Stirling-Tools Stirling-PDF URL PDF Conversion Endpoint ConvertWebsiteToPDF.java server-side request forgery

Summaryinfo

A vulnerability marked as critical has been reported in Stirling-Tools Stirling-PDF. This affects an unknown part of the file ConvertWebsiteToPDF.java of the component URL PDF Conversion Endpoint. The manipulation leads to server-side request forgery. This vulnerability is documented as CVE-2026-71270. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Stirling-Tools Stirling-PDF (the affected version is unknown). This issue affects an unknown code of the file ConvertWebsiteToPDF.java of the component URL PDF Conversion Endpoint. The manipulation with an unknown input leads to a server-side request forgery vulnerability. Using CWE to declare the problem leads to CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Stirling-PDF's POST /api/v1/convert/url/pdf endpoint (ConvertWebsiteToPDF.java) was not updated with the CustomHtmlSanitizer/SsrfProtectionService SSRF protections that were added to three sibling conversion endpoints (html/pdf, file/pdf, markdown/pdf). The endpoint validates only that the initial requested URL resolves to a public IP, then fetches the page's HTML server-side and hands it, unsanitized, to a WeasyPrint subprocess. Embedded resource references in the fetched HTML (e.g. `<img src="http://169.254.169.254/...">`) are fetched by WeasyPrint with no per-resource SSRF filtering, allowing an attacker-controlled page to cause the server to retrieve cloud metadata endpoints or internal network resources and leak their contents back into the generated PDF.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-71270 since 08/05/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/05/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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• Stirling-Tools

Name

• Stirling-PDF

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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