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CVE-2026-41565— CryptX versions before 0.088_001 for Perl have a stack buffer overflow in four AEAD decrypt_verify helpers

Quick assessment

Affected
MIK CryptX
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.

CryptX是DCIT, a.s.开源的一款基于多种加密算法的密码学工具包。 CryptX 0.088_001之前版本存在安全漏洞，该漏洞源于四个AEAD解密验证函数中存在栈缓冲区溢出，可能导致攻击者利用长认证标签触发溢出。

AI Predicted 8.1 Difficulty: Easy EPSS 0.80% · P55

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
MIK CryptX < 0.088_001 affected
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I. Basic Information for CVE-2026-41565

Vulnerability Information
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Vulnerability Title
CryptX versions before 0.088_001 for Perl have a stack buffer overflow in four AEAD decrypt_verify helpers
Source: CVE Program / CVE List V5
Vulnerability Description
CryptX versions before 0.088_001 for Perl have a stack buffer overflow in four AEAD decrypt_verify helpers. The gcm_decrypt_verify, ccm_decrypt_verify, chacha20poly1305_decrypt_verify and eax_decrypt_verify XS routines copied the caller-supplied authentication tag into a fixed 144-byte stack buffer (MAXBLOCKSIZE) without checking the supplied length. A longer tag overwrites the stack past the buffer. Version 0.088 added the clamp to gcm_decrypt_verify, and 0.088_001 added it to the other three. Any caller of an affected helper that forwards an attacker-controlled tag longer than the buffer can trigger the overflow.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
CryptX 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CryptX是DCIT, a.s.开源的一款基于多种加密算法的密码学工具包。 CryptX 0.088_001之前版本存在安全漏洞，该漏洞源于四个AEAD解密验证函数中存在栈缓冲区溢出，可能导致攻击者利用长认证标签触发溢出。
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
MIK CryptX 0 ~ 0.088_001 -

II. Public POCs for CVE-2026-41565

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III. Intelligence Information for CVE-2026-41565

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Patches & Fixes for CVE-2026-41565 (1)

Vendor Pages for CVE-2026-41565 (1)

IV. Related Vulnerabilities

Same product: CryptX
Same vendor: MIK
Same weakness: CWE-121

V. Comments for CVE-2026-41565

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