CVE-2026-58488 Details
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.
A rate-limiting bypass vulnerability has been identified in HedgeDoc versions prior to 1.11.0. The issue arises because these versions incorrectly prioritize the CloudFlare 'cf-connecting-ip' header over the actual IP address of the user. This flaw allows attackers to circumvent rate limits on the '/login' and '/register' routes by spoofing IP addresses. Exploitation involves sending a fake 'cf-connecting-ip' header with each request to bypass restrictions and flood the application with login attempts or create multiple accounts.
Users can upgrade to HedgeDoc version 1.11.0 or later, where this issue is fixed. If an upgrade is not possible, administrators could remove the 'cf-connecting-ip' header in their reverse proxy.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jul 13, 2026CISA-ADP
Assessed Jul 14, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-2f9f-w8xq-276v | [email protected] | AdvisoryRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-290 | Authentication Bypass by Spoofing | [email protected] |
| CWE-770 | Allocation of Resources Without Limits or Throttling | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| HedgeDoc | <= 1.10.8 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 14, 2026 | CVE Modified | CISA-ADP |
| Jul 13, 2026 | New CVE Received | [email protected] |