TI-2025-08532 Aliases CVE-2025-9308 GHSA-pfv3-xh9q-f4rq

yarnpkg Yarn request-manager.js setOptions redos

MEDIUM 55CWE-1333Published 2025-08-21 · Updated 2025-08-21

Key facts

Attack vector: Local
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · Low
Fix status: Deferred Red Hat: fix deferred

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-1333.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00215 12th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Deferred Red Hat: fix deferred

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
yarnpkg	Yarn	1.22.0; 1.22.1; 1.22.2; 1.22.3; 1.22.4; 1.22.5; 1.22.6; 1.22.7; 1.22.8; 1.22.9; 1.22.10; 1.22.11; 1.22.12; 1.22.13; 1.22.14; 1.22.15; 1.22.16; 1.22.17; 1.22.18; 1.22.19; 1.22.20; 1.22.21; 1.22.22	—	No fix listed	CNA

Yarn Vendoryarnpkg Affected 1.22.0; 1.22.1; 1.22.2; 1.22.3; 1.22.4; 1.22.5; 1.22.6; 1.22.7; 1.22.8; 1.22.9; 1.22.10; 1.22.11; 1.22.12; 1.22.13; 1.22.14; 1.22.15; 1.22.16; 1.22.17; 1.22.18; 1.22.19; 1.22.20; 1.22.21; 1.22.22 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:yarnpkg:yarn::::::::	up to 1.22.22	Vulnerable	yarnpkg

cpe:2.3:a:yarnpkg:yarn:*:*:*:*:*:*:*:* Versions up to 1.22.22 Vulnerable ·yarnpkg

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

Product	Status	Plan or fix
Migration Toolkit for Virtualization	Affected	No fix yet: Fix deferred
OpenShift Service Mesh 2	Affected	No fix yet: Fix deferred
OpenShift Service Mesh 3	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 8	Affected	No fix yet: Fix deferred
Red Hat OpenShift GitOps	Affected	No fix yet: Fix deferred

Timeline

2026-10-02 Threatist record created from CVE-2025-9308
2026-10-03 Alias added: GHSA-pfv3-xh9q-f4rq

References

Exploit 1

https://github.com/yarnpkg/yarn/pull/9203

TI-2025-07562 yarnpkg Yarn hosted-git-resolver.js explodeHostedGitFragment redos CVSS 4.0MEDIUM 5.3
TI-2020-06549 Path traversal in yarn CVSS 3.1HIGH 7.5
TI-2019-08038 Link following in Yarn CVSS 3.1HIGH 7.8
TI-2021-03291 Yarn: untrusted search path CVSS 3.1HIGH 7.8
TI-2019-03856 Cleartext transmission of sensitive information in yarn CVSS 3.1HIGH 8.1
TI-2019-11707 Time-of-check time-of-use race condition in yarn CVSS 3.1MEDIUM 5.9

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences