{"answers":{"affected":"3 open source packages ship an affected version, including virtualenv.","exploited":"There is no known exploitation of CVE-2026-113721 in the wild and no public exploit code.","fix":"Upgrade virtualenv to 21.14.9 or later.","what":"CVE-2026-113721 is a medium-severity vulnerability in pypa virtualenv, published on 20 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-113721 and fix it if it is affected.\n\nWhat it is: CVE-2026-113721 is a medium-severity vulnerability in pypa virtualenv, published on 20 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-113721 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- virtualenv (Bitnami): affected all versions; fixed in 21.14.9\n- virtualenv (PyPI): affected all versions; fixed in 21.14.9\n- virtualenv (PyPI): affected all versions; fixed in 21.14.9\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-2026-113721/ (Markdown: https://insights.sbomify.com/CVE-2026-113721/index.md)","id":"CVE-2026-113721","markdown":"https://insights.sbomify.com/CVE-2026-113721/index.md","name":"CVE-2026-113721","record":{"aliases":["AZL-110124","BIT-virtualenv-2026-113721","DEBIAN-CVE-2026-113721","ECHO-06e8-531f-8b53","GHSA-558c-9hv2-4prj","MINI-8v88-356f-hmv8","UBUNTU-CVE-2026-113721"],"analysis":null,"analysis_generated_by":null,"assigner":"GitHub_M","cpe":[],"cvss":{"score":4.5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L","version":"3.1"},"cwes":[{"id":"CWE-59","name":"Improper Link Resolution Before File Access"}],"description":"virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.9, ViaTemplateActivator._generate() removes an existing output only when Path.exists() is true, allowing a dangling symlink to survive and redirect generated activation content, while PyEnvCfg.write() opens pyvenv.cfg without first replacing an existing symbolic or hard link. Another local account that prepares final entries inside the destination can therefore cause environment creation to create or overwrite files outside the requested tree with constrained virtualenv-generated content and the invoking user's permissions. The destination parent must remain controlled by the environment owner during creation; concurrent parent-directory replacement is a separate concern. This issue is fixed in version 21.14.9.","ecosystems":["Bitnami","PyPI"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"virtualenv: Generated files can follow existing destination links","id":"CVE-2026-113721","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":null,"products":[],"type":null,"year":"2026"},"n_packages":3,"n_references":4,"next":{"headline":"virtualenv: Generated POSIX console launchers interpret destination paths as shell syntax","id":"CVE-2026-113722"},"packages":[{"ecosystem":"Bitnami","fixed":["21.14.9"],"introduced":["0"],"last_affected":[],"package":"virtualenv","purl":"pkg:bitnami/virtualenv","source":"BIT-virtualenv-2026-113721"},{"ecosystem":"PyPI","fixed":["21.14.9"],"introduced":["0"],"last_affected":[],"package":"virtualenv","purl":null,"source":"GHSA-558c-9hv2-4prj"},{"ecosystem":"PyPI","fixed":["21.14.9"],"introduced":["0"],"last_affected":[],"package":"virtualenv","purl":"pkg:pypi/virtualenv","source":"GHSA-558c-9hv2-4prj"}],"prev":{"headline":"virtualenv: Seeded files retain permissions from an older cache","id":"CVE-2026-113720"},"products":["virtualenv"],"published":"2026-10-20","related":[],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"Bitnami","prefix":"BIT"},{"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":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-28","vendors":["pypa"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-113721/"}