# CVE-2026-15386: Meow Gallery < 5.5.2 - Author+ Stored XSS via Attachment Alt-Text

> Authors can inject JavaScript via attachment alt-text in Meow Gallery, executing code in visitors' browsers including administrators.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 7 Aug 2026
- **Updated:** 7 Aug 2026
- **Also known as:** GHSA-ff3q-prph-g9j7

## What is CVE-2026-15386?

CVE-2026-15386 is a medium-severity cross-site scripting vulnerability in Unknown Meow Gallery, published on 7 Aug 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

The Meow Gallery WordPress plugin before 5.5.2 does not escape an attachment's alt text before outputting it into an attribute of the link it builds for linked galleries, allowing users with the Author role or above to store a JavaScript payload that executes in the browser of any visitor (including administrators) who views a post containing such a gallery.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-15386?


## How do I fix CVE-2026-15386?

No fix has been published for CVE-2026-15386 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-15386 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-15386 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-15386 and fix it if it is affected.

What it is: CVE-2026-15386 is a medium-severity cross-site scripting vulnerability in Unknown Meow Gallery, published on 7 Aug 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-15386 exists.

Affected product: Unknown Meow Gallery. 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-2026-15386/ (Markdown: https://insights.sbomify.com/CVE-2026-15386/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-15386
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-15386
- OSV: https://osv.dev/vulnerability/CVE-2026-15386

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-15386/
Summaries are generated and may contain mistakes; the official description above is the record.