Medium 6.3Published Apr 4, 2026

CVE-2026-5538QingdaoU OnlineJudge judge_server_heartbeat Endpoint JudgeServer.service_url server-side request forgery

Updated under an hour ago (Oct 26, 2026, 7:30 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for QingdaoU OnlineJudge

Exploited in the last 30 days

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.

CVSS: 6.3 MEDIUM (v3.1, CNA)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
Weakness (CWE): CWE-918
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulDB
NVD analysis: Deferred
Record last updated: Apr 6, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

QingdaoU OnlineJudge qingdaou:onlinejudge (from the name)	1.6.0; 1.6.1	CNA record

References

References

https://vuldb.com/vuln/355291	vdb-entry, technical-description
https://vuldb.com/vuln/355291/cti	signature, permissions-required
https://vuldb.com/submit/782203	third-party-advisory
https://github.com/AnalogyC0de/public_exp/issues/27	issue-tracking

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.