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CVE-2026-14620— webpack-dev-server vulnerable to cross-site request forgery via internal developer endpoints

Quick assessment

Affected
webpack-dev-server webpack-dev-server
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.

webpack-dev-server webpack-dev-server是webpack-dev-server的开发服务器。 webpack-dev-server 5.2.5及之前版本存在安全漏洞，该漏洞源于暴露内部开发者端点，未验证请求来源，可能允许攻击者跨域触发，打开开发者编辑器内的任意本地文件，包括项目根目录外的文件，并通过重复请求生成编辑器进程和强制重新编译，从而降低开发者机器的性能。

CVSS 4.7 · Medium EPSS 0.52% · P42

Public Exploits 1

ExploitDB · 1 EDB-52649 [webapps]

Affected Version Matrix 2

VendorProduct Version RangeStatus
webpack-dev-server webpack-dev-server < 5.2.6 affected
5.2.6 unaffected
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I. Basic Information for CVE-2026-14620

Vulnerability Information
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Vulnerability Title
webpack-dev-server vulnerable to cross-site request forgery via internal developer endpoints
Source: CVE Program / CVE List V5
Vulnerability Description
webpack-dev-server versions 5.2.5 and earlier expose two internal developer endpoints, /webpack-dev-server/open-editor and /webpack-dev-server/invalidate, that perform state-changing actions on any GET request without verifying that the request originated from the dev server's own page. Any website a developer visits while the dev server is running can trigger these endpoints cross-origin with no interaction beyond the visit. An attacker can open an arbitrary existing local file in the developer's editor, including files outside the project root, and repeated requests can spawn editor processes and force recompilations that degrade the developer's machine. Patches: upgrade to webpack-dev-server 5.2.6. Workarounds: none.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
跨站请求伪造(CSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
webpack-dev-server 跨站请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
webpack-dev-server webpack-dev-server是webpack-dev-server的开发服务器。 webpack-dev-server 5.2.5及之前版本存在安全漏洞，该漏洞源于暴露内部开发者端点，未验证请求来源，可能允许攻击者跨域触发，打开开发者编辑器内的任意本地文件，包括项目根目录外的文件，并通过重复请求生成编辑器进程和强制重新编译，从而降低开发者机器的性能。
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
webpack-dev-server webpack-dev-server 0 ~ 5.2.6 -

II. Public POCs for CVE-2026-14620

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III. Intelligence Information for CVE-2026-14620

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Vendor Advisories for CVE-2026-14620 (1)

IV. Related Vulnerabilities

Same product: webpack-dev-server
Same vendor: webpack-dev-server
Same weakness: CWE-352

V. Comments for CVE-2026-14620

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