CVE-2026-27591: Winter vulnerable to privilege escalation by authenticated backend users

CVE-2026-27591 · Severity: low · CVSS 3.1 · Published 2026-03-12

Winter vulnerable to privilege escalation by authenticated backend users

Technologies: winter/wn-backend-module (Packagist). Vendors: Packagist.

Quick answers

Is CVE-2026-27591 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-27591 being exploited in the wild.
How severe is CVE-2026-27591?
Low severity, with a CVSS score of 3.1, published 12 March 2026.
Which products and versions are affected?
winter/wn-backend-module (Packagist) ECOSYSTEM:introduced=1.2.0,fixed=1.2.12.
Is there a fix for CVE-2026-27591?
Yes. winter/wn-backend-module (Packagist): upgrade to 1.2.12 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2026-27591?
Check whether you run winter/wn-backend-module (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • winter/wn-backend-module (Packagist): upgrade to 1.2.12 or later
    composer require winter/wn-backend-module:^1.2.12

Affected products

  • winter/wn-backend-module (Packagist) ECOSYSTEM:introduced=1.2.0,fixed=1.2.12

Identifiers

  • CVE-2026-27591
  • GHSA-pgpf-m8m4-6cg6

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