CVE-2026-77123 Nexus Repository 3 - Webhook Secret Disclosure via Capability Read API
Attackers with read privileges can expose plaintext webhook secrets via the capability API, compromising integration security.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-77123?
CVE-2026-77123 is a medium-severity vulnerability in Sonatype Nexus Repository Manager, published on 2 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-201
Which versions are affected by CVE-2026-77123?
It affects 1 product.
Products include Sonatype Nexus Repository Manager.
How do I fix CVE-2026-77123?
Upgrade to a fixed version.
Is CVE-2026-77123 being exploited?
There is no known exploitation of CVE-2026-77123 in the wild and no public exploit code.
Other vulnerabilities in Sonatype Nexus Repository Manager
- CVE-2019-7238 Sonatype Nexus Repository Manager Incorrect Access Control
- CVE-2019-9629 Hardcoded credentials in n/a
- CVE-2017-17717 Hardcoded credentials in n/a
- CVE-2026-3199 Nexus Repository 3 - Authenticated Remote Code Execution via Task Property Injection
- CVE-2026-5189 Nexus Repository 3 - Hardcoded Credential in Internal Database Component
Sources
Also known as GHSA-m6f2-q3rh-xfc5, MINI-fp3x-h5qw-wff7, MINI-rr72-h8wh-hxq5.