Vulnerability record · CVE-2025-9308 · published 21 August 2025

CVE-2025-9308: Yarnpkg yarn uncontrolled resource consumption vulnerability

Yarnpkg · Yarn

A vulnerability has been found in yarnpkg Yarn up to 1.22.22. This impacts the function setOptions of the file src/util/request-manager.js. Such manipulation leads to inefficient regular expression complexity. Local access is required to approach this attack. This vulnerability only affects products that are no longer supported by the maintainer.

4.8 CVSS 4.0 Medium EPSS 0.21% · top 90.3% CWE-400 · Uncontrolled resource consumptionCWE-1333 · Inefficient regular expression (ReDoS)

4.8CVSS 4.0 base score, v2 1.7

0.21%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

5References, 2 tagged exploit

17 Jun 2026Last modified by NVD

Description

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Yarn Yarnpkg

References

Link	Tags
https://github.com/yarnpkg/yarn/pull/9203	ExploitIssue Tracking
https://vuldb.com/?ctiid.320913	Permissions RequiredVDB Entry
https://vuldb.com/?id.320913	Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.633486	Third Party AdvisoryVDB Entry
https://github.com/yarnpkg/yarn/pull/9203	ExploitIssue Tracking

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2025-9308), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.