{"answers":{"affected":"3 open source packages ship an affected version, including bentoml. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-27905 exists.","fix":"Upgrade bentoml to 1.4.36 or later.","what":"CVE-2026-27905 is a high-severity path traversal vulnerability in BentoML, published on 3 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-27905 and fix it if it is affected.\n\nWhat it is: CVE-2026-27905 is a high-severity path traversal vulnerability in BentoML, published on 3 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-27905 exists.\n\nAffected packages and fixed versions:\n- bentoml (PyPI): affected all versions; fixed in 1.4.36\n- bentoml (PyPI): affected all versions; fixed in 1.4.36\n- bentoml (PyPI): affected all versions; fixed in 1.4.36\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-2026-27905/ (Markdown: https://insights.sbomify.com/CVE-2026-27905/index.md)","id":"CVE-2026-27905","markdown":"https://insights.sbomify.com/CVE-2026-27905/index.md","name":"CVE-2026-27905","record":{"aliases":["GHSA-m6w7-qv66-g3mf","PYSEC-2026-2398"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution","data_modify"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Python AI serving library","requires_auth":"none","summary":"Attackers can achieve arbitrary file write on the host by exploiting symlink validation flaws in tar extraction, potentially leading to code execution.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"bentoml","vendor":"bentoml"}],"cvss":{"score":8.6,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-59","name":"Improper Link Resolution Before File Access"}],"description":"BentoML is a Python library for building online serving systems optimized for AI apps and model inference. Prior to 1.4.36, the safe_extract_tarfile() function validates that each tar member's path is within the destination directory, but for symlink members it only validates the symlink's own path, not the symlink's target. An attacker can create a malicious bento/model tar file containing a symlink pointing outside the extraction directory, followed by a regular file that writes through the symlink, achieving arbitrary file write on the host filesystem. This vulnerability is fixed in 1.4.36.","ecosystems":["PyPI"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"BentoML has an Arbitrary File Write via Symlink Path Traversal in Tar Extraction","id":"CVE-2026-27905","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"path_traversal","year":"2026"},"n_packages":3,"n_references":2,"next":{"headline":"Windows Hello Security Feature Bypass Vulnerability","id":"CVE-2026-27906"},"packages":[{"ecosystem":"PyPI","fixed":["1.4.36"],"introduced":["0"],"last_affected":[],"package":"bentoml","purl":null,"source":"GHSA-m6w7-qv66-g3mf"},{"ecosystem":"PyPI","fixed":["1.4.36"],"introduced":["0"],"last_affected":[],"package":"bentoml","purl":"pkg:pypi/bentoml","source":"GHSA-m6w7-qv66-g3mf"},{"ecosystem":"PyPI","fixed":["1.4.36"],"introduced":["0"],"last_affected":[],"package":"bentoml","purl":"pkg:pypi/bentoml","source":"PYSEC-2026-2398"}],"prev":{"headline":"minimatch ReDoS: nested *() extglobs generate catastrophically backtracking regular expressions","id":"CVE-2026-27904"},"products":["BentoML"],"published":"2026-03-03","related":[{"cvss_score":9.9,"headline":"BentoML is Vulnerable to an SSRF Attack Through File Upload Processing","id":"CVE-2025-54381","kev_date_added":null,"published":"2025-07-29"},{"cvss_score":9.8,"headline":"Insecure Deserialization leads to RCE in BentoML's runner server","id":"CVE-2025-32375","kev_date_added":null,"published":"2025-04-09"},{"cvss_score":9.8,"headline":"BentoML Allows Remote Code Execution (RCE) via Insecure Deserialization","id":"CVE-2025-27520","kev_date_added":null,"published":"2025-04-04"},{"cvss_score":8.8,"headline":"BentoML: Dockerfile command injection via docker.base_image","id":"CVE-2026-44345","kev_date_added":null,"published":"2026-05-27"},{"cvss_score":8.8,"headline":"BentoML: Dockerfile command injection via envs[*].name in bentofile.yaml","id":"CVE-2026-44346","kev_date_added":null,"published":"2026-05-27"},{"cvss_score":8.8,"headline":"BentoML has a Server-Side Template Injection via unsandboxed Jinja2 Environment in Dockerfile generation","id":"CVE-2026-35044","kev_date_added":null,"published":"2026-04-06"}],"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":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"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":"total"},"state":"PUBLISHED","updated":"2026-03-04","vendors":["bentoml"]},"summary":"Attackers can achieve arbitrary file write on the host by exploiting symlink validation flaws in tar extraction, potentially leading to code execution.","url":"https://insights.sbomify.com/CVE-2026-27905/"}