CVE-2026-10861 MISP post-login open redirect via pre_login_requested_url
An attacker can redirect authenticated MISP users to malicious external sites, facilitating phishing attacks and credential theft.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-10861?
CVE-2026-10861 is a medium-severity vulnerability in Misp-Project Misp, published on 4 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
An open redirect vulnerability existed in MISP UsersController::routeafterlogin() because the value stored in the pre_login_requested_url session key was used as the post-login redirect destination without sufficiently enforcing that it was a local application path.
An unauthenticated remote attacker could craft a link that causes a victim to visit a trusted MISP instance and, after successful authentication, be redirected to an attacker-controlled external URL. This could be abused to increase the credibility of phishing attacks, redirect users to counterfeit login pages, or deliver attacker-controlled content from an untrusted domain. CWE-601 describes this weakness as accepting user-controlled input that specifies an external link and using it in a redirect, with phishing as a common consequence.
The patch mitigates the issue by decoding and parsing the URL, rejecting URLs with a scheme, host, user component, missing or non-local path, and protocol-relative forms such as //example.com and /\example.com.
Weakness: CWE-601
Which versions are affected by CVE-2026-10861?
It affects 1 product.
Products include Misp-Project Misp.
How do I fix CVE-2026-10861?
No fix has been published for CVE-2026-10861 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-10861 being exploited?
There is no known exploitation of CVE-2026-10861 in the wild and no public exploit code.
Other vulnerabilities in Misp-Project Misp
Sources
Also known as GHSA-9gjj-gmcx-6fhj.