CVE-2026-50015
CVE-2026-50015 is a high-severity vulnerability in Pnpm with a CVSS 3.x base score of 7.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.
Key facts
- Severity: High (CVSS 3.x base score 7.3)
- EPSS exploit prediction: 0% (19th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-39492
- Weakness: CWE-22
- Affected product: Pnpm
- Published:
- Last modified:
Description
pnpm is a package manager. Prior to 10.34.0 and 11.4.0, pnpm's patch application pipeline (@pnpm/patch-package) performs no path validation on file paths extracted from .patch files. An attacker who contributes a malicious patch file via a pull request can write attacker-controlled content to or delete arbitrary files on the filesystem during pnpm install, as the user running the install. The diff --git header paths containing ../../ sequences traverse out of the package directory, and the traversal is difficult to catch in code review because patch file diff headers are opaque to most reviewers. This vulnerability is fixed in 10.34.0 and 11.4.0.
Frequently asked questions
- What is CVE-2026-50015?
- pnpm is a package manager. Prior to 10.34.0 and 11.4.0, pnpm's patch application pipeline (@pnpm/patch-package) performs no path validation on file paths extracted from .patch files. An attacker who contributes a malicious patch file via a pull request can write attacker-controlled content to or delete arbitrary files on the filesystem during pnpm install, as the user running the install. The diff --git header paths containing ../../ sequences traverse out of the package directory, and the traversal is difficult to catch in code review because patch file diff headers are opaque to most reviewers. This vulnerability is fixed in 10.34.0 and 11.4.0.
- How severe is CVE-2026-50015?
- CVE-2026-50015 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity high, and availability high.
- Is CVE-2026-50015 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-50015?
- CVE-2026-50015 affects Pnpm. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-50015?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2026-50015 have an EU (EUVD) identifier?
- Yes. CVE-2026-50015 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39492.
- When was CVE-2026-50015 published?
- CVE-2026-50015 was published on 2026-06-25 and last updated on 2026-06-29.
References
Affected products (1)
- cpe:2.3:a:pnpm:pnpm:*:*:*:*:*:node.js:*:*
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