Is CVE-2026-40525 actively exploited?

No active exploitation of CVE-2026-40525 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-40525 be exploited remotely?

Yes. CVE-2026-40525 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-40525?

CVE-2026-40525 has a CVSS score of 9.1 (CRITICAL).

HOME VULNERABILITIESCVE-2026-40525

CRITICAL

CVE-2026-40525

CWE-636Published: April 17, 2026· Updated: Apr 21, 2026

9.1

CVSS v3.1

EPSS:0.11%probability of exploitation in 30 daysPercentile:29.2th

Official Description

OpenViking prior to version 0.3.9 contains an authentication bypass vulnerability in the VikingBot OpenAPI HTTP route surface where the authentication check fails open when the api_key configuration value is unset or empty. Remote attackers with network access to the exposed service can invoke privileged bot-control functionality without providing a valid X-API-Key header, including submitting attacker-controlled prompts, creating or using bot sessions, and accessing downstream tools, integrations, secrets, or data accessible to the bot.

NVD Source

Technical Analysis

CVE-2026-40525 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.