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CVE-2026-58488— HedgeDoc: Rate-limit bypass via CF-Connecting-IP header spoofing

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，该漏洞源于通过伪造IP地址绕过/login和/register路由的速率限制，可能导致攻击者发送垃圾登录请求或创建多个任意账户。

AI Predicted 5.3 Difficulty: Easy EPSS 0.41% · P32

Affected Version Matrix 1

VendorProduct Version RangeStatus
hedgedoc hedgedoc < 1.11.0 affected
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I. Basic Information for CVE-2026-58488

Vulnerability Information
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Vulnerability Title
HedgeDoc: Rate-limit bypass via CF-Connecting-IP header spoofing
Source: CVE Program / CVE List V5
Vulnerability Description
HedgeDoc is an open source, real-time, collaborative, markdown notes application. Versions prior to 1.11.0 allowed attackers to circumvent the rate-limiting of the /login and /register routes by spoofing IP addresses. HedgeDoc instances checked for CloudFlare's cf-connecting-ip header and used that instead of the users real IP address, if the header was present even when the request did not originate from Cloudflare. This made it possible for an attacker to spam login requests or create multiple arbitrary accounts by sending another cf-connecting-ip header every few requests. The issue has been fixed in version 1.11.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用欺骗进行的认证绕过
Source: CVE Program / CVE List V5
Vulnerability Title
HedgeDoc 授权问题漏洞
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，该漏洞源于通过伪造IP地址绕过/login和/register路由的速率限制，可能导致攻击者发送垃圾登录请求或创建多个任意账户。
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-2026-58488

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III. Intelligence Information for CVE-2026-58488

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Vendor Advisories for CVE-2026-58488 (1)

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

CVE-2026-58487 HedgeDoc: Stored HTML injection via email local-part
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-290

V. Comments for CVE-2026-58488

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