Node.js CVE-2026-23888
MEDIUM
GHSA-6pfh-p556-v868
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Primary rating from GitHub Advisory.
CVSS VectorGitHub Advisory
Lifecycle Timeline
4DescriptionGitHub Advisory
pnpm is a package manager. Prior to version 10.28.1, a path traversal vulnerability in pnpm's binary fetcher allows malicious packages to write files outside the intended extraction directory. The vulnerability has two attack vectors: (1) Malicious ZIP entries containing ../ or absolute paths that escape the extraction root via AdmZip's extractAllTo, and (2) The BinaryResolution.prefix field is concatenated into the extraction path without validation, allowing a crafted prefix like ../../evil to redirect extracted files outside targetDir. The issue impacts all pnpm users who install packages with binary assets, users who configure custom Node.js binary locations and CI/CD pipelines that auto-install binary dependencies. It can lead to overwriting config files, scripts, or other sensitive files leading to RCE. Version 10.28.1 contains a patch.
AnalysisAI
Path traversal in pnpm's binary fetcher (versions prior to 10.28.1) allows attackers to write files outside the intended extraction directory through malicious ZIP entries or crafted prefix values, potentially overwriting critical configuration files and scripts on affected systems. All pnpm users installing packages with binary assets are vulnerable, particularly those in CI/CD pipelines or with custom Node.js binary configurations. Public exploit code exists for this medium-severity vulnerability.
Technical ContextAI
Classified as CWE-22 (Path Traversal). Affects Pnpm. pnpm is a package manager. Prior to version 10.28.1, a path traversal vulnerability in pnpm's binary fetcher allows malicious packages to write files outside the intended extraction directory. The vulnerability has two attack vectors: (1) Malicious ZIP entries containing ../ or absolute paths that escape the extraction root via AdmZip's extractAllTo, and (2) The BinaryResolution.prefix field is concatenated into the extraction path without validation, allowing a crafted prefix like `../../
RemediationAI
A vendor patch is available — apply it immediately. Validate and sanitize file path inputs. Use allowlists. Restrict network access to the affected service where possible.
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Same weakness CWE-22 – Path Traversal
View allSame technique Path Traversal
View allVendor StatusVendor
SUSE
Severity: MediumShare
External POC / Exploit Code
Leaving vuln.today