Is there a public exploit for CVE-2026-128065?

No public exploit for CVE-2026-128065 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-128065?

CVE-2026-128065 scores CVSS 6.9 (v4.0), rated medium. EPSS puts the chance of exploitation in the next 30 days at 0.00448%.

What does CVE-2026-128065 affect?

CVE-2026-128065 affects @grpc/grpc-js-xds.

6.9 Medium

@grpc/grpc-js: RBAC override configs in VirtualHost and Route resources are not applied

CVE-2026-128065

Summary XdsServer in @grpc/grpc-js-xds does not apply RBACPerRoute overrides from matching Route or VirtualHost resources. When a trusted xDS control plane supplies a broad top-level ALLOW policy and a stricter override, XdsServer ACKs the resources but evaluates the RPC under the top-level policy. Details Override parser lookup uses the override message type parseOverrideFilterConfig() in packages/grpc-js-xds/src/http-filter.ts:225-257 looks up FILTERREGISTRY using the override message type: type.googleapis.com/envoy.extensions.filters.http.rbac.v3.RBACPerRoute Source: https://github.com/grpc/grpc-node/blob/56567d9604b4e45cdca0d2e3c2a60ac227ee659d/packages/grpc-js-xds/src/http-filter.ts#L225-L257 setup() in packages/grpc-js-xds/src/http-filter/rbac-filter.ts:167-173 registers the filter only under the top-level RBAC type: type.googleapis.com/envoy.extensions.filters.http.rbac.v3.RBAC Source: https://github.com/grpc/grpc-node/blob/56567d9604b4e45cdca0d2e3c2a60ac227ee659d/packages/grpc-js-xds/src/http-filter/rbac-filter.ts#L167-L173 The lookup returns null even though the registered entry contains parseOverrideRbacConfig(), and server.ts silently skips the override. Override maps…

Assessment

CVSS: 6.9 (v4.0)
Severity: Medium
EPSS: 0.00448% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 12 November 2026
Last updated: 12 November 2026
Affected: @grpc/grpc-js-xds
Weakness: CWE-863

CVSS vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

At the source

GitHub Advisories

References

Community proofs of concept

No community proof of concept yet. If you have one for a published vulnerability and the right to share it, add it below — it will appear here once reviewed.

Submit a proof of concept

Only for publicly disclosed vulnerabilities, and only material from testing you were authorised to perform. This platform does not buy, sell, or broker exploits — see earning from vulnerability research for legitimate bounty programs. Submissions are reviewed before they appear. Text only; do not include live credentials, personal data, or anything targeting systems you are not permitted to test.

Title *

Proof of concept *

Write-up (optional)

Affected versions (optional)

Name or handle (optional)

References (optional, one URL per line)

Licence for your contribution *

Private contact (optional, never shown)

Before you submit * This vulnerability is already publicly disclosed (it has a published CVE). This material comes only from testing I was authorised to perform. I have the legal right to publish this content and am not breaching any agreement by doing so. It contains no live credentials, personal data, or anything targeting systems I am not authorised to test. I understand it will be reviewed before it appears publicly and may be rejected. I agree to the submission terms.

What is 5 + 3? *

Query this programmatically

Agents can read this through the MCP endpoint, or over HTTP:

curl https://cve.zerocrew.in/api/cve/CVE-2026-128065