---
id: "CVE-2026-117978"
kind: "vulnerability"
aliases: ["CVE-2026-117978"]
title: "Firefox: Graphics boundary error fixed in releases 159 and ESR 153.6"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["browser", "desktop", "firefox", "runtime"]
not_affected_if: []
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-2026-117978", "first_seen_at": "2026-10-27T14:32:24+00:00"}]
---

# Firefox: Graphics boundary error fixed in releases 159 and ESR 153.6

Firefox's Graphics component has an incorrect boundary condition, a memory-handling flaw that the sources do not describe in further detail. The fix ships in Firefox 159, Firefox ESR 115.44 and Firefox ESR 153.6, and the sources do not state what an attacker can gain from it.

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

## How to check

- Run `firefox --version` or open Help > About Firefox and compare against `159`, `115.44` or `153.6` (ESR)
- unknown

## Fix

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

## Timeline

- 2026-10-27T14:32:24+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-117978

## From the sources

Incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, and Firefox ESR 153.6.

---

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