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CVE-2026-86273— projeto-siga HTML-to-PDF Endpoint ExUtilController.java DownloadExterno.getUrl server-side request forgery

Quick assessment

Affected
projeto-siga siga
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.

在 projeto-siga siga 的 11.1.1 及更早版本中发现了一个安全弱点。该问题影响位于 文件中的 函数，该函数属于 HTML-to-PDF Endpoint 组件。对参数 的操纵可能导致 服务端请求伪造（SSRF, Server-Side Request Forgery）。该攻击可以远程发起。该漏洞的利用方式已经公开，可被用于实际攻击。项目方通过问题报告早期得知了此问题，但截至目前尚未作出回应。

CVSS 7.3 · High

Possible ATT&CK Techniques 1 AI

T1090 · Proxy
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I. Basic Information for CVE-2026-86273

Vulnerability Information
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Vulnerability Title
projeto-siga HTML-to-PDF Endpoint ExUtilController.java DownloadExterno.getUrl server-side request forgery
Source: CVE Program / CVE List V5
Vulnerability Description
A weakness has been identified in projeto-siga siga up to 11.1.1. Affected by this issue is the function DownloadExterno.getUrl of the file sigaex/src/main/java/br/gov/jfrj/siga/vraptor/ExUtilController.java of the component HTML-to-PDF Endpoint. This manipulation of the argument html causes server-side request forgery. The attack may be initiated remotely. The exploit has been made available to the public and could be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
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
projeto-siga siga 11.1.0 cpe:2.3:a:projeto-siga:siga:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-86273

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-86273

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Proof of Concept for CVE-2026-86273 (1)

Other References for CVE-2026-86273 (3)

IV. Related Vulnerabilities

Same product: siga
Same vendor: projeto-siga
Same weakness: CWE-918

V. Comments for CVE-2026-86273

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