CVE-2026-47770: jq: stack overflow in deep structural equality

mediumCVSS 5.5CVE-2026-47770

CSIRTS triage

vendor: jq product: jqOther

What: There is a stack overflow vulnerability in deep structural equality.
Who is affected: Users of jq that utilize deep structural equality features.
Urgency: Remediation is medium urgency due to a medium severity rating of 5.5.
Action: Update to the latest version of jq.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 5.5
Published: 2026-06-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47770

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-477700.11% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-47770	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

medium[UPDATE] [medium] jq: Multiple vulnerabilities allow Denial of Servicecert-bund

Recent advisories for jq

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

high[UPDATE] [high] Red Hat Hardened Images RPMs (jq and pyOpenSSL): Multiple vulnerabilitiescert-bund · 2026-07-09
medium[UPDATE] [medium] jq: Multiple vulnerabilities allow Denial of Servicecert-bund · 2026-07-08
medium[UPDATE] [medium] jq: Vulnerability allows denial of servicecert-bund · 2026-07-08
medium[UPDATE] [medium] jq: Vulnerability allows unspecified attackcert-bund · 2026-07-02
high[UPDATE] [high] jq: Multiple vulnerabilitiescert-bund · 2026-07-02
medium[UPDATE] [medium] jq: Vulnerability allows bypassing security measurescert-bund · 2026-07-02