---
id: "CVE-2026-117977"
kind: "vulnerability"
aliases: ["CVE-2026-117977"]
title: "Firefox: Console component flaw fixed in Firefox 159 and ESR 153.6"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["desktop-browsers", "firefox", "other"]
not_affected_if: ["already-on-fixed-version"]
published_at: "2026-10-27T14:16:55+00:00"
first_seen_at: "2026-10-27T14:32:24+00:00"
updated_at: "2026-10-27T14:35:11+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-117977", "first_seen_at": "2026-10-27T14:32:24+00:00"}]
---

# Firefox: Console component flaw fixed in Firefox 159 and ESR 153.6

A flaw in the Console component of Firefox was fixed in Firefox 159 and Firefox ESR 153.6. The sources do not say what an attacker gains from it.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Firefox version in the About Firefox dialog or with `firefox --version`
- unknown

## Fix

- Update Firefox to `159` or later
- Update Firefox ESR to `153.6` or later

## Timeline

- 2026-10-27T14:32:24+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-117977

## From the sources

Other issue in the Console component. This vulnerability was fixed in Firefox 159 and Firefox ESR 153.6.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_