CVE-2026-11832: Dancer2::Plugin::Auth::OAuth versions before 0.22 for Perl default to a predictable nonce

Severity: critical (CVSS 9.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-15 · updated 2026-10-25
Weakness: CWE-338

Description

Dancer2::Plugin::Auth::OAuth versions before 0.22 for Perl default to a predictable nonce. The default nonce was generated using an MD5 hash of the epoch time, which is predictable.

Affected products

BIAFRA Dancer2::Plugin::Auth::OAuth: before 0.22 — fixed in 0.22

How to fix

Upgrade to a fixed version: BIAFRA Dancer2::Plugin::Auth::OAuth 0.22. Check the vendor advisory for mitigations.

References

https://datatracker.ietf.org/doc/html/rfc5849#section-3.3
https://datatracker.ietf.org/doc/html/rfc5849#section-4.9
https://metacpan.org/release/BIAFRA/Dancer2-Plugin-Auth-OAuth-0.22/changes
https://www.cve.org/CVERecord?id=CVE-2025-22376

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