CVE-2026-77123: CWE-201 Insertion of Sensitive Information Into Sent Data in Sonatype Nexus Repository 3
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.
CVSS v4.0
Score 6.0medium
Affected software
Sonatype
Nexus Repository 3
cpe:2.3:a:sonatype:nexus_repository_manager:3.2.0:*:*:*:*:*:*:*cpe:2.3:a:sonatype:nexus_repository_manager:3.2.1:*:*:*:*:*:*:*cpe:2.3:a:sonatype:nexus_repository_manager:3.3.0:*:*:*:*:*:*:*cpe:2.3:a:sonatype:nexus_repository_manager:3.3.1:*:*:*:*:*:*:*cpe:2.3:a:sonatype:nexus_repository_manager:3.3.2:*:*:*:*:*:*:*cpe:2.3:a:sonatype:nexus_repository_manager:3.4.0:*:*:*:*:*:*:*Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-77123 is a sensitive information disclosure vulnerability in Sonatype Nexus Repository 3. Specifically, the capability read API improperly exposes the plaintext shared secret configured on webhook capabilities to any account possessing the nexus:capabilities:read privilege. This secret should be masked in all API responses but is not, leading to potential unauthorized disclosure of sensitive webhook credentials. The vulnerability affects Nexus Repository 3 versions from 3.2.0 up to and including 3.95.x. The issue is resolved in version 3.96.0.
Potential Impact
An attacker with the nexus:capabilities:read privilege can obtain plaintext shared secrets for webhook capabilities, which are intended to remain confidential. Disclosure of these secrets could allow unauthorized triggering or manipulation of webhook integrations, potentially impacting the security of connected systems or workflows. The vulnerability does not allow privilege escalation or direct code execution but exposes sensitive configuration data.
Mitigation Recommendations
Upgrade Nexus Repository 3 to version 3.96.0 or later, where this vulnerability is fixed. Until the upgrade is applied, restrict the nexus:capabilities:read privilege to trusted accounts only to limit exposure. Patch status is confirmed fixed in 3.96.0.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Sonatype
- Date Reserved
- 2026-08-20T13:00:26.092Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a985b8aacd9273b49838333
Added to database: 09/02/2026, 17:23:22 UTC
Last enriched: 09/07/2026, 13:35:30 UTC
Last updated: 10/17/2026, 18:48:22 UTC
Views: 112
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