CVE-2026-42564: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in fccview jotty
CVE-2026-42564 is a high-severity path traversal vulnerability in jotty, a self-hosted checklist and notes app by fccview. Versions prior to 1.22.0 allow unauthenticated attackers to read arbitrary files outside the intended directory via the /api/app-icons/[filename] endpoint. This occurs because the filename parameter is concatenated into a filesystem path without proper validation to prevent traversal. The vulnerability is fixed in version 1.22.0. No known exploits are reported in the wild.
AI Analysis
Technical Summary
The vulnerability in jotty versions before 1.22.0 involves improper limitation of a pathname to a restricted directory (CWE-22). Specifically, the filename parameter in the /api/app-icons/[filename] route is used directly to construct a filesystem path without sanitization, enabling an attacker to perform path traversal and read files outside the intended data/uploads/app-icons/ directory. This can lead to unauthorized disclosure of sensitive files. The issue is resolved in version 1.22.0.
Potential Impact
Successful exploitation allows unauthenticated attackers to read arbitrary files on the server outside the designated directory, potentially exposing sensitive information. The CVSS v3.1 score is 8.2 (high), reflecting network attack vector, no privileges required, no user interaction, high confidentiality impact, low integrity impact, and no availability impact.
Mitigation Recommendations
Upgrade jotty to version 1.22.0 or later, where this path traversal vulnerability is fixed. Since the vendor advisory confirms the fix in 1.22.0, applying this official update is the recommended remediation. No additional temporary mitigations are indicated.
CVE-2026-42564: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in fccview jotty
Description
CVE-2026-42564 is a high-severity path traversal vulnerability in jotty, a self-hosted checklist and notes app by fccview. Versions prior to 1.22.0 allow unauthenticated attackers to read arbitrary files outside the intended directory via the /api/app-icons/[filename] endpoint. This occurs because the filename parameter is concatenated into a filesystem path without proper validation to prevent traversal. The vulnerability is fixed in version 1.22.0. No known exploits are reported in the wild.
CVSS v3.1
Score 8.2high
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in jotty versions before 1.22.0 involves improper limitation of a pathname to a restricted directory (CWE-22). Specifically, the filename parameter in the /api/app-icons/[filename] route is used directly to construct a filesystem path without sanitization, enabling an attacker to perform path traversal and read files outside the intended data/uploads/app-icons/ directory. This can lead to unauthorized disclosure of sensitive files. The issue is resolved in version 1.22.0.
Potential Impact
Successful exploitation allows unauthenticated attackers to read arbitrary files on the server outside the designated directory, potentially exposing sensitive information. The CVSS v3.1 score is 8.2 (high), reflecting network attack vector, no privileges required, no user interaction, high confidentiality impact, low integrity impact, and no availability impact.
Mitigation Recommendations
Upgrade jotty to version 1.22.0 or later, where this path traversal vulnerability is fixed. Since the vendor advisory confirms the fix in 1.22.0, applying this official update is the recommended remediation. No additional temporary mitigations are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-28T17:26:12.084Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a028746cbff5d86108b50dc
Added to database: 05/12/2026, 01:49:58 UTC
Last enriched: 05/19/2026, 10:53:38 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 80
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