3xpyth0n ideon up to 0.9.3 SSRF Protection ssrf-protection.ts validateUrlForSSRF server-side request forgery

Summaryinfo

A vulnerability was found in 3xpyth0n ideon up to 0.9.3. It has been declared as problematic. Affected by this issue is the function validateUrlForSSRF of the file lib/oauth/ssrf-protection.ts of the component SSRF Protection. The manipulation results in server-side request forgery. This vulnerability was named CVE-2026-65968. The attack may be performed from remote. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in 3xpyth0n ideon up to 0.9.3. Affected is the function validateUrlForSSRF of the file lib/oauth/ssrf-protection.ts of the component SSRF Protection. The manipulation with an unknown input leads to a server-side request forgery vulnerability. CWE is classifying the issue as CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. This is going to have an impact on confidentiality. CVE summarizes:

ideon is a self-hosted visual workspace. Prior to version 0.9.4, validateUrlForSSRF() / safeFetch() in lib/oauth/ssrf-protection.ts (and the parallel validateMcpUrl() in lib/security/validators.ts) perform SSRF host-blocking by string/regex matching on new URL(url).hostname. Their IPv6 branch only recognises the textual forms ::1, fe80:/fc00:/fd00: prefixes, and the dotted-decimal IPv4-mapped form ::ffff:127.x. It does not recognise the WHATWG-canonical IPv4-mapped-IPv6 host that Node emits for a mapped address, which is hex-compressed and bracket-wrapped: [::ffff:7f00:1] for 127.0.0.1, [::ffff:a9fe:a9fe] for 169.254.169.254. An authenticated user who registers a STREAMABLE_HTTP / SSE MCP server with URL http://[::ffff:7f00:1]:PORT/ (loopback) or http://[::ffff:a9fe:a9fe]/ (cloud metadata) passes both guards, and the server-side OAuth-discovery action then fetches that host, yielding server-side request forgery to loopback and to the cloud metadata service. This issue has been patched in version 0.9.4.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-65968 since 07/23/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. There are known technical details, but no exploit is available.

Upgrading to version 0.9.4 eliminates this vulnerability.

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Productinfo

Vendor

• 3xpyth0n

Name

• ideon

Version

• 0.9.0
• 0.9.1
• 0.9.2
• 0.9.3

Website

• Product: https://github.com/3xpyth0n/ideon/

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