{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-100864 exists.","fix":"No fix has been published for CVE-2026-100864 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-100864 is a high-severity code injection vulnerability in heymrun heym, published on 27 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-100864 and fix it if it is affected.\n\nWhat it is: CVE-2026-100864 is a high-severity code injection vulnerability in heymrun heym, published on 27 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-100864 exists.\n\nAffected product: heymrun heym. 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-2026-100864/ (Markdown: https://insights.sbomify.com/CVE-2026-100864/index.md)","id":"CVE-2026-100864","markdown":"https://insights.sbomify.com/CVE-2026-100864/index.md","name":"CVE-2026-100864","record":{"aliases":["GHSA-87x2-9jwx-7gh4","GHSA-gxgj-2794-2q5v"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Python workflow library","requires_auth":"low_privilege","summary":"Authenticated attackers can execute arbitrary Python code via sandbox escape in the expression engine of the heym library.","user_interaction":"not_required","vuln_class":"code_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":8.7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-94","name":"Improper Control of Generation of Code"}],"description":"heym before 0.0.91 contains a sandbox escape vulnerability in the expression engine's DotList map/filter and fallback resolver that allows authenticated users to execute arbitrary Python code. Attackers can craft workflow expressions using dunder attribute access through item expressions or the fallback resolver to access os.system and execute commands as the backend process.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":false,"headline":"heym before 0.0.91 Remote Code Execution via Expression Engine","id":"CVE-2026-100864","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"code_injection","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"Heym before 0.0.53 Remote Code Execution via eval() Sandbox Escape","id":"CVE-2026-100865"},"packages":[],"prev":{"headline":"Heym before 0.0.91 SSRF via image fetching and IPv6 validation","id":"CVE-2026-100863"},"products":["heym"],"published":"2026-09-27","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":"no","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-09-28","vendors":["heymrun"]},"summary":"Authenticated attackers can execute arbitrary Python code via sandbox escape in the expression engine of the heym library.","url":"https://insights.sbomify.com/CVE-2026-100864/"}