CVE-2026-85242
MediumCVSS 6.9Summary
PlaywrightCapture contains a Server-Side Request Forgery (SSRF) vulnerability in its favicon retrieval functionality. When only_global_lookup is enabled, URL validation does not cover redirects followed by aiohttp, allowing bypass of restrictions and access to local resources.
Risk Assessment
An attacker can exploit this vulnerability to send HTTP requests to internal services such as localhost or internal network addresses, potentially leading to network scanning, data exfiltration, or privilege escalation.
Recommendation
Apply the patch that introduces an aiohttp request middleware to validate every URL in the redirect chain and block requests to restricted destinations.
Other vulnerabilities in PlaywrightCapture
See all- CVE-2026-44439High
Prior to version 1.39.6, PlaywrightCapture did not sufficiently restrict navigations and resource requests initiated by rendered pages. An attacker-controlled page could exploit redirection mechanisms to open file:// URLs or request resources from private IP addresses.
- CVE-2026-63175High
The vulnerability in PlaywrightCapture stores capture-specific configuration and runtime data as mutable class-level variables instead of instance-level variables. This causes multiple Capture objects in the same Python process to share state, including HTTP headers, cookies, credentials, and captured request data.
Original NVD description (English source)
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.