CVE-2026-73160 cti-transmute Unauthenticated SSRF via Hostnames Resolving to Internal IP Addresses
Unauthenticated attackers can exploit SSRF in cti-transmute to access internal network resources by using hostnames that resolve to private IP addresses.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-73160?
CVE-2026-73160 is a high-severity server-side request forgery vulnerability in MISP cti-transmute, published on 11 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-918
Which versions are affected by CVE-2026-73160?
How do I fix CVE-2026-73160?
No fix has been published for CVE-2026-73160 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-73160 being exploited?
There is no known exploitation of CVE-2026-73160 in the wild and no public exploit code.
Sources
Also known as GHSA-x373-32xc-7gqv.