CVE-2026-11832

Deferred Deferred - Pending Action

Predictable Nonce in Dancer2::Plugin::Auth::OAuth

Publication date: 2026-06-15

Last updated on: 2026-06-16

Assigner: CPANSec

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.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-06-15

Last Modified

2026-06-16

Generated

2026-07-06

AI Q&A

2026-06-16

EPSS Evaluated

2026-07-04

NVD

CVE-2026-11832

EUVD

EUVD-2026-37010

Affected Vendors & Products

Vendor	Product	Version / Range
plack	perl_dancer2_plugin_auth_oauth	to 0.22 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-338	The product uses a Pseudo-Random Number Generator (PRNG) in a security context, but the PRNG's algorithm is not cryptographically strong.

Attack-Flow Graph

Executive Summary

The vulnerability exists in Dancer2::Plugin::Auth::OAuth versions before 0.22 for Perl, where the default nonce is generated in a predictable manner.

Specifically, the nonce is created using an MD5 hash of the epoch time, which can be predicted by an attacker.

Mitigation Strategies

To mitigate this vulnerability, upgrade Dancer2::Plugin::Auth::OAuth to version 0.22 or later, where the nonce generation is no longer predictable.

Impact Analysis

Because the nonce is predictable, an attacker could potentially replay or forge authentication requests, compromising the security of the OAuth authentication process.

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