CVE-2025-9308

Name: CVE-2025-9308
Creator: NVD / NIST
Published: 2025-08-21T16:15:35.79+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.8/10EPSS 0.19%

Last modified Jun 17, 2026

CVE-2025-9308 is a medium-severity vulnerability rated 4.8/10 on the CVSS scale. 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. EPSS estimates a 0.19% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS 4.0

4.8/10

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

EPSS Probability

0.19%

8.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Yarnpkg	Yarn	<= 1.22.22

References

https://github.com/yarnpkg/yarn/pull/9203Exploit, Issue Tracking
https://vuldb.com/?ctiid.320913Permissions Required, VDB Entry
https://vuldb.com/?id.320913Third Party Advisory, VDB Entry
https://vuldb.com/?submit.633486Third Party Advisory, VDB Entry
https://github.com/yarnpkg/yarn/pull/9203Exploit, Issue Tracking

Timeline

Published: Aug 21, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-9308?

How severe is CVE-2025-9308?

CVE-2025-9308 has a CVSS score of 4.8/10 (MEDIUM severity). The EPSS model estimates a 0.19% probability of exploitation in the next 30 days.

How do I fix CVE-2025-9308?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-9308?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST