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CVE-2026-34527— Sandboxie-Plus EditPassword hash entropy reduced from 160 bits to 80 bits due to incorrect nibble extraction

AI Predicted 5.3 Difficulty: Easy EPSS 0.01% · P2

Possible ATT&CK Techniques 1AI

T1552.004 · Private Keys

Affected Version Matrix 1

VendorProductVersion RangeStatus
sandboxie-plusSandboxie< 1.17.3affected
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I. Basic Information for CVE-2026-34527

Vulnerability Information
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Vulnerability Title
Sandboxie-Plus EditPassword hash entropy reduced from 160 bits to 80 bits due to incorrect nibble extraction
Source: NVD (National Vulnerability Database)
Vulnerability Description
Sandboxie-Plus is an open source sandbox-based isolation software for Windows. In versions 1.17.2 and earlier, SbieIniServer::HashPassword converts a SHA-1 digest to hexadecimal incorrectly. The high nibble of each byte is shifted right by 8 instead of 4, which always produces zero for an 8-bit value. As a result, the stored EditPassword hash only preserves the low nibble of each digest byte, reducing the effective entropy from 160 bits to 80 bits. This is layered on top of an unsalted SHA-1 scheme. The reduced entropy makes leaked or backed-up password hashes materially easier to brute-force. This issue has been fixed in version 1.17.3.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
可逆的单向哈希
Source: NVD (National Vulnerability Database)
Vulnerability Title
Sandboxie-Plus 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Sandboxie-Plus是Sandboxie-Plus公司的一款沙盒隔离软件。 Sandboxie-Plus 1.17.2及之前版本存在安全漏洞，该漏洞源于HashPassword函数将SHA-1摘要转换为十六进制时错误地将高半字节右移8位而非4位，导致有效熵从160位降至80位，使得密码哈希更容易被暴力破解。
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

VendorProductAffected VersionsCPESubscribe
sandboxie-plusSandboxie < 1.17.3 -

II. Public POCs for CVE-2026-34527

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III. Intelligence Information for CVE-2026-34527

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Advisory · 1

Same Patch Batch · sandboxie-plus · 2026-05-05 · 8 CVEs total

CVE-2026-32603Sandboxie kernel driver denial of service via malformed IOCTL from sandboxed process
CVE-2026-34596Sandboxie-Plus local privilege escalation via TOCTOU race condition in UpdUtil addon insta
CVE-2026-34462Sandboxie-Plus ProcessServer boxname stack buffer overflows via unterminated wide string c
CVE-2026-34458Sandboxie-Plus privilege escalation via INI CRLF injection bypassing EditAdminOnly
CVE-2026-34459Sandboxie-Plus sandbox escape via uninitialized memory leak and stack overflow in GetRawIn
CVE-2026-34464Sandboxie-Plus NamedPipeServer OpenHandler stack overflow via unterminated server field
CVE-2026-34461Sandboxie-Plus SbieIniServer RunSbieCtrl stack buffer overflow allows local privilege esca

IV. Related Vulnerabilities

Same product: Sandboxie
Same vendor: sandboxie-plus
Same weakness: CWE-328

V. Comments for CVE-2026-34527

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