CVE-2026-57496 - NetLicensing MCP Server: REST Path Traversal Bypasses Token Redaction

CVE-2026-57496 - NetLicensing MCP Server: REST Path Traversal Bypasses Token Redaction

https://cvefeed.io/rssfeed/latest.atom / Thu, 10/15/2026 - 22:52
CVE ID :CVE-2026-57496
Published : Oct. 15, 2026, 7:17 p.m. | 31 minutes ago
Description :NetLicensing MCP Server is a natural-language interface that enables agentic applications to manage the software-licensing lifecycle in Labs64 NetLicensing. Prior to 0.1.8, netlicensing_get_product passes the caller-controlled product_number to src/netlicensing_mcp/tools/products.py, which interpolates it into a REST path consumed by nl_get() in src/netlicensing_mcp/client.py without path-segment validation. A traversal segment can be normalized from the intended product path to the /token endpoint, after which the response is serialized through _wrap_json instead of _wrap_json_token_read, bypassing redact_token_read() protections for APIKEY number and SHOP shopURL fields. An authenticated MCP client with a non-administrative API key can retrieve plaintext token values, and a recovered administrative token can provide broad read, write, and delete access to the NetLicensing account. This issue is fixed in version 0.1.8.
Severity: 9.6 | CRITICAL
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