---
id: "CVE-2026-117917"
kind: "vulnerability"
aliases: ["CVE-2026-117917"]
title: "Firefox: invalid pointer in WebRender graphics can crash or be exploited"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["browsers", "desktop", "firefox", "package"]
not_affected_if: ["already-updated-browser"]
published_at: "2026-10-27T14:16:47+00:00"
first_seen_at: "2026-10-27T14:32:22+00:00"
updated_at: "2026-10-27T14:37:22+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-117917", "first_seen_at": "2026-10-27T14:32:22+00:00"}]
---

# Firefox: invalid pointer in WebRender graphics can crash or be exploited

Firefox's WebRender graphics component dereferences an invalid pointer, a memory-safety flaw. The sources do not say what an attacker can achieve beyond that, and the fix ships in Firefox 159 and ESR 115.44 and 153.6.

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

## How to check

- Run `firefox --version` (or check About Firefox) and compare with `159`, `115.44` or `153.6` for ESR
- Confirm the installed ESR branch matches the fixed release line

## Fix

- Update Firefox to `159` or later
- Update Firefox ESR to `115.44` or `153.6`

## Timeline

- 2026-10-27T14:32:22+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-117917

## From the sources

Invalid pointer in the Graphics: WebRender component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, and Firefox ESR 153.6.

---

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