CVE-2026-5538CWE-918

QingdaoU OnlineJudge judge_server_heartbeat Endpoint JudgeServer.service_url server-side request forgery

Medium · published April 5, 2026

CVSS v4.0
5.3
EPSS
0%
Percentile
27.1
In the wild
Unconfirmed
What it is

A vulnerability was detected in QingdaoU OnlineJudge up to 1.6.1. Affected by this issue is the function service_url of the file JudgeServer.service_url of the component judge_server_heartbeat Endpoint. The manipulation results in server-side request forgery. It is possible to launch the attack remotely. The vendor was contacted early about this disclosure but did not respond in any way.

The record
Technical detail
CVSS v4.0
5.3 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X
EPSS
0.00347 · 27.1th percentile
Weakness
CWE-918 · Server-Side Request Forgery (SSRF)
Published
2026-04-05T03:15Z
EPSS history
Timeline
  • 05 APR 03:15Z
    QingdaoU OnlineJudge judge_server_heartbeat Endpoint JudgeServer.service_url server-side request forgery
    cvelistv5