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Public proof of conceptFix available

CVE-2025-9308

A public proof of concept exists; no exploitation attested.

  • Published2025-08-21
  • WeaknessCWE-1333 · CWE-400

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2025-08-2116:15CVE publishedNVD

Versions per branch

NVD
Yarnpkg yarn
BranchAffectedFixed in
1.22≤ 1.22.22no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As VulDB, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • yarnpkg Yarn
    Affected
    • = 1.22.0no fix stated
    • = 1.22.1no fix stated
    • = 1.22.2no fix stated
    • = 1.22.3no fix stated
    • = 1.22.4no fix stated
    • = 1.22.5no fix stated
    • = 1.22.6no fix stated
    • = 1.22.7no fix stated

    15 more version lines in the CVE record.

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2025-08-21

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • node-yarnpkgUbuntu:26.10all versions · no fixed version listed
  • node-yarnpkgUbuntu:26.04:LTSall versions · no fixed version listed
  • node-yarnpkgUbuntu:25.10all versions · no fixed version listed
  • node-yarnpkgUbuntu:24.04:LTSall versions · no fixed version listed
  • node-yarnpkgUbuntu:22.04:LTSall versions · no fixed version listed
  • node-yarnpkgUbuntu:20.04:LTSall versions · no fixed version listed
  • node-yarnpkgDebian:14all versions · fixed in 4.0.2+dfsg-2
  • node-yarnpkgDebian:13all versions · fixed in 4.0.2+dfsg-2

4 more package ranges on OSV.dev

Vendor advisories

  • CVE-2025-9308 Red Hat Product Security34 known affected

    yarn: yarnpkg regular expression denial of service

    migration-toolkit-virtualization/mtv-console-plugin-rhel9.src as a component of Migration Toolkit for Virtualization · mtv-candidate/mtv-console-plugin-rhel9.src as a component of Migration Toolkit for Virtualization · openshift-service-mesh/kiali-ossmc-rhel8.src as a component of OpenShift Service Mesh 2 · +31 more

Full record on NVD

Fix

  1. Workaround from the vendor Red Hat Product Security CVE-2025-9308 · 34 productsMitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
  2. No fix available, says the vendor Red Hat Product Security CVE-2025-9308 · 34 productsFix deferred

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CISA-ADPSSVC decisionpoc2025-08-21
  • CNACVSS 4.04.8known since 2026-10-23
  • CNACVSS 3.13.3known since 2026-10-23
  • NVDCVSS 3.15.5read 2026-10-23
  • CNACVSS 2.01.7known since 2026-10-23
  • CNAweakness (CWE)CWE-1333, CWE-400known since 2026-10-23
  • NVDweakness (CWE)CWE-1333read 2026-10-23
  • FIRST EPSSEPSS score0.2 %2026-11-08
  • OSVaffected packages—
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS 4.0 vector
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:X/V:X/RE:X/U:X
Published
2025-08-21
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-pfv3-xh9q-f4rq

Frequently asked questions

What is CVE-2025-9308?

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.

Is CVE-2025-9308 actively exploited?

A proof-of-concept exploit exists for CVE-2025-9308, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2025-9308?

CVE-2025-9308 has a CVSS v3 base score of 5.5 (MEDIUM severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

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