CVE-2025-9308: A vulnerability has been found in yarnpkg Yarn up to 1.22.22

Q: How do I fix CVE-2025-9308?

yarn: upgrade to newer than 1.22.22. Exact commands for each OS are on this page.

Q: Is CVE-2025-9308 being exploited?

CVE-2025-9308 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-9308 affect?

CVE-2025-9308 affects yarn. Severity is low (CVSS 3.3). 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 ap

Q: How urgent is CVE-2025-9308?

Priority 20/100. Public exploit reference

Routine

LOW 3.3UPGRADE

CVE-2025-9308 is a low-severity flaw (CVSS 3.3) affecting yarn. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	3.3 (Low)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 88%)
CISA exploited list	No
Weakness	CWE-400, CWE-1333
Published	2025-08-21
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: yarnpkg

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-08-21 16:15 UTCPublished CVE record published
2026-06-17 10:08 UTCUpdated Record last modified

yarnpkg yarn UPGRADE

Affected: <= 1.22.22

Fixed in: newer than 1.22.22

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy yarn || rpm -q yarn || yarn --version

2. UPGRADE to newer than 1.22.22 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade yarn

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade yarn

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-9308?

yarn: upgrade to newer than 1.22.22. Exact commands for each OS are on this page.

Is CVE-2025-9308 being exploited?

CVE-2025-9308 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-9308 affect?

CVE-2025-9308 affects yarn. Severity is low (CVSS 3.3). 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 ap

How urgent is CVE-2025-9308?

Priority 20/100. Public exploit reference

Related CVEs

CVE-2025-8262 MEDIUM 4.3 UPGRADE A vulnerability was found in yarnpkg Yarn up to 1.22.22

References

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