CVE-2026-69152: brace-expansion: DoS via unbounded intermediate arrays, bypassing the CVE-2026-14257 mitigation

highCVSS 7.5CVE-2026-69152

CSIRTS triage

vendor: npm product: brace-expansion Denial of service

What: Denial-of-service via unbounded intermediate arrays that bypasses previous CVE-2026-14257 mitigation.
Who is affected: Applications and tools using brace-expansion package, particularly Node.js projects processing untrusted input.
Urgency: High (CVSS 7.5); known DoS vector with ineffective prior fix.
Action: Update brace-expansion to patched version or switch to alternative expansion library.

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: high — CVSS 7.5
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69152

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-2026-691520.41% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 34% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-69152	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

Recent advisories for brace-expansion

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.

medium[NEW] [medium] Red Hat Enterprise Linux (brace-expansion): Vulnerability allows denial of servicecert-bund · 2026-08-14
high[NEW] [high] Red Hat Ansible Automation Platform (node-tar, linkify-it, protobufjs, brace-expansion, fast-uri,…cert-bund · 2026-08-13
highCVE-2026-14257: brace-expansion DoS via unbounded expansion length causing an out-of-memory process crashmsrc · 2026-08-06
highCVE-2026-69152: The brace-expansion library generates arbitrary strings containing a common prefix and suffix.…nvd · 2026-08-03
highGHSA-rgw5-rvv9-x895: brace-expansion: DoS via unbounded intermediate arrays, bypassing the CVE-2026-14257 miti…ghsa · 2026-08-03
highGHSA-mh99-v99m-4gvg: brace-expansion: DoS via unbounded expansion length causing an out-of-memory process cras…ghsa · 2026-07-24