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CVE-2026-58487— HedgeDoc: Stored HTML injection via email local-part

Quick assessment

Affected
hedgedoc hedgedoc
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.

HedgeDoc是HedgeDoc团队开源的一个基于Javascript的Markdown文档实时编辑分享平台。 HedgeDoc 1.11.0之前版本存在安全漏洞，该漏洞源于对注册电子邮件地址的本地部分处理不安全，容易受到存储型HTML注入攻击，攻击者可以注册特制电子邮件地址，注入任意HTML到其他用户查看的页面中。

AI Predicted 5.4 Difficulty: Easy EPSS 0.49% · P40

Affected Version Matrix 1

VendorProduct Version RangeStatus
hedgedoc hedgedoc < 1.11.0 affected
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I. Basic Information for CVE-2026-58487

Vulnerability Information
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Vulnerability Title
HedgeDoc: Stored HTML injection via email local-part
Source: CVE Program / CVE List V5
Vulnerability Description
HedgeDoc is an open source, real-time, collaborative, markdown notes application. Prior to version 1.11.0, due to unsafe handling of the local-part of registered email addresses, HedgeDoc was vulnerable to stored HTML Injection through its publish and slide views. An attacker could register a specially crafted email address and inject arbitrary HTML into pages viewed by other users. HedgeDoc accepted RFC 5321 quoted-string local-parts in email addresses during registration. The local-part was then reused as the user's display name without escaping and rendered into HTML in multiple places, including publish and slide views as well as the collaborative editor. An attacker could break out of an HTML attribute and inject arbitrary markup into the page. While the deployed Content-Security-Policy prevented straightforward inline JavaScript execution, the injected HTML was still sufficient to alter page content and embed attacker-controlled resources such as cross-origin iframes. This issue was fixed in version 1.11.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
HedgeDoc 输出处理不当漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
HedgeDoc是HedgeDoc团队开源的一个基于Javascript的Markdown文档实时编辑分享平台。 HedgeDoc 1.11.0之前版本存在安全漏洞，该漏洞源于对注册电子邮件地址的本地部分处理不安全，容易受到存储型HTML注入攻击，攻击者可以注册特制电子邮件地址，注入任意HTML到其他用户查看的页面中。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
hedgedoc hedgedoc < 1.11.0 -

II. Public POCs for CVE-2026-58487

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III. Intelligence Information for CVE-2026-58487

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Vendor Advisories for CVE-2026-58487 (1)

Same Patch Batch · hedgedoc · 2026-07-13 · 4 CVEs total

CVE-2026-58488 HedgeDoc: Rate-limit bypass via CF-Connecting-IP header spoofing
CVE-2026-58489 HedgeDoc: CSRF in GitHub Gist export callback
CVE-2026-58486 HedgeDoc: Denial-of-service via YAML alias expansion in note frontmatter

IV. Related Vulnerabilities

Same product: hedgedoc
Same vendor: hedgedoc
Same weakness: CWE-79

V. Comments for CVE-2026-58487

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