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CVE-2026-62676— Omnigent Guardrail policy bypass: shell-command parser fails open in policies/builtins/_shell.py

Quick assessment

Affected
omnigent-ai omnigent
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Omnigent是omnigent组织的一个 AI 代理框架。 Omnigent 0.3.0之前版本存在输入验证错误漏洞，该漏洞源于共享shell命令解析器无法识别组合解释器标志、timeout、nice、setsid、stdbuf包装器、命令替换及后台控制运算符，可能导致经过身份验证或提示注入的代理推送到未授权仓库或分支，或逃逸预期工作区。

CVSS 7.1 · High EPSS 0.40% · P33

Affected Version Matrix 1

VendorProduct Version RangeStatus
omnigent-ai omnigent < 0.3.0 affected
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I. Basic Information for CVE-2026-62676

Vulnerability Information
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Vulnerability Title
Omnigent Guardrail policy bypass: shell-command parser fails open in policies/builtins/_shell.py
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
不完整的黑名单
Source: CVE Program / CVE List V5
Vulnerability Title
Omnigent 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Omnigent是omnigent组织的一个 AI 代理框架。 Omnigent 0.3.0之前版本存在输入验证错误漏洞，该漏洞源于共享shell命令解析器无法识别组合解释器标志、timeout、nice、setsid、stdbuf包装器、命令替换及后台控制运算符，可能导致经过身份验证或提示注入的代理推送到未授权仓库或分支，或逃逸预期工作区。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
omnigent-ai omnigent < 0.3.0 -

II. Public POCs for CVE-2026-62676

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Reproduced successfully in a real sandbox · Below is the actual recording of building the environment and exploiting the vulnerability.
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claude_code · 8239 chars
GitHub 复现环境（可 clone 直接跑）
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
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III. Intelligence Information for CVE-2026-62676

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Patches & Fixes for CVE-2026-62676 (2)

Vendor Advisories for CVE-2026-62676 (1)

Vendor Pages for CVE-2026-62676 (1)

Same Patch Batch · omnigent-ai · 2026-08-21 · 4 CVEs total

CVE-2026-62674 9.0 CRITICAL Omnigent: Shared Agent Bundle Overwrite Leads to Authenticated Runner RCE
CVE-2026-62675 8.8 HIGH Omnigent: Uploaded Agent Bundle Allows Authenticated Runner RCE via Python Callable Tools
CVE-2026-62677 8.8 HIGH Omnigent: Unvalidated os_env.cwd in agent bundle yields arbitrary host filesystem access o

IV. Related Vulnerabilities

Same product: omnigent
Same vendor: omnigent-ai
Same weakness: CWE-184

V. Comments for CVE-2026-62676

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