CVE-2026-116367— DeepSeek Harness sandbox.ts createContext

Quick assessment

Affected

DeepSeek Harness

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 DeepSeek Harness（版本 0.1.0-rc.5 及更早版本）中发现了一个安全漏洞。该漏洞位于文件中的函数，攻击者可通过操纵该函数引发沙箱问题。此漏洞可被远程利用。漏洞披露方已提前联系厂商，但未收到任何回应。

CVSS 6.3 · Medium EPSS 0.29% · P22 Updated Oct 26, 2026

Possible ATT&CK Techniques 2 AI

T1055 · Process Injection T1190 · Exploit Public-Facing Application

Affected Version Matrix 6

Vendor	Product	Version Range	Status
DeepSeek	Harness	`0.1.0-rc.0`	affected
		`0.1.0-rc.1`	affected
		`0.1.0-rc.2`	affected
		`0.1.0-rc.3`	affected
		`0.1.0-rc.4`	affected
		`0.1.0-rc.5`	affected

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Vulnerability Information

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Vulnerability Title

DeepSeek Harness sandbox.ts createContext

Source: CVE Program / CVE List V5

Vulnerability Description

A vulnerability was found in DeepSeek Harness up to 0.1.0-rc.5. This vulnerability affects the function createContext of the file packages/extensions/cordis-host-runner/src/sandbox.ts. The manipulation results in sandbox issue. It is possible to launch the attack remotely. The vendor was contacted early about this disclosure but did not respond in any way.

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

权限/沙箱问题

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
DeepSeek	Harness	0.1.0-rc.0	`cpe:2.3:a:deepseek:harness::::::::`

II. Public POCs for CVE-2026-116367

#	POC Description	Source Link	Shenlong Link

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No public POC found.

III. Intelligence Information for CVE-2026-116367

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https://www.cve.org/CVERecord?id=CVE-2026-116367

IV. Related Vulnerabilities

Same product: Harness

Same vendor: DeepSeek

Same weakness: CWE-265