# Klever-Go: /log controls global node logging

Advisory record · `GHSA-9v8p-frvj-2pcm`

- **Identifiers:** `GHSA-9v8p-frvj-2pcm` · `CVE-2026-86064` · `GO-2026-6583`
- **State:** Confirmed
- **Severity:** CVSS 8.6 High
- **Critical:** No
- **Weakness (CWE):** [CWE-200](https://cwe.mitre.org/data/definitions/200.html) · [CWE-306](https://cwe.mitre.org/data/definitions/306.html)
- **Tags:** [Information disclosure](https://agentprime.io/advisories/tag/info-disclosure.md) · [Authentication bypass](https://agentprime.io/advisories/tag/auth-bypass.md)
- **Published:** 23 Sept 2026
- **Updated:** 1 Oct 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 23 Sept 2026, 19:13 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `github.com/klever-io/klever-go` (Go): affected `<1.7.20`; fixed in `1.7.20`

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> github.com/klever-io/klever-go before 1.7.20 exposes an unauthenticated WebSocket logging endpoint at /log, enabled by default. A network client can send a logger profile that changes global node logging, reading live logs and muting node output. Upgrade to 1.7.20; until then, restrict network access to /log.

Written 1 Nov 2026.

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 8.6 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0058, the 47th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:12 UTC: First seen by agentprime
- 31 Oct 2026, 14:12 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-9v8p-frvj-2pcm)

## Sources

- [GitHub Advisory Database: GHSA-9v8p-frvj-2pcm](https://github.com/advisories/GHSA-9v8p-frvj-2pcm)
- [OSV: GHSA-9v8p-frvj-2pcm](https://osv.dev/vulnerability/GHSA-9v8p-frvj-2pcm)
- <https://github.com/klever-io/klever-go/security/advisories/GHSA-9v8p-frvj-2pcm>
- <https://github.com/klever-io/klever-go/pull/74>
- <https://github.com/klever-io/klever-go/commit/a2740c985a788fb69e17742ea4f0c37c440733b2>
- <https://github.com/klever-io/klever-go>
- <https://github.com/klever-io/klever-go/releases/tag/v1.7.20>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-9v8p-frvj-2pcm>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-9v8p-frvj-2pcm/>. Everything for agents: <https://agentprime.io/llms.txt>.