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CVE-2026-57062

Quick assessment

Affected
GnuPG GnuPG
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.

gnupg是gnupg团队开源的一套数据加密与数字签名工具。 GnuPG 2.5.20及之前版本存在输入验证错误漏洞，该漏洞源于CMS格式处理不当，AES-GCM算法中aes-ICVlen应为12字节但接受了4字节。

CVSS 2.9 · Low EPSS 0.15% · P4

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
GnuPG GnuPG ≤ 2.5.20 affected
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I. Basic Information for CVE-2026-57062

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
CMS (Cryptographic Message Syntax) parsing in gpgsm in GnuPG through 2.5.20 mishandles the CMS format for AES-GCM because aes-ICVlen is supposed to be 12 bytes but 4 bytes is accepted. NOTE: this is related to CVE-2026-34182.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1284
Source: CVE Program / CVE List V5
Vulnerability Title
GnuPG 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
gnupg是gnupg团队开源的一套数据加密与数字签名工具。 GnuPG 2.5.20及之前版本存在输入验证错误漏洞，该漏洞源于CMS格式处理不当，AES-GCM算法中aes-ICVlen应为12字节但接受了4字节。
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
GnuPG GnuPG 0 ~ 2.5.20 -

II. Public POCs for CVE-2026-57062

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III. Intelligence Information for CVE-2026-57062

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Security Blog Posts for CVE-2026-57062 (1)

Vendor Pages for CVE-2026-57062 (1)

IV. Related Vulnerabilities

Same product: GnuPG
Same vendor: GnuPG
Same weakness: CWE-1284

V. Comments for CVE-2026-57062

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