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.
Published: 2026-09-03
Score: 6.9 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

PlaywrightCapture contains a server‑side request forgery vulnerability in its favicon retrieval path. When only_global_lookup is enabled, the tool accepts a publicly reachable favicon URL, follows an HTTP redirect via aiohttp, and does not re‑validate the target of the redirect. This allows an attacker to cause the PlaywrightCapture host to send HTTP requests to addresses that should be blocked, such as 127.0.0.1, localhost, or other internal services. The result is that internal endpoints may be probed or data from those services may be exposed to the attacker.

Affected Systems

The affected product is Lookyloo’s PlaywrightCapture. No specific version information is present in this CVE entry; the issue exists in any code base that has not applied the commit referenced, which introduces a middleware to reject redirects to local addresses.

Risk and Exploitability

The severity, as indicated by a CVSS score of 6.9, reflects a moderate risk. Because the EPSS score is unavailable and the vulnerability is not listed in the CISA KEV catalog, a clear exploitation trend is not evident, but the SSRF scenario is feasible if an attacker can influence the page content that PlaywrightCapture processes. The exploitation would require the attacker to supply a crafted favicon URL that redirects to a restricted address; no additional system credentials or privileges are needed.

Generated by OpenCVE AI on September 3, 2026 at 20:47 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Upgrade PlaywrightCapture to the commit that implements aiohttp middleware validating redirect targets, ensuring that any request chain is checked against a local‑address blacklist.
  • Until an upgrade is available, disable the favicon retrieval feature or turn off only_global_lookup in the configuration so that PlaywrightCapture no longer follows external redirects.
  • Add network‑level controls that restrict outbound connections from the PlaywrightCapture host to internal networks, limiting the potential impact of any unfiltered SSRF traffic.

Generated by OpenCVE AI on September 3, 2026 at 20:47 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Thu, 03 Sep 2026 18:30:00 +0000

Type Values Removed Values Added
First Time appeared Lookyloo
Lookyloo playwrightcapture
Vendors & Products Lookyloo
Lookyloo playwrightcapture
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 03 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
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.
Title Server-Side Request Forgery via Favicon Redirect to Local Network Resources in PlaywrightCapture
Weaknesses CWE-918
References
Metrics cvssV4_0

{'score': 6.9, 'vector': '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'}


Subscriptions

Lookyloo Playwrightcapture
cve-icon MITRE

Status: PUBLISHED

Assigner: CIRCL

Published:

Updated: 2026-09-03T17:37:23.492Z

Reserved: 2026-09-03T16:17:17.294Z

Link: CVE-2026-85242

cve-icon Vulnrichment

Updated: 2026-09-03T17:37:19.259Z

cve-icon NVD

Status : Received

Published: 2026-09-03T17:17:30.177

Modified: 2026-09-03T18:17:34.127

Link: CVE-2026-85242

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-03T21:00:12Z

Weaknesses
  • CWE-918

    Server-Side Request Forgery (SSRF)