{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-9354 exists.","fix":"No fix has been published for CVE-2026-9354 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-9354 is a medium-severity cross-site scripting vulnerability in NousResearch hermes-agent, published on 24 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-9354 and fix it if it is affected.\n\nWhat it is: CVE-2026-9354 is a medium-severity cross-site scripting vulnerability in NousResearch hermes-agent, published on 24 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-9354 exists.\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-2026-9354/ (Markdown: https://insights.sbomify.com/CVE-2026-9354/index.md)","id":"CVE-2026-9354","markdown":"https://insights.sbomify.com/CVE-2026-9354/index.md","name":"CVE-2026-9354","record":{"aliases":["GHSA-7pxq-5rjc-m2wr"],"analysis":{"component_type":"library","fix_type":"no_fix_stated","impacts":["code_execution","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"AI agent library","requires_auth":"none","summary":"Remote attackers can inject malicious scripts via the format_message argument in the Slack or Mattermost agent, potentially leading to code execution.","user_interaction":"not_required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulDB","cpe":[],"cvss":{"score":6.9,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:P","version":"4.0"},"cwes":[{"id":"CWE-74","name":"Improper Neutralization of Special Elements in Output Used by a Downstream Component"},{"id":"CWE-116","name":"Improper Encoding or Escaping of Output"}],"description":"A vulnerability was detected in NousResearch hermes-agent up to 2026.4.16. The affected element is an unknown function of the component Slack Agent/Mattermost Agent. The manipulation of the argument format_message results in escaping of output. The attack can be executed remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":null,"headline":"NousResearch hermes-agent Slack Agent/Mattermost Agent escape output","id":"CVE-2026-9354","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2026"},"n_packages":0,"n_references":4,"next":{"headline":"SourceCodester Hospitals Patient Records Management System Master.php save_patient_history sql injection","id":"CVE-2026-9355"},"packages":[],"prev":{"headline":"NousResearch hermes-agent Skills Guard Multi-Word Prompt skills_guard.py injection","id":"CVE-2026-9353"},"products":["hermes-agent"],"published":"2026-05-24","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":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-27","vendors":["NousResearch"]},"summary":"Remote attackers can inject malicious scripts via the format_message argument in the Slack or Mattermost agent, potentially leading to code execution.","url":"https://insights.sbomify.com/CVE-2026-9354/"}