Quick answers
- Is CVE-2026-77125 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-77125 being exploited in the wild.
- How severe is CVE-2026-77125?
- High severity, with a CVSS score of 7.1, published 2 September 2026.
- Which products and versions are affected?
- Sonatype Nexus Repository 3 3.x (prior to patched versions in 3.96.0+).
- Is there a fix for CVE-2026-77125?
- 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-2026-77125 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-77125?
- Check whether you run Sonatype Nexus Repository 3 or Sonatype Nexus Repository Manager at an affected version. 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
This is an authorization bypass vulnerability affecting the blobstore group management REST API endpoints in Nexus Repository 3. The root cause is insufficient permission enforcement: two endpoints do not correctly validate that the user holds the nexus:blobstores:update permission before allowing conversion of an existing blobstore into a group blobstore. An attacker who has been granted the lower-privilege nexus:blobstores:create permission (which must be explicitly assigned) can invoke these endpoints to perform operations that should require the nexus:blobstores:update permission instead. The attack is network-accessible and requires only valid authentication credentials with the create permission. The fix is available in patched versions of Nexus Repository 3.
Affected products
- Sonatype Nexus Repository 3 3.x (prior to patched versions in 3.96.0+)
Timeline
- 2026-09-02: disclosed