CVE-2026-25255: gRPC server exposed dangerous function privilege escalation

CVE-2026-25255 · Severity: high · CVSS 8.8 · Published 2026-09-22

A gRPC server implementation exposes a dangerous function that can be called by unauthenticated attackers to gain elevated privileges on the affected system. This vulnerability allows an attacker with network access to bypass authorization controls and execute operations with higher privileges than intended, potentially leading to full system compromise.

Technologies: <UNKNOWN>.

Quick answers

Is CVE-2026-25255 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-25255 being exploited in the wild.
How severe is CVE-2026-25255?
High severity, with a CVSS score of 8.8, published 22 September 2026.
Which products and versions are affected?
<UNKNOWN>.
Is there a fix for CVE-2026-25255?
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-2026-25255 attacked?
It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-25255?
Check whether you run <UNKNOWN>. 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

A gRPC service exposes a privileged function without proper access controls, allowing unauthenticated or unprivileged network callers to invoke operations intended for administrative use only. The vulnerability stems from insufficient authorization validation on the exposed RPC method. Exploitation requires only network connectivity to the gRPC server endpoint.

Affected products

  • <UNKNOWN>

Timeline

  • 2026-09-22: disclosed

References

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