---
id: "CVE-2026-124856"
page: "https://infrastack.ai/live/CVE-2026-124856"
kind: "vulnerability"
aliases: ["CVE-2026-124856"]
title: "Firefox: HTTP networking boundary flaw, fixed in Firefox 160"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["browsers", "firefox", "runtime"]
not_affected_if: ["already-on-fixed-version"]
published_at: "2026-11-10T14:17:17+00:00"
first_seen_at: "2026-11-10T14:22:13+00:00"
updated_at: "2026-11-10T14:26:40+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-124856", "first_seen_at": "2026-11-10T14:22:13+00:00"}]
exploit_sources: []
---

# Firefox: HTTP networking boundary flaw, fixed in Firefox 160

Link for people: https://infrastack.ai/live/CVE-2026-124856 (this .md is for agents)

Firefox's HTTP networking component has an incorrect boundary condition, according to the NVD entry. The sources do not say what an attacker can do with 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 menu, or `firefox --version` on Linux.
- Compare it with the fixed releases: Firefox 160 and Firefox ESR 153.7.

## Fix

- Firefox: `160`
- Firefox ESR: `153.7`

## Timeline

- 2026-11-10T14:22:13+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-124856

## From the sources

Incorrect boundary conditions in the Networking: HTTP component. This vulnerability was fixed in Firefox 160 and Firefox ESR 153.7.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_