CVE-2026-5084— WebDyne::Session versions through 2.075 for Perl generates the session id insecurely
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I. Basic Information for CVE-2026-5084
Vulnerability Information
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Vulnerability Title
WebDyne::Session versions through 2.075 for Perl generates the session id insecurely
Source: NVD (National Vulnerability Database)
Vulnerability Description
WebDyne::Session versions through 2.075 for Perl generates the session id insecurely. The session handler generates the session id from an MD5 hash seeded with a call to the built-in rand() function. The rand function is passed a maximum value based on the process id, the epoch time and the reference address of the object, but this information will have no effect on the overall quality of the seed of the message digest. The rand function is seeded by 32-bits and is predictable. It is considered unsuitable for cryptographic purposes. Predictable session ids could allow an attacker to gain access to systems. Note that WebDyne::Session versions 1.042 and earlier appear to be in separate distributions from WebDyne.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
可预测问题
Source: NVD (National Vulnerability Database)
Vulnerability Title
WebDyne::Session 安全特征问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WebDyne::Session是ASPEER个人开发者的一个用于 Web 应用会话管理的服务器端组件。 WebDyne::Session 2.075及之前版本存在安全特征问题漏洞，该漏洞源于会话ID生成不安全，会话处理程序使用MD5哈希种子调用内置rand函数，rand函数基于进程ID、纪元时间和对象引用地址生成种子，但种子质量不足，rand函数可预测，可能导致攻击者获取系统访问权限。
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 |
|---|---|---|---|---|
| ASPEER | WebDyne::Session | 0 ~ 2.075 | - |
II. Public POCs for CVE-2026-5084
| # | POC Description | Source Link | Shenlong Link |
|---|
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- CPAN Author’s Guide to Random Data for Security | security.metacpan.orgtechnical-description
- https://nvd.nist.gov/vuln/detail/CVE-2026-5084
IV. Related Vulnerabilities
Same weakness: CWE-340
- CVE-2026-5081
Apache::Session::Generate::ModUniqueId versions from 1.54 th - CVE-2026-5080
Dancer::Session::Abstract versions through 1.3522 for Perl g - CVE-2026-5085
Solstice::Session versions through 1440 for Perl generates s - CVE-2026-5083
Ado::Sessions versions through 0.935 for Perl generates inse - CVE-2026-5082
Amon2::Plugin::Web::CSRFDefender versions from 7.00 through
V. Comments for CVE-2026-5084
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