ShaneIsrael Fireshare up to 1.6.15 API Endpoint missing authentication

Summaryinfo

A vulnerability categorized as critical has been discovered in ShaneIsrael Fireshare up to 1.6.15. The impacted element is an unknown function of the component API Endpoint. Executing a manipulation can lead to missing authentication. This vulnerability appears as CVE-2026-54544. The attack may be performed from remote. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in ShaneIsrael Fireshare up to 1.6.15. It has been declared as critical. This vulnerability affects an unknown functionality of the component API Endpoint. The manipulation with an unknown input leads to a missing authentication vulnerability. The CWE definition for the vulnerability is CWE-306. The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Fireshare facilitates self-hosted media and link sharing. Prior to version 1.6.16, two API endpoints that trigger outbound HTTP requests are missing the @login_required decorator. An unauthenticated attacker can call POST /api/test-discord-webhook or POST /api/test-webhook and cause the Fireshare server to issue an arbitrary HTTP POST to any URL the attacker supplies, including internal network addresses and cloud metadata services. No credentials, session cookies, or prior access are required. Version 1.6.16 contains a patch.

The advisory is available at github.com. This vulnerability was named CVE-2026-54544 since 06/15/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available.

Upgrading to version 1.6.16 eliminates this vulnerability.

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Productinfo

Vendor

• ShaneIsrael

Name

• Fireshare

Version

• 1.6.0
• 1.6.1
• 1.6.2
• 1.6.3
• 1.6.4
• 1.6.5
• 1.6.6
• 1.6.7
• 1.6.8
• 1.6.9
• 1.6.10
• 1.6.11
• 1.6.12
• 1.6.13
• 1.6.14
• 1.6.15

Website

• Product: https://github.com/ShaneIsrael/fireshare/

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