Skip to main content
HIGH

CVE-2026-14257

CVSS v3

7.5

HIGH

EPSS Score

0.6 %

exploit probability, as of 2026-10-17

CISA KEV

No

known exploited

Exploitation

—

SSVC status

Get an alert for each new CVE published for brace-expansion. Watch brace-expansion in CVE Watch Free account · no credit card

Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • brace-expansionnpmall versions · fixed in 1.1.17
  • nodejsAlmaLinux:10all versions · fixed in 1:22.23.1-6.el10_2and 4 other packages
  • nodejsAlmaLinux:9all versions · fixed in 1:22.23.1-3.module_el9.8.0+291+0bb98cceand 4 other packages
  • nodejsAlmaLinux:8all versions · fixed in 1:22.23.1-3.module_el8.10.0+4251+b427b8a5and 4 other packages
  • nodejs-nodemonAlmaLinux:9all versions · fixed in 3.1.14-2.module_el9.8.0+291+0bb98cce
  • nodejs-nodemonAlmaLinux:8all versions · fixed in 3.1.14-2.module_el8.10.0+4252+aedd4c30
  • nodejs-npmAlmaLinux:10all versions · fixed in 1:10.9.8-1.22.23.1.6.el10_2
  • nodejs-packagingAlmaLinux:9all versions · fixed in 2021.06-6.module_el9.7.0+227+12323393and 1 other package

9 more package ranges on OSV.dev

Vendor advisories

  • CVE-2026-14257 Red Hat Product Security505 products fixed · 22 known affected

    brace-expansion: Brace-expansion: Denial of Service via memory exhaustion in expand() function

    exploit-intelligence-tech-preview/vulnerability-analysis-rhel9 as a component of Exploit Intelligence · openshift-lightspeed/lightspeed-agentic-console-rhel9 as a component of OpenShift Lightspeed · openshift-lightspeed/lightspeed-console-plugin-419-rhel9 as a component of OpenShift Lightspeed

  • RHSA-2026:70588 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.17.58 security and extras update

  • RHSA-2026:71179 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.6 Container Release Update

  • RHSA-2026:70267 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: Red Hat Quay 3.14.9

  • RHSA-2026:68681 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: Migration Toolkit for Containers (MTC) 1.8.17 update

  • RHSA-2026:65853 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.18.55 security and extras update

34 more advisories

Full record on NVD

Description

brace-expansion through 5.0.7 is vulnerable to denial of service via memory exhaustion. The expand() function limits the number of results with a max option (default 100,000) but does not bound the length of each result string. By chaining multiple brace groups, an attacker keeps the result count under the limit while making each result progressively longer, so total memory scales with both count and string length until the process hits a fatal, uncatchable out-of-memory error. About 7.5 KB of input ('{a,b}'.repeat(1500)) crashes a default Node.js process. Any application that passes attacker-influenced strings to brace-expansion.expand() - directly or transitively via minimatch / glob brace patterns - can be crashed by a small request. Fixed in 5.0.8 by adding a maxLength option (default 4,000,000) that bounds accumulated output and intermediate arrays.

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2026-07-23
Last Modified
2026-07-23

Frequently asked questions

What is CVE-2026-14257?

brace-expansion through 5.0.7 is vulnerable to denial of service via memory exhaustion. The expand() function limits the number of results with a max option (default 100,000) but does not bound the length of each result string. By chaining multiple brace groups, an attacker keeps the result count under the limit while making each result progressively longer, so total memory scales with both count and string length until the process hits a fatal, uncatchable out-of-memory error. About 7.5 KB of input ('{a,b}'.repeat(1500)) crashes a default Node.js process. Any application that passes attacker-influenced strings to brace-expansion.expand() - directly or transitively via minimatch / glob brace patterns - can be crashed by a small request. Fixed in 5.0.8 by adding a maxLength option (default 4,000,000) that bounds accumulated output and intermediate arrays.

Is CVE-2026-14257 actively exploited?

Active exploitation of CVE-2026-14257 has not been confirmed. Its EPSS score was 0.6% on 2026-10-17, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-14257?

CVE-2026-14257 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Running brace-expansion? Hear about its next vulnerability

CVE Watch matches each new CVE to the vendors and products you list (vendor and product, not the version) and puts it in your alerts with its KEV and EPSS status.

Get alerts for this productCISA KEV additions, October 2026Search CVEs

Already have an account? Open CVE WatchNo credit card required · 50 free checks/month · Free API key

Go further

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database