CVE-2026-8503— Apache::Session::Generate::SHA256 versions before 1.3.19 for Perl create insecure session ids
Possible ATT&CK Techniques 1AI
T1528 · Steal Application Access TokenAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| GUIMARD | Apache::Session::Generate::SHA256 | < 1.3.19 | affected |
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I. Basic Information for CVE-2026-8503
Vulnerability Information
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Vulnerability Title
Apache::Session::Generate::SHA256 versions before 1.3.19 for Perl create insecure session ids
Source: NVD (National Vulnerability Database)
Vulnerability Description
Apache::Session::Generate::SHA256 versions before 1.3.19 for Perl create insecure session ids. Apache::Session::Generate::SHA256 generated session ids insecurely. The default session id generator returns a SHA-256 hash of the built-in rand() function, the epoch time, and the PID, that is hashed again. These are predictable, low-entropy sources. Predicable session ids could allow an attacker to gain access to systems. Note that version 1.3.19 has a fallback without warning to use insecure session generation method if the call to Crypt::URandom::urandom fails. However, this is unlikely as Crypt::URandom is a hardcoded requirement of the module. This issue is similar to CVE-2025-40931 for Apache::Session::Generate::MD5.
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
Apache::Session::Generate::SHA256 安全特征问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache::Session::Generate::SHA256是Apache基金会的一个会话管理模块。 Apache::Session::Generate::SHA256 1.3.19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，使用内置rand()函数、纪元时间和PID的SHA-256哈希，这些是可预测的低熵源，可能导致攻击者预测会话ID并获取系统访问权限。
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 |
|---|---|---|---|---|
| GUIMARD | Apache::Session::Generate::SHA256 | 0 ~ 1.3.19 | - |
II. Public POCs for CVE-2026-8503
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
Same weakness: CWE-340
- CVE-2026-5084
WebDyne::Session versions through 2.075 for Perl generates t - 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
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