MISP cti-transmute up to 1.4.0 URL Validation server-side request forgery

Summaryinfo

A vulnerability identified as critical has been detected in MISP cti-transmute up to 1.4.0. This affects an unknown function of the component URL Validation. This manipulation causes server-side request forgery. This vulnerability appears as CVE-2026-73160. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in MISP cti-transmute up to 1.4.0. It has been declared as critical. Affected by this vulnerability is some unknown functionality of the component URL Validation. The manipulation with an unknown input leads to a server-side request forgery vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Affected versions of cti-transmute contain an SSRF vulnerability in the /fetch_misp_event and /misp_search_events endpoints. The URL validation routine checked whether a supplied hostname was itself an IP literal and rejected private, loopback, link-local, or reserved IPs. However, ordinary domain names were accepted without resolving them first. An attacker could therefore use a hostname whose DNS record pointed to an internal address and cause the cti-transmute server to issue requests into its internal network. The commit explicitly states that anonymous callers could make the server request the internal target and read the response. The fix resolves hostnames using socket.getaddrinfo(), checks that every resolved address is globally routable, and additionally places @login_required on both affected MISP fetch/search routes.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-73160 since 08/11/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available.

Applying the patch 4d29109a6f185d5e7c7f3b906f822ab34403f512 is able to eliminate this problem.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• MISP

Name

• cti-transmute

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4.0

License

• open-source

Website

• Product: https://github.com/MISP/cti-transmute/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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