CVE-2026-95679 MISP Unauthenticated Blind SSRF via XML Body Processing
Unauthenticated attackers can trigger blind SSRF via crafted XML bodies, allowing internal network probing and reconnaissance on MISP servers.
- 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-2026-95679?
CVE-2026-95679 is a medium-severity server-side request forgery vulnerability in MISP, published on 22 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
MISP's RequestHandlerComponent automatically decodes XML request bodies on all write requests. The underlying Xml::build() library contains a logic error in its readFile guard condition (readFile && http || https), where PHP operator precedence causes the https branch to bypass the readFile check entirely. As a result, a request body containing a bare HTTPS URL is treated as a locator and fetched by the server. Because the cspReport endpoint accepts XML content type and is unauthenticated by design, an unauthenticated remote attacker can send a POST request with a crafted XML body to cause the MISP server to issue an outbound HTTPS request to an arbitrary target reachable from the server.
The attacker does not receive the response body, but can use the vulnerability to probe internal services, trigger actions on internal HTTPS endpoints, or perform timing-based reconnaissance of the server's network environment.
The vulnerability affects any MISP deployment where the cspReport endpoint is reachable and the server has network access to internal or external HTTPS services.
Which versions are affected by CVE-2026-95679?
How do I fix CVE-2026-95679?
No fix has been published for CVE-2026-95679 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-2026-95679 being exploited?
There is no known exploitation of CVE-2026-95679 in the wild and no public exploit code.
Sources
Also known as GHSA-95gm-v6rp-cf52.