CVE-2026-77123: Nexus Repository 3 - Webhook Secret Disclosure via Capability Read API

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-02 · updated 2026-09-22
Weakness: CWE-201

Description

Nexus Repository 3 contains a sensitive information disclosure vulnerability in the capability read API. An account holding the nexus:capabilities:read privilege can retrieve the plaintext shared secret configured on a webhook capability, which is intended to be masked from all API responses. This issue affects Nexus Repository 3 versions 3.2.0 through 3.95.x, and is fixed in version 3.96.0.

Affected products

Sonatype Nexus Repository 3: from 3.2.0 before 3.96.0 — fixed in 3.96.0

How to fix

Upgrade to a fixed version: Sonatype Nexus Repository 3 3.96.0. Check the vendor advisory for mitigations.

References

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