{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-77156 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-77156 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-77156 is a medium-severity vulnerability in github.com/checkmarx/ast-cli, published on 22 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-77156 and fix it if it is affected.\n\nWhat it is: CVE-2026-77156 is a medium-severity vulnerability in github.com/checkmarx/ast-cli, published on 22 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-77156 in the wild and no public exploit code.\n\nAffected product: github.com/checkmarx/ast-cli. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2026-77156/ (Markdown: https://insights.sbomify.com/CVE-2026-77156/index.md)","id":"CVE-2026-77156","markdown":"https://insights.sbomify.com/CVE-2026-77156/index.md","name":"CVE-2026-77156","record":{"aliases":["GHSA-9gff-3q53-q75x"],"analysis":null,"analysis_generated_by":null,"assigner":"Checkmarx","cpe":[],"cvss":{"score":6.3,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H","version":"4.0"},"cwes":[{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory"}],"description":"Incomplete validation of extracted archive entry paths in ast-cli's tar extraction logic on Linux and macOS (used when installing the Vorpal ASCA real-time engine and the SCA Resolver) would allow a malicious tar archive containing absolute or traversal path entries to write files outside the install directory. Windows builds were not affected, as the Windows extractor performs this path validation.\n\nExploitation required substituting the archive served at \"download.checkmarx.com\". An attacker able to compromise that server and replace the archive could write arbitrary, executable files to arbitrary filesystem paths via this path traversal.\n\nExtraction now validates that each entry's destination path resolves within the working directory and rejects absolute paths.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"ast-cli: Path traversal in tar extraction on Linux/macOS allows writes outside the install directory","id":"CVE-2026-77156","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":null,"year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"ast-cli: Auto-update downloads are not verified against a checksum before execution","id":"CVE-2026-77157"},"packages":[],"prev":{"headline":"lin-snow Ech0 crypto.go MD5Encrypt risky encryption","id":"CVE-2026-77151"},"products":["github.com/checkmarx/ast-cli"],"published":"2026-10-22","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-10-22","vendors":["Checkmarx"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-77156/"}