CVE-2026-55629
High
Description
Whistle is an HTTP, HTTP2, HTTPS, and WebSocket debugging proxy. Prior to 2.10.3, lib/service/service.js handles GET /cgi-bin/temp/get by reading req.query.filename, joining it to TEMP_FILES_PATH only when it matches the temporary file pattern, and otherwise passing the user-supplied filename directly to getFile, allowing a remote attacker to read arbitrary files such as /etc/passwd. This issue is reported as fixed in version 2.10.3.
SeverityHigh
CVSS8.7
Exploit probability—
ProductWhistle
PublishedJul 16, 2026
First seenJul 16, 2026
Weakness typeCWE-22Path traversal
How to fix
Update
- whistle2.10.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| whistlenpm | v < 2.10.3 | 2.10.3 |
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