CVE-2026-118986

High

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.

SeverityHigh

CVSS7.5

Exploit probability—

ProductCallbackery

PublishedOct 30, 2026

First seenNov 4, 2026

Weakness typeCWE-338CWE-338

How to fix

Update

CallBackery0.62.0 or later

Vendor advisories

metacpan.org/release/OETIKER/CallBackery-0.62.0/changes

Affected products

Product	Affected versions	Fixed in
CallBackery	v < 0.62.0	0.62.0

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.