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Critical DoS Vulnerabilities in Azure-Storage-Azcopy Fixed

Critical DoS Vulnerabilities in Azure-Storage-Azcopy Fixed

First seen 11 Sep 2026, 18:32 UTC

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ThreatCluster AI
ThreatCluster September 11, 2026 at 22:47 UTC
  • Four critical CVEs fixed in azure-storage-azcopy, including CVE-2026-84303 with a CVSS of 9.1.
  • Vulnerabilities allow DoS attacks via oversized inputs and memory exhaustion.
  • Patches are available for multiple SUSE and openSUSE versions as of September 11, 2026.

SUSE and openSUSE released updates for azure-storage-azcopy to address critical DoS vulnerabilities. The updates fix four CVEs, including CVE-2026-84303, which has a CVSS score of 9.1, indicating a high severity. The vulnerabilities allow for denial-of-service attacks through various means, including oversized inputs and memory exhaustion. Affected systems include multiple Public Cloud Modules and openSUSE Leap versions. The patches are available as of September 11, 2026, and users are urged to apply them immediately. The vulnerabilities were published in June and September 2026, with significant implications for system stability and security. Administrators should follow recommended installation methods to ensure their systems are secured against these threats.

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Timeline

2026-06-04
CVE-2026-41178 published
Vulnerability allows DoS via oversized inputs in baggage parsing, affecting azure-storage-azcopy.
Linuxsecurity
2026-09-01
CVE-2026-84303 and CVE-2026-84304 published
CVE-2026-84303 allows authorization bypass, while CVE-2026-84304 causes heap memory exhaustion.
Linuxsecurity
2026-09-11
Patches released for azure-storage-azcopy
SUSE and openSUSE released updates to fix critical vulnerabilities in azure-storage-azcopy.
Linuxsecurity

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