CVE-2026-18147 Freeipa: ipa: freeipa/idm: cross-site scripting vulnerability allows arbitrary code execution via crafted url
An unauthenticated attacker can execute arbitrary JavaScript via a crafted link in the FreeIPA password reset page, potentially gaining administrative control.
- 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
- Available
What is CVE-2026-18147?
CVE-2026-18147 is a high-severity cross-site scripting vulnerability in Red Hat Enterprise Linux 10, published on 9 Sep 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
A flaw was found in FreeIPA. An unauthenticated remote attacker could exploit a DOM Cross-Site Scripting (XSS) vulnerability in the FreeIPA/IdM Web UI password reset page. By enticing a victim to click a specially crafted link and complete a password reset, the attacker could inject and execute arbitrary JavaScript code. This allows the attacker to perform actions within the victim's authenticated session, potentially leading to full administrative control if an IdM administrator is targeted.
Weakness: CWE-79
Which versions are affected by CVE-2026-18147?
How do I fix CVE-2026-18147?
Apply the vendor's patch.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-18147 being exploited?
There is no known exploitation of CVE-2026-18147 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-18147, GHSA-8gwp-8p3v-22jh, UBUNTU-CVE-2026-18147.