Vulnerability · Published Oct 30, 2026 · Assigned by drupal
CVE-2026-118574S3 File System - Moderately critical - Access bypass - SA-CONTRIB-2026-279
Unrated
In plain English
A incorrect permission assignment in S3 File System from Drupal. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS )–Not rated
Exploit odds (30 days)0.1%top 97.2% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
Incorrect Permission Assignment for Critical Resource vulnerability in Drupal S3 File System allows Exploiting Incorrectly Configured Access Control Security Levels. This issue affects S3 File System versions: from 0.0.0 to 3.12.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Packagist:https://packages.drupal.org/8 | drupal/s3fs | 3.12.0 | DRUPAL-CONTRIB-2026-279 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Drupal | S3 File System | 0.0.0 – before 3.12.0 |
Weakness: CWE-732