sandboxie-plus Sandboxie up to 1.17.2 on Windows Password Hash weak hash

Summaryinfo

A vulnerability identified as problematic has been detected in sandboxie-plus Sandboxie up to 1.17.2 on Windows. This affects an unknown function of the component Password Hash Handler. This manipulation causes weak hash. This vulnerability is tracked as CVE-2026-34527. The attack is restricted to local execution. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability has been found in sandboxie-plus Sandboxie up to 1.17.2 on Windows and classified as problematic. Affected by this vulnerability is some unknown functionality of the component Password Hash Handler. The manipulation with an unknown input leads to a weak hash vulnerability. The CWE definition for the vulnerability is CWE-328. The product uses an algorithm that produces a digest (output value) that does not meet security expectations for a hash function that allows an adversary to reasonably determine the original input (preimage attack), find another input that can produce the same hash (2nd preimage attack), or find multiple inputs that evaluate to the same hash (birthday attack). As an impact it is known to affect confidentiality. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-34527 since 03/30/2026. The exploitation appears to be difficult. An attack has to be approached locally. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1600.001 for this issue.

Upgrading to version 1.17.3 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-27466). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• sandboxie-plus

Name

• Sandboxie

Version

• 1.17.0
• 1.17.1
• 1.17.2

Website

• Product: https://github.com/sandboxie-plus/Sandboxie/

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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