# 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.

- **Severity:** High 8.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N`)
- **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:** Yes
- **Published:** 9 Sep 2026
- **Updated:** 26 Oct 2026
- **Also known as:** DEBIAN-CVE-2026-18147, GHSA-8gwp-8p3v-22jh, UBUNTU-CVE-2026-18147

## 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 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-18147?


## How do I fix CVE-2026-18147?

Apply the vendor's patch.

## Is CVE-2026-18147 being exploited?

There is no known exploitation of CVE-2026-18147 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-18147 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2026-18147 in the wild and no public exploit code.

Affected product: Red Hat Enterprise Linux 10. 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-2026-18147/ (Markdown: https://insights.sbomify.com/CVE-2026-18147/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-18147
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-18147
- OSV: https://osv.dev/vulnerability/CVE-2026-18147

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-18147/
Summaries are generated and may contain mistakes; the official description above is the record.