{"answers":{"affected":"3 open source packages ship an affected version, including monai. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-100846 exists.","fix":"Upgrade monai to a fixed version for your release line: 1.5.2 or 1.6.0.","what":"CVE-2026-100846 is a high-severity unsafe deserialization vulnerability in Project-MONAI MONAI, published on 27 Sep 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-100846 and fix it if it is affected.\n\nWhat it is: CVE-2026-100846 is a high-severity unsafe deserialization vulnerability in Project-MONAI MONAI, published on 27 Sep 2026. An attacker needs administrator access to exploit it, 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-2026-100846 exists.\n\nAffected packages and fixed versions:\n- monai (PyPI): affected all versions; fixed in 1.5.2\n- monai (PyPI): affected all versions; fixed in 1.6.0\n- monai (PyPI): affected all versions; fixed in 1.6.0\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-2026-100846/ (Markdown: https://insights.sbomify.com/CVE-2026-100846/index.md)","id":"CVE-2026-100846","markdown":"https://insights.sbomify.com/CVE-2026-100846/index.md","name":"CVE-2026-100846","record":{"aliases":["GHSA-89gg-p5r5-q6r4","GHSA-cvqf-4876-w239","PYSEC-2026-4021"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"MONAI Python library","requires_auth":"high_privilege","summary":"Attackers can execute arbitrary code by supplying malicious pickle files to the algo_from_pickle function in MONAI.","user_interaction":"required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[{"product":"monai","vendor":"project-monai"}],"cvss":{"score":8.8,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","version":"4.0"},"cwes":[{"id":"CWE-502","name":"Deserialization of Untrusted Data"}],"description":"MONAI before 1.5.2 contains a deserialization of untrusted data vulnerability in the algo_from_pickle function in monai/auto3dseg/utils.py. The function reads a .pkl file and passes its contents to pickle.loads without validating the data source or content. If an application invokes algo_from_pickle on an attacker-supplied pickle file, an object defining __reduce__ is executed during deserialization, resulting in arbitrary code execution in the context of the application.","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":"MONAI before 1.5.2 Remote Code Execution via Pickle Deserialization","id":"CVE-2026-100846","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"deserialization","year":"2026"},"n_packages":3,"n_references":2,"next":{"headline":"AzuraCast before 0.23.8 DQL Injection via sortOrder","id":"CVE-2026-100847"},"packages":[{"ecosystem":"PyPI","fixed":["1.5.2"],"introduced":["0"],"last_affected":[],"package":"monai","purl":"pkg:pypi/monai","source":"PYSEC-2026-4021"},{"ecosystem":"PyPI","fixed":["1.6.0"],"introduced":["0"],"last_affected":[],"package":"monai","purl":null,"source":"GHSA-89gg-p5r5-q6r4"},{"ecosystem":"PyPI","fixed":["1.6.0"],"introduced":["0"],"last_affected":[],"package":"monai","purl":"pkg:pypi/monai","source":"GHSA-89gg-p5r5-q6r4"}],"prev":{"headline":"MONAI before 1.6.0 Remote Code Execution via NumpyReader","id":"CVE-2026-100845"},"products":["MONAI"],"published":"2026-09-27","related":[{"cvss_score":8.6,"headline":"MONAI before 1.6.0 OS Command Injection via dataset_name_or_id","id":"CVE-2026-100844","kev_date_added":null,"published":"2026-09-27"},{"cvss_score":8.5,"headline":"MONAI through 1.6.0 Remote Code Execution via bundle configuration","id":"CVE-2026-100840","kev_date_added":null,"published":"2026-09-27"},{"cvss_score":8.5,"headline":"MONAI through 1.6.0 PersistentDataset Remote Code Execution via Pickle Cache","id":"CVE-2026-100841","kev_date_added":null,"published":"2026-09-27"},{"cvss_score":8.5,"headline":"MONAI before 1.6.0 Remote Code Execution via algo_from_pickle","id":"CVE-2026-100843","kev_date_added":null,"published":"2026-09-27"},{"cvss_score":8.5,"headline":"MONAI before 1.6.0 Remote Code Execution via NumpyReader","id":"CVE-2026-100845","kev_date_added":null,"published":"2026-09-27"},{"cvss_score":7.3,"headline":"MONAI through 1.6.0 _get_fake_spatial_shape eval() Sandbox Bypass via Attribute Chains","id":"CVE-2026-100842","kev_date_added":null,"published":"2026-09-27"}],"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":"2026-10-08","vendors":["Project-MONAI"]},"summary":"Attackers can execute arbitrary code by supplying malicious pickle files to the algo_from_pickle function in MONAI.","url":"https://insights.sbomify.com/CVE-2026-100846/"}