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CRITICAL severity

NeuVector Enforcer is vulnerable to Command Injection and Buffer overflowGHSA-c8g6-qrwh-m3vp

CRITICAL

GHSA-c8g6-qrwh-m3vp is a critical-severity (CVSS 9.9) OS Command Injection vulnerability in github.com/neuvector/neuvector. A fix is available for github.com/neuvector/neuvector — see the affected versions and patch details below.

Also known asCVE-2025-54469GO-2025-4042
Published
Updated
Affected
3 pkgs
Patched
3 / 3
Exploits
None indexed
Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • A successful exploit gives an attacker total control of the affected component, not partial access.
  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for GHSA-c8g6-qrwh-m3vp.

EPSS Exploitation Probability

via FIRST.org ↗
0.5%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs41th percentile — riskier than 41% of all scored CVEsHighest risk
0.00%0.32%0.65%0.97%0.1%0.5%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

3 pkgs affected
🐹github.com/neuvector/neuvector🐹github.com/neuvector/neuvector🐹github.com/neuvector/neuvector

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.

Description

Impact

A vulnerability was identified in NeuVector, where the enforcer used environment variables CLUSTER_RPC_PORT and CLUSTER_LAN_PORT to generate a command to be executed via popen, without first sanitising their values.

The entry process of the enforcer container is the monitor process. When the enforcer container stops, the monitor process checks whether the consul subprocess has exited. To perform this check, the monitor process uses the popen function to execute a shell command that determines whether the ports used by the consul subprocess are still active.

The values of environment variables CLUSTER_RPC_PORT and CLUSTER_LAN_PORT are used directly to compose shell commands via popen without validation or sanitization. This behavior could allow a malicious user to inject malicious commands through these variables within the enforcer container.

In the patched version, the monitor process validates the values of CLUSTER_RPC_PORT and CLUSTER_LAN_PORT to ensure they contain only valid port numbers before invoking the popen command.

If validation fails, the monitor process exits immediately, causing the enforcer container to terminate. This prevents the execution of any injected or malicious commands.

Patches

Patched versions include release v5.4.7 and above.

Workarounds

There is no workaround for this issue. Users are recommended to upgrade, as soon as possible, to a version of NeuVector that contains the fix.

References

If you have any questions or comments about this advisory:

Affected Packages

3 total 3 fixed
EcosystemPackageVulnerable rangeFix
🐹Gogithub.com/neuvector/neuvector≥ 5.3.0&&< 5.3.55.3.5go get github.com/neuvector/neuvector@v5.3.5
🐹Gogithub.com/neuvector/neuvector≥ 5.4.0&&< 5.4.75.4.7go get github.com/neuvector/neuvector@v5.4.7
🐹Gogithub.com/neuvector/neuvector≥ 0.0.0-20230727023453-1c4957d53911&&< 0.0.0-20251020133207-084a437033b40.0.0-20251020133207-084a437033b4go get github.com/neuvector/neuvector@v0.0.0-20251020133207-084a437033b4

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/neuvector/neuvector, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update github.com/neuvector/neuvector to 5.3.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-c8g6-qrwh-m3vp is resolved across your whole dependency graph.

  3. Workarounds

    Stop passing untrusted input into the interpreter or shell: call the affected binary with an argument array rather than a composed command string, reject anything outside a strict allowlist of expected values, and run the component under an account that cannot reach beyond the work it legitimately does.

Frequently Asked Questions

### Impact A vulnerability was identified in NeuVector, where the enforcer used environment variables `CLUSTER_RPC_PORT` and `CLUSTER_LAN_PORT` to generate a command to be executed via `popen`, without first sanitising their values. The entry process of the enforcer container is the monitor process. When the enforcer container stops, the monitor process checks whether the consul subprocess has exited. To perform this check, the monitor process uses the `popen` function to execute a shell command that determines whether the ports used by the consul subprocess are still active. The values of e
O3 Security · Impact-Aware SCA

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NeuVector Enforcer is vulnerable to Command Injection…