CVE-2026-5538

MEDIUM 6.3

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

CVSS Score

6.3

EPSS Score

0.0%

EPSS Percentile

10th

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.

CWE	CWE-918
Vendor	qingdaou
Product	onlinejudge
Published	Apr 5, 2026
Last Updated	Apr 6, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:R

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

QingdaoU / OnlineJudge

1.6.0 1.6.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/355291 vuldb.com: https://vuldb.com/vuln/355291/cti vuldb.com: https://vuldb.com/submit/782203 github.com: https://github.com/AnalogyC0de/public_exp/issues/27

Credits

🔍 Ana10gy (VulDB User) VulDB CNA Team