{"id":"CVE-2026-62676","summary":"Omnigent Guardrail policy bypass: shell-command parser fails open in policies/builtins/_shell.py","details":"Omnigent is an open-source AI agent framework and meta-harness for orchestrating coding agents. Prior to 0.3.0, the shared shell-command parser in omnigent/policies/builtins/_shell.py fails to recognize combined interpreter flags, the timeout, nice, setsid, and stdbuf wrappers, command substitutions, and a single background control operator. A gated git push or gh write hidden with these forms produces no parsed operation, causing the github.py write_repos and write_branches allowlist and the working_dir.py workspace confinement policies to abstain and allow the command. An authenticated or prompt-injected agent can therefore push to an unauthorized repository or branch or escape the intended workspace. This issue is fixed in version 0.3.0.","aliases":["GHSA-7mqg-cx4g-x2rf","PYSEC-2026-3873"],"modified":"2026-09-10T12:25:30.446854519Z","published":"2026-08-21T17:42:21.563Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-184"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/62xxx/CVE-2026-62676.json"},"references":[{"type":"WEB","url":"https://github.com/omnigent-ai/omnigent/releases/tag/v0.3.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/62xxx/CVE-2026-62676.json"},{"type":"ADVISORY","url":"https://github.com/omnigent-ai/omnigent/security/advisories/GHSA-7mqg-cx4g-x2rf"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-62676"},{"type":"FIX","url":"https://github.com/omnigent-ai/omnigent/commit/1a05b7b139ef504bf2be89bf37918abe104fb95c"},{"type":"FIX","url":"https://github.com/omnigent-ai/omnigent/pull/389"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/omnigent-ai/omnigent","events":[{"introduced":"0"},{"fixed":"1a05b7b139ef504bf2be89bf37918abe104fb95c"},{"fixed":"4edb4d95b95fd2748f3f119628936d75511918e9"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"0"},{"fixed":"0.3.0"}]}}],"versions":["v0.3.0rc1","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-62676.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N"}]}