CVE-2025-8262: A vulnerability was found in yarnpkg Yarn up to 1.22.22

Q: How do I fix CVE-2025-8262?

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

Q: Is CVE-2025-8262 being exploited?

CVE-2025-8262 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-2025-8262 affect?

CVE-2025-8262 affects yarn. Severity is medium (CVSS 4.3). A vulnerability was found in yarnpkg Yarn up to 1.22.22. It has been classified as problematic. Affected is the function explodeHostedGitFragment of the file src/resolvers/exotics/hosted-git-resolver.js. The manipulation leads to inefficien

Q: How urgent is CVE-2025-8262?

Priority 34/100. Public exploit reference

Routine

MEDIUM 4.3UPGRADE

CVE-2025-8262 is a medium-severity flaw (CVSS 4.3) affecting yarn. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was found in yarnpkg Yarn up to 1.22.22. It has been classified as problematic. Affected is the function explodeHostedGitFragment of the file src/resolvers/exotics/hosted-git-resolver.js. The manipulation leads to inefficient regular expression complexity. It is possible to launch the attack remotely. The patch is identified as 97731871e674bf93bcbf29e9d3258da8685f3076. It is recommended to apply a patch to fix this issue.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-400, CWE-1333
Published	2025-07-28
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

2025-07-28 07:15 UTCPublished CVE record published
2026-06-17 10:06 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-2025-8262?

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

Is CVE-2025-8262 being exploited?

CVE-2025-8262 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-2025-8262 affect?

CVE-2025-8262 affects yarn. Severity is medium (CVSS 4.3). A vulnerability was found in yarnpkg Yarn up to 1.22.22. It has been classified as problematic. Affected is the function explodeHostedGitFragment of the file src/resolvers/exotics/hosted-git-resolver.js. The manipulation leads to inefficien

How urgent is CVE-2025-8262?

Priority 34/100. Public exploit reference

Software pages

Git vulnerabilities

Related CVEs

CVE-2025-9308 LOW 3.3 UPGRADE A vulnerability has been found in yarnpkg Yarn up to 1.22.22

References

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