Security readout for executives and security teams
Plain-English summary
CVE-2026-0600 lets a Nexus Repository 3 administrator configure proxy repositories to make the server reach unintended destinations. The main business risk is exposure of internal services or cloud metadata through the repository server. It requires administrator access, reducing likelihood, but affected systems may remain vulnerable by default even on 3.88.0 unless the workaround is configured.
Executive priority
Treat as a moderate-priority exposure review, especially for cloud-hosted or internally well-connected Nexus servers. It is not reported as actively exploited, but it can turn trusted admin access into internal network reach. Prioritize administrator control, outbound restrictions, and Sonatype’s workaround guidance.
Technical view
This is a CWE-918 SSRF in Sonatype Nexus Repository 3 proxy repository configuration. A high-privileged authenticated administrator can set URLs that cause Nexus to access unintended network destinations, potentially including cloud metadata and internal resources. Reported affected range is Nexus Repository 3.0.0 and later. CVSS v4.0 score is 6.2, medium.
Likely exposure
Organizations running Nexus Repository 3 with proxy repositories are most relevant. Exposure is higher where Nexus has network reachability to sensitive internal services or cloud metadata endpoints. Exploitation requires authenticated administrator privileges, so review admin account controls and configuration change paths.
Exploitation context
The source bundle does not indicate CISA KEV listing or active exploitation. The issue is not described as unauthenticated or remotely exploitable by any user; it depends on administrator-level configuration capability. Impact depends heavily on what the Nexus server can reach from its network location.
Researcher notes
Evidence is limited to the CVE record and Sonatype advisory reference in the source bundle. The product remains vulnerable by default, with a workaround configuration available starting in 3.88.0. No patch-level fixed version, exploit publication, or active exploitation evidence is provided in the supplied sources.
Mitigation direction
- Review Sonatype advisory for the supported workaround and current guidance.
- If on 3.88.0 or later, evaluate and enable the available workaround configuration.
- Restrict Nexus outbound network access to only required repository destinations.
- Limit and audit administrator access to Nexus Repository.
- Monitor proxy repository configuration changes for unusual or internal destinations.
Validation and detection
- Inventory Nexus Repository 3 instances and versions.
- Identify configured proxy repositories and their remote URLs.
- Confirm whether the 3.88.0 workaround is available and configured.
- Review network paths from Nexus to internal services and metadata endpoints.
- Check administrative audit logs for recent proxy repository changes.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-918: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCloud metadata behavior lookup
The CVE wording references SSRF or metadata access, so cloud discovery and credential material review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-0600 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.2 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
6.2MediumVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N
Source materials
- CVE List V5 sourceCVE List V5
- https://support.sonatype.com/hc/en-us/articles/47928855816595CVE reference · vendor-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Server-Side Request Forgery (SSRF)
Server-Side Request Forgery (SSRF) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.