-74889 9.8 CRITICAL openssl_encrypt before 1.4.0 Weak Key Derivation via HKDF
CVE-2026-74880 9.8 CRITICAL openssl_encrypt before 1.4.0 Token Leakage via Query Parameters
CVE-2026-74894 9.8 CRITICAL openssl_encrypt before 1.4.0 Authentication Bypass via Bearer Token
CVE-2026-74876 9.8 CRITICAL openssl_encrypt before 1.4.0 Unverified Key Bundle Encryption
CVE-2026-74896 9.8 CRITICAL openssl_encrypt before 1.4.0 Sandbox Escape via Dunder Attribute Traversal
CVE-2026-74875 9.8 CRITICAL openssl_encrypt before 1.4.0 Schema Validation Bypass
CVE-2026-74891 9.8 CRITICAL openssl_encrypt before 1.4.0 Hardcoded Database Credentials
CVE-2026-74895 9.8 CRITICAL openssl_encrypt before 1.4.0 Plugin Sandbox Bypass via Process Isolation
CVE-2026-74872 9.8 CRITICAL openssl_encrypt before 1.4.0 Arbitrary Code Execution via Whirlpool
CVE-2026-74899 9.8 CRITICAL openssl_encrypt before 1.4.0 Sandbox Escape via Type Hierarchy
CVE-2026-74886 9.8 CRITICAL openssl_encrypt before 1.4.0 Plugin Import Guard Bypass
CVE-2026-74893 8.8 HIGH openssl_encrypt before 1.4.0 JWT Token Forgery via Hardcoded Secrets
CVE-2026-74877 8.8 HIGH openssl_encrypt before 1.4.0 Missing Ownership Verification via revoke_key
CVE-2026-74883 8.8 HIGH openssl_encrypt before 1.4.0 Sandbox Bypass via pathlib and io
CVE-2026-74884 7.5 HIGH openssl_encrypt before 1.4.0 Path Traversal via plugin_id
CVE-2026-74879 7.5 HIGH openssl_encrypt before 1.4.0 Information Disclosure via /ready endpoint
CVE-2026-74882 7.5 HIGH openssl_encrypt before 1.4.0 Insecure Default Configuration

Showing top 20 of 30 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: openssl_encrypt
Same vendor: jahlives
Same weakness: CWE-345

V. Comments for CVE-2026-74890

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