# CVE-2026-79987: Low-privilege RCE through element-search eager loading

> Authenticated low-privilege users can execute arbitrary OS commands via element-search eager loading in Craft CMS.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 10 Sep 2026
- **Updated:** 11 Sep 2026
- **Also known as:** GHSA-9c4j-cjw3-r3xx, GHSA-fpmm-w3hp-7f39

## What is CVE-2026-79987?

CVE-2026-79987 is a high-severity code injection vulnerability in craftcms cms, published on 10 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A remote, authenticated, non-admin Craft CMS Control Panel user with only the accessCp permission can execute operating system commands as the PHP web worker.

Weakness: CWE-470 (Use of Externally-Controlled Input to Select Classes or Code)

## Which versions are affected by CVE-2026-79987?


## How do I fix CVE-2026-79987?

No fix has been published for CVE-2026-79987 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-79987 being exploited?

There is no known exploitation of CVE-2026-79987 in the wild and no public exploit code.

Public exploit code:

- Independent public PoC for CVE-2026-79987 — Craft CMS 5.9.0–5.10.12 authenticated RCE. Patch-analysis n-day implementation, verified on vanilla lab. Advisory: GHSA-9c4j-cjw3-r3xx (github_poc): https://github.com/y3g1/CraftCMS-CVE-2026-79987

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-79987 and fix it if it is affected.

What it is: CVE-2026-79987 is a high-severity code injection vulnerability in craftcms cms, published on 10 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-79987 in the wild and no public exploit code.

Affected product: craftcms cms. 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-2026-79987/ (Markdown: https://insights.sbomify.com/CVE-2026-79987/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-79987
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-79987
- OSV: https://osv.dev/vulnerability/CVE-2026-79987

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-79987/
Summaries are generated and may contain mistakes; the official description above is the record.