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CVE-2026-8503— Apache::Session::Generate::SHA256 versions before 1.3.19 for Perl create insecure session ids

AI Predicted 7.5 Difficulty: Hard EPSS 0.03% · P9

Possible ATT&CK Techniques 1AI

T1528 · Steal Application Access Token

Affected Version Matrix 1

VendorProductVersion RangeStatus
GUIMARDApache::Session::Generate::SHA256< 1.3.19affected
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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)

Affected Products

VendorProductAffected VersionsCPESubscribe
GUIMARDApache::Session::Generate::SHA256 0 ~ 1.3.19 -

II. Public POCs for CVE-2026-8503

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III. Intelligence Information for CVE-2026-8503

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IV. Related Vulnerabilities

Same weakness: CWE-340

V. Comments for CVE-2026-8503

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