What is CVE-2026-49839?

CVE-2026-49839 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. jq --rawfile invalid-state reuse after String too long causes heap-buffer-overflow

Which CVE IDs does CVE-2026-49839 cover?

CVE-2026-49839 covers the following CVE IDs: CVE-2026-49839. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-49839?

CVE-2026-49839 has a CVSS v3 base score of 7.1, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-49839?

CVE-2026-49839 affects 2 products, including: azl3 jq 1.7.1-6 on Azure Linux 3.0; azl3 jq 1.7.1-8 on Azure Linux 3.0.

CVE-2026-49839HighCVSS 7.1

jq --rawfile invalid-state reuse after String too long causes heap-buffer-overflow

Vendor

Microsoft Security Response Center (MSRC)

Published

June 30, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-49839 →

🎯 Affected products2

azl3 jq 1.7.1-6 on Azure Linux 3.0
azl3 jq 1.7.1-8 on Azure Linux 3.0

✅ Remediation

KBCBL-Mariner Releases (Security Update) — fixed build 1.7.1-7

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49839
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade