Description
knowns versions before 0.31.0 fail to properly validate the x-opencode-directory request header in the /api/opencode proxy endpoint. Remote attackers can supply arbitrary directory paths to execute file operations outside the project root on the host system.
Published: 2026-09-10
Score: 9.3 Critical
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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Advisories

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History

Thu, 10 Sep 2026 15:45:00 +0000

Type Values Removed Values Added
Description knowns versions before 0.31.0 fail to properly validate the x-opencode-directory request header in the /api/opencode proxy endpoint. Remote attackers can supply arbitrary directory paths to execute file operations outside the project root on the host system.
Title knowns before 0.31.0 External Control of Agent Working Directory via x-opencode-directory Header
Weaknesses CWE-73
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Subscriptions

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-10T15:28:51.729Z

Reserved: 2026-09-10T11:28:50.297Z

Link: CVE-2026-88899

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-10T16:18:12.120

Modified: 2026-09-10T16:18:12.120

Link: CVE-2026-88899

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses
  • CWE-73

    External Control of File Name or Path