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CVE-2026-8739— Sanluan PublicCMS SafeConfigComponent.java getSignKey hard-coded key

Quick assessment

Affected
Sanluan PublicCMS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

PublicCMS是中国PublicCMS公司的一套使用Java语言编写的开源内容管理系统（CMS）。 PublicCMS 5.202506.d版本存在加密问题漏洞，该漏洞源于publiccms-core/src/main/java/com/publiccms/logic/component/config/SafeConfigComponent.java文件的getSignKey函数对参数privatefile_key的操作，可能导致使用硬编码加密密钥，攻击可远程执行。

CVSS 5.3 · Medium EPSS 0.28% · P20

Possible ATT&CK Techniques 1 AI

T1552.004 · Private Keys

Affected Version Matrix 1

VendorProduct Version RangeStatus
Sanluan PublicCMS 5.202506.d affected
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I. Basic Information for CVE-2026-8739

Vulnerability Information
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Vulnerability Title
Sanluan PublicCMS SafeConfigComponent.java getSignKey hard-coded key
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was detected in Sanluan PublicCMS 5.202506.d. The affected element is the function getSignKey of the file publiccms-core/src/main/java/com/publiccms/logic/component/config/SafeConfigComponent.java. The manipulation of the argument privatefile_key results in use of hard-coded cryptographic key . The attack can be executed remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用硬编码的密码学密钥
Source: CVE Program / CVE List V5
Vulnerability Title
PublicCMS 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PublicCMS是中国PublicCMS公司的一套使用Java语言编写的开源内容管理系统（CMS）。 PublicCMS 5.202506.d版本存在加密问题漏洞，该漏洞源于publiccms-core/src/main/java/com/publiccms/logic/component/config/SafeConfigComponent.java文件的getSignKey函数对参数privatefile_key的操作，可能导致使用硬编码加密密钥，攻击可远程执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Sanluan PublicCMS 5.202506.d cpe:2.3:a:publiccms:publiccms:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-8739

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III. Intelligence Information for CVE-2026-8739

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Other References for CVE-2026-8739 (1)

Same Patch Batch · Sanluan · 2026-05-17 · 4 CVEs total

CVE-2026-8738 6.5 MEDIUM Sanluan PublicCMS Trade Payment Flow TradeOrderController.java AccountGatewayComponent.pay
CVE-2026-8740 6.3 MEDIUM Sanluan PublicCMS templateResult API TemplateResultDirective.java execute special elements
CVE-2026-8737 5.3 MEDIUM Sanluan PublicCMS Trade Address Query TradeAddressListDirective.java execute missing authe

IV. Related Vulnerabilities

Same product: PublicCMS
Same vendor: Sanluan
Same weakness: CWE-321

V. Comments for CVE-2026-8739

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