CVE-2026-5087 PAGI::Middleware::Session::Store::Cookie versions through 0.001003 for Perl generates random bytes insecurely
Insecure random number generation for session cookie IVs allows attackers to decrypt and tamper with session data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-5087?
CVE-2026-5087 is a high-severity vulnerability in JJNAPIORK PAGI::Middleware::Session::Store::Cookie, published on 31 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2026-5087?
It affects 1 product.
Products include Jjnapiork Pagi\.
How do I fix CVE-2026-5087?
No fix has been published for CVE-2026-5087 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-5087 being exploited?
There is no known exploitation of CVE-2026-5087 in the wild and no public exploit code.
Sources
Also known as GHSA-r6mr-wmgj-f864.