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CVE-2026-56968

Quick assessment

Affected
GNU GNU SASL
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.

GNU SASL是美国GNU基金会开源的一个简单身份验证和安全层 (SASL) 框架和一些常见 SASL 机制的实现。 GNU SASL 2.2.4之前版本存在输入验证错误漏洞，该漏洞源于在_gsasl_ntlm_client_step函数中缺少对短挑战的清理，可能导致通过特制服务器造成内存泄露。

CVSS 3.7 · Low EPSS 0.41% · P33

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 1

VendorProduct Version RangeStatus
GNU GNU SASL < 2.2.4 affected
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I. Basic Information for CVE-2026-56968

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
GNU SASL before 2.2.4 lacks sanitization of a short challenge in _gsasl_ntlm_client_step in the NTLM client, which could result in memory disclosure via a crafted server.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
未进行最小值检查的数值范围比较
Source: CVE Program / CVE List V5
Vulnerability Title
GNU SASL 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GNU SASL是美国GNU基金会开源的一个简单身份验证和安全层 (SASL) 框架和一些常见 SASL 机制的实现。 GNU SASL 2.2.4之前版本存在输入验证错误漏洞，该漏洞源于在_gsasl_ntlm_client_step函数中缺少对短挑战的清理，可能导致通过特制服务器造成内存泄露。
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
GNU GNU SASL 0 ~ 2.2.4 -

II. Public POCs for CVE-2026-56968

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III. Intelligence Information for CVE-2026-56968

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Mailing List Discussions for CVE-2026-56968 (2)

Vendor Pages for CVE-2026-56968 (2)

IV. Related Vulnerabilities

Same product: GNU SASL
Same vendor: GNU
Same weakness: CWE-839

V. Comments for CVE-2026-56968

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