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10.0 Critical

Wanderer is a self-hosted trail database for saving and sharing adventures.

CVE-2026-71495

Wanderer is a self-hosted trail database for saving and sharing adventures. Prior to 0.20.0, when PUBLICPRIVATEINSTANCE is not set to true, the unauthenticated POST /api/v1/trail/download handler passes the attacker-controlled JSON url field directly to event.fetch() and returns the fetched response. This allows requests to internal services such as db:8090 and search:7700, cloud metadata addresses, and other network destinations, exposing returned data and permitting internal network reconnaissance or denial of service. This issue is fixed in version 0.20.0.

Assessment

CVSS
10 (v3.1)
Severity
Critical
Known exploited
Not listed in CISA KEV
Exploit availability
Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published
6 November 2026
Last updated
6 November 2026
Assigner
GitHub_M

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:H

At the source

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