CVE-2026-58488CWE-290CWE-770

HedgeDoc: Rate-limit bypass via CF-Connecting-IP header spoofing

Medium · published July 13, 2026

CVSS v4.0
6.9
EPSS
0%
Percentile
33.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
6.9 · MEDIUM
Vector
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
EPSS
0.00406 · 33.7th percentile
Weaknesses
CWE-290 · Authentication Bypass by Spoofing; CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2026-07-13T21:43Z
EPSS history
Timeline
  • 13 JUL 21:43Z
    HedgeDoc: Rate-limit bypass via CF-Connecting-IP header spoofing
    cvelistv5