# CVE-2026-16644 — Drupal Webform REST

> As of 2026-08-25, CVE-2026-16644 is a vulnerability in Drupal Webform REST. No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-16644 as of 2026-08-25; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-08-25

## What is CVE-2026-16644?

Incorrect Authorization vulnerability in Drupal Webform REST allows Forceful Browsing. This issue affects Webform REST versions: from 0.0.0 to 4.1.0.

The record classifies CVE-2026-16644 under weakness class [CWE-863](https://intel.threadlinqs.com/cwe/CWE-863). 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 41 days ago.

## Severity and exploitation probability

- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Published:** 2026-08-25

## Is CVE-2026-16644 being exploited?

It currently carries a trending score of 30 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [Drupal](https://intel.threadlinqs.com/vendors/drupal): Webform REST

## How to fix CVE-2026-16644

No vendor patch reference has been recorded for CVE-2026-16644 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-16644

No threat campaign in the Threadlinqs corpus currently references CVE-2026-16644, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, GitHub Security Advisories. Last verified by Threadlinqs on 2026-08-26.

**Other references**

- [drupal.org](https://www.drupal.org/sa-contrib-2026-087)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-16644
Full detection coverage and IOCs for threats exploiting CVE-2026-16644 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp