CVE-2026-5999

MEDIUMNVD 6.36.3—
EchelonGraph scoreMEDIUM confidence

Score 6.3 from GitHub Security Advisory published 2026-04-10. NVD baseline CVSS 6.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
6.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.3Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A vulnerability has been found in JeecgBoot up to 3.9.1. This impacts an unknown function of the component SysAnnouncementController. Such manipulation leads to improper authorization. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The vendor confirmed the issue and will provide a fix in the upcoming release.

CVSS v3
6.3
EG Score
6.3(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity63% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
11%
KEV
Not listed

Published

April 10, 2026

Last Modified

April 29, 2026

Advisory Details (3)

Auto-updated Aug 2, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

The SysAnnouncementController has all CRUD endpoints without permission annotations, resulting in both functional and horizontal privilege escalation issues · Issue #9508 · jeecgboot/JeecgBoot · GitHub

https://github.com/jeecgboot/JeecgBoot/issues/9508#issuecomment-4199090102
generic🟡 PoC Available

The SysAnnouncementController has all CRUD endpoints without permission annotations, resulting in both functional and horizontal privilege escalation issues · Issue #9508 · jeecgboot/JeecgBoot · GitHub

https://github.com/jeecgboot/JeecgBoot/issues/9508
generic

GitHub - jeecgboot/JeecgBoot: 【低代码迈入v2.0时代，一句话即可生成整个系统】企业级AI低代码平台，一键生成前后端代码甚至整个系统。 AI Skills 一句话画流程、设计表单、生成报表、大屏。内置 AI应用平台涵盖：AI聊天、知识库、流程编排、MCP插件等，兼容主流大模型。引领AI低代码「Skills 生成 → 在线配置 → 代码生成 → 手工合并->AI修改」开发模式，解决 Java 项目 90% 重复工作...

GitHub - jeecgboot/JeecgBoot: 【低代码迈入v2.0时代，一句话即可生成整个系统】企业级AI低代码平台，一键生成前后端代码甚至整个系统。 AI Skills 一句话画流程、设计表单、生成报表、大屏。内置 AI应用平台涵盖：AI聊天、知识库、流程编排、MCP插件等，兼容主流大模型。引领AI低代码「Skills 生成 → 在线配置 → 代码生成 → 手工合并->AI修改」开发模式，解决 Java 项目 90% 重复工作，提高效率又不失灵活。 · GitHub

https://github.com/jeecgboot/JeecgBoot/

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 5× in last 7d / 23× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 167 total refreshes for this CVE.

  1. 2026-09-15 03:11 UTCEPSS rescore
  2. 2026-09-13 16:47 UTCEPSS rescore
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  25. 2026-08-16 07:05 UTCGHSA enrichment
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  1. 2026-08-15 01:30 UTCEPSS rescore
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  3. 2026-08-14 05:04 UTCGHSA enrichment
  4. 2026-08-13 22:00 UTCEPSS rescore
  5. 2026-08-12 19:17 UTCEG score recompute
  6. 2026-08-12 19:17 UTCGHSA enrichment
  7. 2026-08-12 13:51 UTCEPSS rescore
  8. 2026-08-11 06:30 UTCEG score recompute
  9. 2026-08-11 06:30 UTCGHSA enrichment
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  11. 2026-08-10 05:30 UTCEG score recompute
  12. 2026-08-10 05:30 UTCGHSA enrichment
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  15. 2026-08-09 04:30 UTCGHSA enrichment
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  18. 2026-08-07 14:21 UTCGHSA enrichment
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  21. 2026-08-05 23:42 UTCGHSA enrichment
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  25. 2026-08-03 21:57 UTCEG score recompute
  26. 2026-08-03 21:57 UTCGHSA enrichment
  27. 2026-08-03 10:36 UTCEPSS rescore
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  29. 2026-08-02 13:49 UTCGHSA enrichment
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  45. 2026-07-23 03:21 UTCEG score recompute
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  50. 2026-07-20 20:02 UTCOSV refresh
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  75. 2026-07-05 02:31 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-5999?
CVE-2026-5999 is a medium vulnerability published on April 10, 2026. A vulnerability has been found in JeecgBoot up to 3.9.1. This impacts an unknown function of the component SysAnnouncementController. Such manipulation leads to improper authorization. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The vendor…
When was CVE-2026-5999 disclosed?
CVE-2026-5999 was first published in the National Vulnerability Database on April 10, 2026, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-5999 actively exploited?
CVE-2026-5999 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 88.8% of all scored CVEs.
What is the CVSS score of CVE-2026-5999?
CVE-2026-5999 has a CVSS v3 base score of 6.3 (NVD).
How do I remediate CVE-2026-5999?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-5999, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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