Is CVE-2026-42560 actively exploited?

No active exploitation of CVE-2026-42560 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-42560 be exploited remotely?

Yes. CVE-2026-42560 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-42560?

CVE-2026-42560 has a CVSS score of 9.1 (CRITICAL).

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CRITICAL

CVE-2026-42560

CWE-287Published: May 9, 2026· Updated: May 13, 2026

9.1

CVSS v3.1

EPSS:0.07%probability of exploitation in 30 daysPercentile:21.3th

Official Description

auth provides authentication via oauth2, direct and email. From versions 1.18.0 to before 1.25.2 and 2.0.0 to before 2.1.2, the Patreon OAuth provider maps every authenticated Patreon account to the same local user.ID, instead of deriving a unique ID from the Patreon account returned by Patreon. In practice, this means all Patreon-authenticated users of an application using this library are collapsed into a single local identity. Any application that trusts token.User.ID as the stable account key can end up mixing or fully merging unrelated Patreon users, which can lead to cross-account access, privilege confusion, and subscription-state leakage. This issue has been patched in versions 1.25.2 and 2.1.2.

NVD Source

Technical Analysis

CVE-2026-42560 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 9.1.

From a weakness classification perspective (CWE-287): Authentication bypass vulnerabilities allow attackers to access protected resources without valid credentials.