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CVE-2026-85242— Server-Side Request Forgery via Favicon Redirect to Local Network Resources in PlaywrightCapture

Quick assessment

Affected
Lookyloo PlaywrightCapture
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.

PlaywrightCapture 的 favicon 获取功能中存在一个服务端请求伪造（SSRF）漏洞。当 选项被启用时，应用会对初始 favicon URL 进行验证，以防止向 localhost、环回地址（loopback）或其他非公共网络地址发起请求。然而，aiohttp 所跟随的重定向请求并未受到同样的验证。 能够影响由 PlaywrightCapture 处理的页面内容的攻击者，可以指定一个可从公网访问的 favicon URL，该 URL 会返回一个指向本地地址（如 127.0.0.1、localho

CVSS 6.9 · Medium

Affected Version Matrix 1

VendorProduct Version RangeStatus
Lookyloo PlaywrightCapture < v1.41.2 affected
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I. Basic Information for CVE-2026-85242

Vulnerability Information
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Vulnerability Title
Server-Side Request Forgery via Favicon Redirect to Local Network Resources in PlaywrightCapture
Source: CVE Program / CVE List V5
Vulnerability Description
PlaywrightCapture contains a server-side request forgery (SSRF) vulnerability in its favicon retrieval functionality. When only_global_lookup is enabled, the application validates the initial favicon URL to prevent requests to localhost, loopback, or other non-public network addresses. However, redirects followed by aiohttp were not subjected to the same validation. An attacker able to influence the content of a page processed by PlaywrightCapture could specify a publicly reachable favicon URL that responds with an HTTP redirect to a local or otherwise restricted address, such as 127.0.0.1, localhost, or an internal network service. Because aiohttp automatically followed the redirect, the resulting request could bypass the application's local-address restrictions and cause the PlaywrightCapture host to issue HTTP requests to resources that should not be externally reachable. Depending on the services reachable from the PlaywrightCapture host and how retrieved favicon data is subsequently exposed or processed, this could be used to probe internal HTTP services or potentially obtain information from otherwise inaccessible endpoints. The patch introduces an aiohttp request middleware that applies the existing local-URL validation to every request in the redirect chain. Requests resolving to restricted/local destinations are rejected before they are issued.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Lookyloo PlaywrightCapture 0 ~ v1.41.2 -

II. Public POCs for CVE-2026-85242

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III. Intelligence Information for CVE-2026-85242

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Patches & Fixes for CVE-2026-85242 (1)

IV. Related Vulnerabilities

Same product: PlaywrightCapture
Same vendor: Lookyloo
Same weakness: CWE-918

V. Comments for CVE-2026-85242

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