Vulnerability · Published Oct 30, 2026 · Assigned by CPANSec
CVE-2026-118986CallBackery versions before 0.62.0 for Perl allow session cookie forgery via a signing secret generated with rand()
Unrated
In plain English
A security flaw in CallBackery. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 5% of all known vulnerabilities).
Official description
CallBackery versions before 0.62.0 for Perl allow session cookie forgery via a signing secret generated with rand(). The secret that signs session cookies is built from two calls to the built-in rand(), which is seeded with 32 bits. The secret therefore has at most 2**32 possible values, and one signed cookie is enough to test each candidate offline. An attacker who obtains a single session cookie can recover the secret and sign cookies for any user, including an administrator.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| CallBackery | 0 – before 0.62.0 |
Weakness: CWE-338