Omnigent Guardrail policy bypass: shell-command parser fails open in policies/builtins/_shell.py

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-62676
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-21 18:16:49 UTC
Updated2026-08-21 18:16:49 UTC
DescriptionOmnigent 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.

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

Problem Types: CWE-184 | CWE-184 CWE-184: Incomplete List of Disallowed Inputs

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
3.1CNADECLARED7.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Omnigent-ai Omnigent affected < 0.3.0 Not specified

References

ReferenceSourceLinkTags
github.com/omnigent-ai/omnigent/security/advisories/GHSA-7mqg-cx4g-x2rf [email protected] github.com
github.com/omnigent-ai/omnigent/commit/1a05b7b139ef504bf2be89bf37918abe1... [email protected] github.com
github.com/omnigent-ai/omnigent/releases/tag/v0.3.0 [email protected] github.com
github.com/omnigent-ai/omnigent/pull/389 [email protected] github.com
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