{"answers":{"affected":"2 open source packages ship an affected version, including pnpm. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-23888 exists.","fix":"Upgrade pnpm to 10.28.1 or later.","what":"CVE-2026-23888 is a medium-severity path traversal vulnerability in pnpm, published on 26 Jan 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-23888 and fix it if it is affected.\n\nWhat it is: CVE-2026-23888 is a medium-severity path traversal vulnerability in pnpm, published on 26 Jan 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-23888 exists.\n\nAffected packages and fixed versions:\n- pnpm (npm): affected all versions; fixed in 10.28.1\n- pnpm (npm): affected all versions; fixed in 10.28.1\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-23888/ (Markdown: https://insights.sbomify.com/CVE-2026-23888/index.md)","id":"CVE-2026-23888","markdown":"https://insights.sbomify.com/CVE-2026-23888/index.md","name":"CVE-2026-23888","record":{"aliases":["GHSA-6pfh-p556-v868","MINI-ghq9-c9r5-p326"],"analysis":{"component_type":"developer_tool","fix_type":"upgrade","impacts":["code_execution","data_modify"],"network_reachable":"yes","non_default_config":false,"product_category":"pnpm package manager","requires_auth":"none","summary":"Malicious packages can write files outside the extraction directory via path traversal, potentially leading to remote code execution.","user_interaction":"required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"pnpm","vendor":"pnpm"}],"cvss":{"score":6.5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-426","name":"Untrusted Search Path"},{"id":"CWE-23","name":"Relative Path Traversal"},{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory"}],"description":"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.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"pnpm: Binary ZIP extraction allows arbitrary file write via path traversal (Zip Slip)","id":"CVE-2026-23888","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"path_traversal","year":"2026"},"n_packages":2,"n_references":3,"next":{"headline":"pnpm has Windows-specific tarball Path Traversal","id":"CVE-2026-23889"},"packages":[{"ecosystem":"npm","fixed":["10.28.1"],"introduced":["0"],"last_affected":[],"package":"pnpm","purl":null,"source":"GHSA-6pfh-p556-v868"},{"ecosystem":"npm","fixed":["10.28.1"],"introduced":["0"],"last_affected":[],"package":"pnpm","purl":"pkg:npm/pnpm","source":"GHSA-6pfh-p556-v868"}],"prev":{"headline":"Group-Office has stored XSS vulnerability via unsanitized filenames","id":"CVE-2026-23887"},"products":["pnpm"],"published":"2026-01-26","related":[{"cvss_score":8.8,"headline":"pnpm: Transitive dependency alias path traversal allows project path override via symlink replacement","id":"CVE-2026-50016","kev_date_added":null,"published":"2026-06-25"},{"cvss_score":8.8,"headline":"pnpm: Project env lockfile can short-circuit package-manager resolution and execute lockfile-selected pnpm bytes","id":"CVE-2026-55698","kev_date_added":null,"published":"2026-06-25"},{"cvss_score":8.8,"headline":"pnpm v10+ Bypass \"Dependency lifecycle scripts execution disabled by default\"","id":"CVE-2025-69264","kev_date_added":null,"published":"2026-01-07"},{"cvss_score":8.8,"headline":"Untrusted Search Path in PNPM","id":"CVE-2022-26183","kev_date_added":null,"published":"2022-03-21"},{"cvss_score":8.2,"headline":"pnpm: Path traversal in configDependencies env lockfile allows symlink creation outside node_modules/.pnpm-config","id":"CVE-2026-59195","kev_date_added":null,"published":"2026-07-06"},{"cvss_score":7.6,"headline":"pnpm vulnerable to Command Injection via environment variable substitution","id":"CVE-2025-69262","kev_date_added":null,"published":"2026-01-07"},{"cvss_score":7.5,"headline":"pnpm: manifest identity spoof satisfies allowBuilds and runs attacker lifecycle","id":"CVE-2026-55487","kev_date_added":null,"published":"2026-06-25"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-01-27","vendors":["pnpm"]},"summary":"Malicious packages can write files outside the extraction directory via path traversal, potentially leading to remote code execution.","url":"https://insights.sbomify.com/CVE-2026-23888/"}