CVE-2026-66065

Arbitrary command execution via auto-loaded repository configuration

Published Aug 3, 2026 · Updated Aug 3, 2026

Code injection in Q00 Ouroboros before 0.42.1 allows attackers to execute arbitrary commands through auto-loaded repository configuration. The configuration loader trusts omitted execution-routing keys from a repository .env, while the MCP bridge also spawns commands from an automatically discovered repository roster. Exploitation requires a user to clone an attacker-controlled repository and run Ouroboros inside it, granting the commands that user's host privileges.

CVSS severity8.4
High
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in Q00 Ouroboros before 0.42.1 allows attackers to execute arbitrary commands through auto-loaded repository configuration. The configuration loader trusts omitted execution-routing keys from a repository .env, while the MCP bridge also spawns commands from an automatically discovered repository roster. Exploitation requires a user to clone an attacker-controlled repository and run Ouroboros inside it, granting the commands that user's host privileges.

The record

CVE
CVE-2026-66065
Published
Aug 3, 2026
Updated
Aug 3, 2026
Vendor
Q00
Product
Ouroboros
Classifications
CWE-15, CWE-94, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.42.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Q00 · Ouroborosversion=< 0.42.1

Published CVSS scores

8.4GitHubCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-15External Control of System or Configuration Setting
CWE-94Improper Control of Generation of Code ('Code Injection')
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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