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CVE-2026-103087

Quick assessment

Affected
gosub-io gosub-engine
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.

Gosub 浏览器引擎（gosub-engine）在 0.1.0 版本及 commit 46868b3 之前的 main 分支中存在不受控制的递归问题。攻击者可通过包含大量深度嵌套元素的 SVG 文档，导致拒绝服务（栈溢出和应用程序崩溃）。由于该引擎未对处理的 SVG 节点嵌套深度进行限制，渲染此类文档时会导致线程栈溢出，从而终止应用程序。恶意 SVG 文档可通过 IMG 元素的 SRC 属性嵌入，因此只需诱骗受害者访问攻击者控制的网页即可实现 exploit。

CVSS 7.1 · High EPSS 0.32% · P23

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
gosub-io gosub-engine < 46868b3deae44544bee2a13e756772966dde950e affected
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I. Basic Information for CVE-2026-103087

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Uncontrolled recursion in the Gosub browser engine (gosub-engine) through 0.1.0 and main before commit 46868b3 allows a remote attacker to cause a Denial of Service (stack exhaustion and application crash) via an SVG document containing an excessive number of deeply nested elements. Because the engine does not limit the nesting depth of processed SVG nodes, rendering such a document overflows the thread stack and terminates the application. The malicious SVG can be embedded through the SRC attribute of an IMG element, and thus exploitation only requires the victim to visit an attacker-controlled web page.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的递归
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
gosub-io gosub-engine 0 ~ 46868b3deae44544bee2a13e756772966dde950e -

II. Public POCs for CVE-2026-103087

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-103087

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Patches & Fixes for CVE-2026-103087 (1)

Vendor Advisories for CVE-2026-103087 (1)

IV. Related Vulnerabilities

Same weakness: CWE-674

V. Comments for CVE-2026-103087

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