Quick answers
- Is CVE-2026-97666 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-97666 being exploited in the wild.
- How severe is CVE-2026-97666?
- Informational severity, published 15 October 2026.
- Which products and versions are affected?
- Sonatype Nexus Repository 3.
- Is there a fix for CVE-2026-97666?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-97666 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-97666?
- Check whether you run Sonatype Nexus Repository 3. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability is an information disclosure flaw in the ExtDirect endpoint that allows unauthenticated input to be supplied to Java class-loading calls. An attacker can probe for the presence of specific classes by sending crafted requests to the endpoint and observing whether the class exists, without requiring authentication. The flaw does not itself permit code execution but leaks architectural and dependency information.
Affected products
- Sonatype Nexus Repository 3
Timeline
- 2026-10-15: disclosed