# CVE-2026-91072: EWWW Image Optimizer < 8.8.0 - Admin+ WebP File Rename and Deletion via Unrestricted Path in WebP Migration Handler

> Administrators can rename or delete WebP files outside their site's uploads directory, potentially affecting other sites in a multisite network.

- **Severity:** Medium 4.4 (`CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 30 Sep 2026
- **Updated:** 30 Sep 2026
- **Also known as:** GHSA-6w6r-chf5-m436

## What is CVE-2026-91072?

CVE-2026-91072 is a medium-severity path traversal vulnerability in Unknown EWWW Image Optimizer, published on 30 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

The EWWW Image Optimizer WordPress plugin before 8.8.0 does not confine a WebP-derivative file migration routine to the current site's own uploads directory, letting an attacker with Administrator-level access rename or delete existing WebP-derivative image files outside that scope, including, on a multisite network, files belonging to a different site they have no access to.

Weakness: CWE-73 (External Control of File Name or Path)

## Which versions are affected by CVE-2026-91072?


## How do I fix CVE-2026-91072?

No fix has been published for CVE-2026-91072 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-91072 being exploited?

There is no known exploitation of CVE-2026-91072 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-91072 and fix it if it is affected.

What it is: CVE-2026-91072 is a medium-severity path traversal vulnerability in Unknown EWWW Image Optimizer, published on 30 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-91072 in the wild and no public exploit code.

Affected product: Unknown EWWW Image Optimizer. 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-2026-91072/ (Markdown: https://insights.sbomify.com/CVE-2026-91072/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-91072
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-91072
- OSV: https://osv.dev/vulnerability/CVE-2026-91072

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-91072/
Summaries are generated and may contain mistakes; the official description above is the record.