CVE-2026-5087

Summary

PAGI::Middleware::Session::Store::Cookie versions through 0.001003 for Perl generates random bytes insecurely.

PAGI::Middleware::Session::Store::Cookie attempts to read bytes from the /dev/urandom device directly. If that fails (for example, on systems without the device, such as Windows), then it will emit a warning that recommends the user install Crypt::URandom, and then return a string of random bytes generated by the built-in rand function, which is unsuitable for cryptographic applications.

This modules does not use the Crypt::URandom module, and installing it will not fix the problem.

The random bytes are used for generating an initialisation vector (IV) to encrypt the cookie.

A predictable IV may make it easier for malicious users to decrypt and tamper with the session data that is stored in the cookie.

Affected Software

Weaknesses

• CWE-338: CWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator
• CWE-1204: CWE-1204 Generation of Weak Initialization Vector (IV)

ADP Enrichment

CVE Program Container

Additional References

• http://www.openwall.com/lists/oss-security/2026/03/31/10

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: yes
  • Technical Impact: partial

References

• https://metacpan.org/release/JJNAPIORK/PAGI-Middleware-Session-Store-Cookie-0.001003/source/lib/PAGI/Middleware/Session/Store/Cookie.pm#L156-173
• https://metacpan.org/release/JJNAPIORK/PAGI-Middleware-Session-Store-Cookie-0.001004/changes

• ←Previous
• Next→