CVE-2026-77123: Nexus Repository 3 contains a sensitive information disclosure vulnerability in the capability read API

Routine

MEDIUM 6.5UPGRADE

CVE-2026-77123 is a medium-severity flaw (CVSS 6.5) affecting nexus repository manager. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 61%)
CISA exploited list	No
Weakness	CWE-201
Published	2026-09-02
Last modified	2026-09-22

Publisher (CNA): Sonatype · Vendor: sonatype

Last updated 2026-09-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-02 18:21 UTCPublished CVE record published
2026-09-22 17:24 UTCUpdated Record last modified

sonatype nexus repository manager UPGRADE

Affected: >= 3.2.0 and < 3.96.0

Fixed in: 3.96.0

Safe to downgrade to: a release before 3.2.0

1. Check installed version

apt-cache policy nexus-repository-manager || rpm -q nexus-repository-manager || nexus-repository-manager --version

2. UPGRADE to 3.96.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade nexus-repository-manager

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade nexus-repository-manager

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 3.2.0 (Debian / Ubuntu)

apt-cache madison nexus-repository-manager sudo apt install nexus-repository-manager=<VERSION_BEFORE_3.2.0> sudo apt-mark hold nexus-repository-manager

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list nexus-repository-manager sudo dnf downgrade nexus-repository-manager-<VERSION_BEFORE_3.2.0> sudo dnf versionlock add nexus-repository-manager

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-77123?

nexus repository manager: upgrade to 3.96.0. Exact commands for each OS are on this page.

Is CVE-2026-77123 being exploited?

CVE-2026-77123 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-77123 affect?

CVE-2026-77123 affects nexus repository manager. Severity is medium (CVSS 6.5). 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, w

How urgent is CVE-2026-77123?

Priority 33/100. No elevated risk signals yet.

Software pages

Sonatype Nexus vulnerabilities

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References

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