Nexus Repository 3: Server-Side Request Forgery
CVE-2026-14646 is a high-severity server-side request forgery vulnerability in Nexus Repository 3 from Sonatype, with a CVSS 3.1 base score of 7.7 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. The record lists version 3.94.0 as the first without the flaw, so updating Nexus Repository 3 to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.35% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Nexus Repository 3 to 3.94.0 or a later version.
- Update Nexus Repository Manager to 3.94.0 or a later version.
- Read the advisory on support.sonatype.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Sonatype | Nexus Repository 3 | 3.0.0 up to, but not including, 3.94.0 | 3.94.0 |
| Sonatype | Nexus Repository Manager | 3.0.0 up to, but not including, 3.94.0 | 3.94.0 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- ChangedThe attack can reach beyond the vulnerable component into other systems.
- Confidentiality
- NoneNo data is disclosed.
- Integrity
- HighData or code can be modified at will.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 4.9 | Medium | CNA |
| CVSS 3.1 | 7.7 | High | NVD |
Official description
Nexus Repository 3 did not apply its existing Server-Side Request Forgery (SSRF) protections to HTTP redirect targets returned by proxy repository upstream servers. Any user with read access to a proxy repository backed by an attacker-controlled or compromised upstream server — including an anonymous user, if anonymous access is enabled — could receive a response from an internal network address or cloud metadata endpoint as repository content, potentially exposing sensitive information such as cloud IAM credentials.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Server-Side Request Forgery
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.
How developers prevent this class of flaw
- If there is a known list of applications, IP, hostname, and/or domains to which the product is allowed to communicate, then use allowlists to ensure that outgoing requests are restricted to these known entities. The allowlists could be in the application code or possibly enforced by firewalls or network segmentation.
- If the product is expected to be able to connect to arbitrary IP addresses or domains, consider using a denylist that includes private network addresses, internal domain names, etc. The denylist could be in the application code or possibly enforced by firewalls or network segmentation.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
- help.sonatype.com/en/sonatype-nexus-repository-3-94-0-release-notes.htmlPermissions Required
Other vulnerabilities in Nexus Repository 3
- 8.6 High severity
- 8.1 High severity
- 7.1 High severity
- 7.1 High severity
- 7.7 High severity
- 8.7 High severity
Recent Server-Side Request Forgery vulnerabilities
- 8.2 High severity
- 7.7 High severity
- 7.7 High severity
- 7.3 High severity
- 9.6 Critical severity
- 10.0 Critical severity
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