{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-82021 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-82021 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-82021 is a critical vulnerability in NousResearch hermes-agent, published on 28 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-82021 and fix it if it is affected.\n\nWhat it is: CVE-2026-82021 is a critical vulnerability in NousResearch hermes-agent, published on 28 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-82021 in the wild and no public exploit code.\n\nAffected product: NousResearch hermes-agent. 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-2026-82021/ (Markdown: https://insights.sbomify.com/CVE-2026-82021/index.md)","id":"CVE-2026-82021","markdown":"https://insights.sbomify.com/CVE-2026-82021/index.md","name":"CVE-2026-82021","record":{"aliases":["GHSA-w9gw-vgmg-q67h"],"analysis":{"component_type":"developer_tool","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Hermes Agent","requires_auth":"none","summary":"Remote attackers can execute arbitrary code on hosts installing the Hermes Agent MCP catalog by compromising an upstream repository referenced via a mutable branch.","user_interaction":"required","vuln_class":"supply_chain"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":9,"severity":"critical","source":"cna","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","version":"4.0"},"cwes":[{"id":"CWE-494","name":"Download of Code Without Integrity Check"}],"description":"Hermes Agent 0.18.2 prior to 0.19.0 contains a supply chain vulnerability in its bundled MCP catalog that allows a remote attacker to execute arbitrary code by compromising a third-party upstream repository referenced via a mutable branch rather than a pinned commit SHA. An attacker who compromises the upstream repository can propagate malicious code to every host that installs the affected catalog entry, with no further action required by the operator.","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":"Hermes Agent 0.18.2 \u003c 0.19.0 MCP Catalog Supply Chain RCE via Mutable Branch Reference","id":"CVE-2026-82021","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"supply_chain","year":"2026"},"n_packages":0,"n_references":4,"next":{"headline":"LearnPress WordPress Plugin \u003c 4.4.6 Broken Object-Level Authorization via Quiz Answer Insert","id":"CVE-2026-82023"},"packages":[],"prev":{"headline":"Hermes Agent 0.16.0 \u003c 0.17.0 Credential Store Overwrite via File-Write Tool","id":"CVE-2026-82020"},"products":["hermes-agent"],"published":"2026-08-28","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":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-08-31","vendors":["NousResearch"]},"summary":"Remote attackers can execute arbitrary code on hosts installing the Hermes Agent MCP catalog by compromising an upstream repository referenced via a mutable branch.","url":"https://insights.sbomify.com/CVE-2026-82021/"}