Adobe Commerce PolyShell Attacks Breach Hundreds of Stores as Brotli Exploit Traffic Emerges
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Tuesday added two vulnerabilities impacting Adobe Commerce and Magento, and Google's Brotli decoder library to its Known Exploited Vulnerabilities (KEV) catalog, citing evidence of active exploitation. The vulnerabilities are listed below - CVE-2026-111497 (CVSS score: 9.2) - An unchecked return value vulnerability in
Summary from The Hacker News.
Explained
The technology and terms in this story. Learn more
- ConceptKEV · Known Exploited Vulnerabilities catalogCISA's list of vulnerabilities with evidence of real-world exploitation.
- ConceptCVSS · Common Vulnerability Scoring SystemA 0–10 score for how severe a vulnerability is in theory.
- ConceptExploitCode or a technique that turns a software flaw into something an attacker can actually use.
- ConceptCISA · Cybersecurity and Infrastructure Security AgencyThe US government's cybersecurity agency, which issues alerts and runs the KEV catalog.
Why it was possible
The weaknesses behind this story's CVEs, from each CVE Record.
Vulnerabilities in this story
Severity and exploitation facts from NVD, FIRST, and CISA.
Related coverage
Other sources covering the same vulnerabilities or event.
SANS Stormcast Tuesday, October 27th, 2026: Apple Patches 304 Vulnerabilities Incl. Exploited CoreGraphics Flaw; Threat Hunting in DShield SIEM with ELK; .NET and PHP Brotli Fixes (CVE-2026-111497)
Podcast7 minSANS Internet Storm Center StormCastyesterdayThreat IntelVulnerabilitiesCVE-2026-111497CVE-2026-28864+2