# 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.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 11 Aug 2026
- **Updated:** 11 Aug 2026
- **Also known as:** GHSA-x373-32xc-7gqv

## 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 (Server-Side Request Forgery)

## 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.

## Is CVE-2026-73160 being exploited?

There is no known exploitation of CVE-2026-73160 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-73160 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2026-73160 in the wild and no public exploit code.

Affected product: MISP cti-transmute. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-73160/ (Markdown: https://insights.sbomify.com/CVE-2026-73160/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-73160
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-73160
- OSV: https://osv.dev/vulnerability/CVE-2026-73160

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-73160/
Summaries are generated and may contain mistakes; the official description above is the record.