CVE-2026-86538: CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in knowns-dev knowns
knowns versions before 0.30.0 have a path traversal vulnerability in the POST /api/templates/preview endpoint. This flaw allows unauthenticated attackers to read arbitrary files by supplying directory traversal sequences in the templateFile parameter, potentially exposing sensitive information such as credentials and configuration files.
AI Analysis
Technical Summary
CVE-2026-86538 is a path traversal vulnerability (CWE-22) affecting knowns versions prior to 0.30.0. The vulnerability exists in the POST /api/templates/preview endpoint, where the templateFile parameter does not properly restrict pathname inputs. This allows unauthenticated attackers to bypass directory restrictions and read arbitrary files on the server, which may include sensitive data. The vulnerability has a CVSS 4.0 score of 8.7, indicating high severity. There is no vendor advisory or patch information currently available, and no known exploits in the wild have been reported.
Potential Impact
An attacker can read arbitrary files on the affected system without authentication by exploiting the path traversal vulnerability. This can lead to disclosure of sensitive information such as credentials and configuration files, potentially compromising system confidentiality.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to the affected endpoint and monitor for suspicious activity related to directory traversal attempts.
CVE-2026-86538: CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in knowns-dev knowns
Description
knowns versions before 0.30.0 have a path traversal vulnerability in the POST /api/templates/preview endpoint. This flaw allows unauthenticated attackers to read arbitrary files by supplying directory traversal sequences in the templateFile parameter, potentially exposing sensitive information such as credentials and configuration files.
CVSS v4.0
Score 8.7high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-86538 is a path traversal vulnerability (CWE-22) affecting knowns versions prior to 0.30.0. The vulnerability exists in the POST /api/templates/preview endpoint, where the templateFile parameter does not properly restrict pathname inputs. This allows unauthenticated attackers to bypass directory restrictions and read arbitrary files on the server, which may include sensitive data. The vulnerability has a CVSS 4.0 score of 8.7, indicating high severity. There is no vendor advisory or patch information currently available, and no known exploits in the wild have been reported.
Potential Impact
An attacker can read arbitrary files on the affected system without authentication by exploiting the path traversal vulnerability. This can lead to disclosure of sensitive information such as credentials and configuration files, potentially compromising system confidentiality.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to the affected endpoint and monitor for suspicious activity related to directory traversal attempts.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-07T22:18:47.017Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a9f43bfacd9273b497857d3
Added to database: 09/07/2026, 23:07:43 UTC
Last enriched: 09/07/2026, 23:22:29 UTC
Last updated: 09/08/2026, 01:26:42 UTC
Views: 7
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