CVE-2026-27904 | minimatch ReDoS: nested *() extglobs generate catastrophically backtracking regular expressions

Exp

minimatch is a minimal matching utility for converting glob expressions into JavaScript RegExp objects. Prior to version 10.2.3, 9.0.7, 8.0.6, 7.4.8, 6.2.2, 5.1.8, 4.2.5, and 3.1.4, nested `*()` extglobs produce regexps with nested unbounded quantifiers (e.g. `(?:(?:a|b)*)*`), which exhibit catastrophic backtracking in V8. With a 12-byte pattern `*(*(*(a|b)))` and an 18-byte non-matching input, `minimatch()` stalls for over 7 seconds. Adding a single nesting level or a few input characters pushes this to minutes. This is the most severe finding: it is triggered by the default `minimatch()` API with no special options, and the minimum viable pattern is only 12 bytes. The same issue affects `+()` extglobs equally. Versions 10.2.3, 9.0.7, 8.0.6, 7.4.8, 6.2.2, 5.1.8, 4.2.5, and 3.1.4 fix the issue.

Published: 2026-02-25 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]

NVD Status：Analyzed，CVE State: published

View at NVD, CVE.org, EUVD

Threat Intelligence & Risk Assessment for CVE-2026-27904

EPSS CVSS CWE GHSA Exploit-DB Affected OS Tracker

Conclusion & alert: CVE-2026-27904 is rated Exploit Available (58/100): CVSS High severity, with low exploitation likelihood (EPSS 0.46%). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2026-27904

EDB-ID	Source	Kind	Published	Link
—	nvd_ref	exploit_tag		Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2026-27904

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.02%	0.46%	+0.44%
2	2026-03-21	0.05%	0.02%	-0.03%
3	2026-03-04	—	0.05%	—

Full EPSS history (4 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-27904

CVSS metrics for this CVE.

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
7.5	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	3.9	3.6	[email protected]

Weakness enumeration for CVE-2026-27904

CWE-1333 MITRE ↗

GitHub Security Advisory for CVE-2026-27904

GHSA-23c5-xmqv-rm74 · Severity: high · Ecosystem: npm — minimatch ReDoS: nested *() extglobs generate catastrophically backtracking regular expressions

OS Trackers for CVE-2026-27904

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2026-27904 not yet assigned priority: Debian including 1 source packages (node-minimatch), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 3, resolved 2.	https://security-tracker.debian.org/tracker/CVE-2026-27904
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2026-27904
`suse`	high	CVE-2026-27904 severity important: SUSE including 62 source package names (corepack20, corepack22, …), 178 product×package rows across 28 product lines (SUSE Liberty Linux 8, SUSE Liberty Linux 9, … (28 product lines)): Known Not Affected 158, Fixed 20.	https://www.suse.com/security/cve/CVE-2026-27904/
`ubuntu`	medium	CVE-2026-27904 medium priority: Ubuntu including 1 source packages (node-minimatch), 8 status rows across 8 suites (bionic, focal, jammy, noble, questing, trusty, upstream, xenial): needs-triage 8.	https://ubuntu.com/security/CVE-2026-27904

Affected software / configurations for CVE-2026-27904

Vendor	Product	Version	Raw CPE
minimatch_project	minimatch	< 3.1.4	cpe:2.3:a:minimatch_project:minimatch::::::node.js::*
minimatch_project	minimatch	>= 4.0.0, < 4.2.5	cpe:2.3:a:minimatch_project:minimatch::::::node.js::*
minimatch_project	minimatch	>= 5.0.0, < 5.1.8	cpe:2.3:a:minimatch_project:minimatch::::::node.js::*
minimatch_project	minimatch	>= 6.0.0, < 6.2.2	cpe:2.3:a:minimatch_project:minimatch::::::node.js::*
minimatch_project	minimatch	>= 7.0.0, < 7.4.8	cpe:2.3:a:minimatch_project:minimatch::::::node.js::*
minimatch_project	minimatch	>= 8.0.0, < 8.0.6	cpe:2.3:a:minimatch_project:minimatch::::::node.js::*
minimatch_project	minimatch	>= 9.0.0, < 9.0.7	cpe:2.3:a:minimatch_project:minimatch::::::node.js::*
minimatch_project	minimatch	>= 10.0.0, < 10.2.3	cpe:2.3:a:minimatch_project:minimatch::::::node.js::*

References for CVE-2026-27904

URL	Tags
https://github.com/isaacs/minimatch/security/advisories/GHSA-23c5-xmqv-rm74	Exploit Vendor Advisory

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