CVE-2026-34458: CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection') in sandboxie-plus Sandboxie
Sandboxie-Plus versions 1. 17. 2 and earlier contain a CRLF injection vulnerability that allows a local user to bypass configuration restrictions and inject arbitrary directives into the global Sandboxie. ini file. This occurs because the background service does not sanitize CRLF characters in IPC messages related to configuration settings. Exploiting this, an attacker can create a new sandbox section with unrestricted permissions, leading to sandbox escape and SYSTEM privilege escalation. The vulnerability is fixed in version 1. 17. 3.
AI Analysis
Technical Summary
CVE-2026-34458 is a critical CRLF injection vulnerability in Sandboxie-Plus (<=1.17.2) where the background service improperly neutralizes CRLF sequences in IPC messages targeting configuration settings. This allows a standard local user to inject arbitrary directives into the global Sandboxie.ini file by exploiting unsanitized value and setting name parameters. The injected configuration can define a new sandbox section with unrestricted permissions, enabling sandbox escape and escalation to SYSTEM privileges. The issue is resolved in version 1.17.3.
Potential Impact
A local attacker with standard user privileges can bypass Sandboxie-Plus configuration restrictions and inject arbitrary configuration directives, resulting in sandbox escape and SYSTEM-level privilege escalation. This compromises the isolation guarantees of Sandboxie-Plus and can lead to full system compromise.
Mitigation Recommendations
Upgrade Sandboxie-Plus to version 1.17.3 or later, where this CRLF injection vulnerability has been fixed. No other mitigations are indicated or required once the update is applied.
CVE-2026-34458: CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection') in sandboxie-plus Sandboxie
Description
Sandboxie-Plus versions 1. 17. 2 and earlier contain a CRLF injection vulnerability that allows a local user to bypass configuration restrictions and inject arbitrary directives into the global Sandboxie. ini file. This occurs because the background service does not sanitize CRLF characters in IPC messages related to configuration settings. Exploiting this, an attacker can create a new sandbox section with unrestricted permissions, leading to sandbox escape and SYSTEM privilege escalation. The vulnerability is fixed in version 1. 17. 3.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-34458 is a critical CRLF injection vulnerability in Sandboxie-Plus (<=1.17.2) where the background service improperly neutralizes CRLF sequences in IPC messages targeting configuration settings. This allows a standard local user to inject arbitrary directives into the global Sandboxie.ini file by exploiting unsanitized value and setting name parameters. The injected configuration can define a new sandbox section with unrestricted permissions, enabling sandbox escape and escalation to SYSTEM privileges. The issue is resolved in version 1.17.3.
Potential Impact
A local attacker with standard user privileges can bypass Sandboxie-Plus configuration restrictions and inject arbitrary configuration directives, resulting in sandbox escape and SYSTEM-level privilege escalation. This compromises the isolation guarantees of Sandboxie-Plus and can lead to full system compromise.
Mitigation Recommendations
Upgrade Sandboxie-Plus to version 1.17.3 or later, where this CRLF injection vulnerability has been fixed. No other mitigations are indicated or required once the update is applied.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-03-27T18:18:14.895Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69fa4dc2cbff5d861021529c
Added to database: 5/5/2026, 8:06:26 PM
Last enriched: 5/5/2026, 8:21:43 PM
Last updated: 5/6/2026, 1:01:17 AM
Views: 6
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