# CVE-2026-18335: Server-side request forgery in Kirki – Freeform Page Builder, Website Builder & Customizer

> Unauthenticated attackers can exploit a blind SSRF vulnerability in the Kirki WordPress plugin to query and modify internal services.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 24 Sep 2026
- **Updated:** 24 Sep 2026
- **Also known as:** GHSA-8q4x-8xp2-6ww3

## What is CVE-2026-18335?

CVE-2026-18335 is a medium-severity server-side request forgery vulnerability in themeum Kirki – Freeform Page Builder, Website Builder & Customizer, published on 24 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Kirki – Freeform Page Builder, Website Builder & Customizer plugin for WordPress is vulnerable to Blind Server-Side Request Forgery in all versions up to, and including, 6.2.0 via the 'kirki_data' Parameter. This makes it possible for unauthenticated attackers to make web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services.

Weakness: CWE-918 (Server-Side Request Forgery)

## Which versions are affected by CVE-2026-18335?


## How do I fix CVE-2026-18335?

No fix has been published for CVE-2026-18335 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-18335 being exploited?

There is no known exploitation of CVE-2026-18335 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-18335 and fix it if it is affected.

What it is: CVE-2026-18335 is a medium-severity server-side request forgery vulnerability in themeum Kirki – Freeform Page Builder, Website Builder & Customizer, published on 24 Sep 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-2026-18335 in the wild and no public exploit code.

Affected product: themeum Kirki – Freeform Page Builder, Website Builder & Customizer. 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-2026-18335/ (Markdown: https://insights.sbomify.com/CVE-2026-18335/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-18335
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-18335
- OSV: https://osv.dev/vulnerability/CVE-2026-18335

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-18335/
Summaries are generated and may contain mistakes; the official description above is the record.