What is CVE-2026-7790?

CVE-2026-7790 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. Unbounded chunk-size hex digits in cowlib cause quadratic CPU and memory DoS

Which CVE IDs does CVE-2026-7790 cover?

CVE-2026-7790 covers the following CVE IDs: CVE-2026-7790. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

Which products are affected by CVE-2026-7790?

CVE-2026-7790 affects 2 products, including: azl3 rabbitmq-server 3.13.7-3 on Azure Linux 3.0; azl3 rabbitmq-server 3.13.7-5 on Azure Linux 3.0.

CVE-2026-7790Medium

Unbounded chunk-size hex digits in cowlib cause quadratic CPU and memory DoS

Vendor

Microsoft Security Response Center (MSRC)

Published

May 22, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-7790 →

🎯 Affected products2

azl3 rabbitmq-server 3.13.7-3 on Azure Linux 3.0
azl3 rabbitmq-server 3.13.7-5 on Azure Linux 3.0

✅ Remediation

KBCBL-Mariner Releases (Security Update) — fixed build 3.13.7-4 KBCBL-Mariner Releases (Security Update) — fixed build 3.13.7-5

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-7790
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade