CVE-2026-4688Disclosure(mozilla / firefox)

LOWCVSS 10.0 · CRITICAL

Signal is active with 1 mentions in latest observed window

Immediate actions

Patch mozilla firefox systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.

mozilla CVEs Back to dashboard

0.5/ 10 priority

Sources & remediation

Vendor / third-party advisories

Other references

Weakness type (CWE)

CWE-416CWE-825

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

firefox

Threat summary

Patch or workaround signal is available
5 mentions across 4 observed days
Momentum state: stable

What's happening

Patch or workaround mentioned in 2 signals
Technical details provided in 4 signals
Disclosure: 2 classified signals
General: 1 classified signal
Peaked 3d ago at 2 mentions (2026-03-24); latest day: 1
5 total mentions across 4 days

Affected systems

Vendors

mozilla

Products

firefox

Deep dive

Activity timeline5 mentions / 4d

Signal classification3 categories

Disclosure

240.0%

Patch

240.0%

General

120.0%

Referenced assets3 URLs

By indicator

Classification over time

Date	Total	Labels

2026-03-24	2	Disclosure1Patch1
2026-03-25	1	Disclosure1
2026-03-27	1	General1
2026-03-31	1	Patch1

Full discourse5 posts

Wazuh@wazuh191d
Patch
Mozilla Firefox/Thunderbird are affected by CVE-2026-4688 (CVSS 10 - Critical), a sandbox escape via use-after-free in Disability Access APIs. It affects Firefox below 149, ESR below 140.9 & Thunderbird below 149 & ESR below 140.9. Update now. Read on: https://ow.ly/fzb050YBb0k https://t.co/R9aeBD9LHB
Post summary
CVE‑2026‑4688 is a critical sandbox escape vulnerability affecting Firefox/Thunderbird versions below 149/140.9, and users are urged to update immediately.
01623024.0K
8.0K followersView on X
Orizon@OrizonCyber198d
Patch
🚨 CVE-2026-4688 — CVSS 10/10 ██████████ Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability affects Firefox < 149... Severity: CRITICAL Patch now. #cybersecurity #CVE https://t.co/405qMQjj3i
Post summary
The tweet announces a patch for CVE‑2026‑4688, a critical sandbox escape vulnerability in Firefox caused by use‑after‑free in the Disability Access APIs.
1000150
10 followersView on X
CVE@CVEnew198d
Disclosure
CVE-2026-4688 Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability affects Firefox < 149 and Firefox ESR < 140.9. https://www.cve.org/CVERecord?id=CVE-2026-4688
Post summary
The tweet announces CVE-2026-4688, a sandbox escape vulnerability caused by a use‑after‑free in Firefox’s Disability Access APIs.
00001139
56.8K followersView on X
Nimue@luckyland195d
General
これのことだろうか。10じゃないけど https://www.cve.org/CVERecord?id=CVE-2026-4688
Post summary
The text merely references CVE‑2026‑4688 with a vague question, offering no additional technical, exploit, or patch information.
0000053
380 followersView on X
The Hacker Wire@TheHackerWire198d
Disclosure
🔴 CVE-2026-4688 - Critical Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability affects Firefox &lt; 149, Firefox ESR &lt; 140.9, Thunderbird &lt; 149, and Thunderbird &lt... https://www.thehackerwire.com/vulnerability/CVE-2026-4688/ https://t.co/v6gWwZadho
Post summary
The tweet announces a critical sandbox‑escape vulnerability (CVE-2026-4688) affecting recent Firefox and Thunderbird releases, detailing the use‑after‑free flaw but offering no PoC, exploit, or patch information.
0000066
145 followersView on X

CPE platform detail2 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

2 of 2 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	mozilla	firefox	-	-	-
App	mozilla	firefox	-	-	-

Explore more

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What researchers are saying

CVE-2026-4688

Orizon[verified]@OrizonCyberPatch

The tweet announces a patch for CVE‑2026‑4688, a critical sandbox escape vulnerability in Firefox caused by use‑after‑free in the Disability Access APIs.

Wazuh@wazuhPatch

CVE‑2026‑4688 is a critical sandbox escape vulnerability affecting Firefox/Thunderbird versions below 149/140.9, and users are urged to update immediately.

CVE@CVEnewDisclosure

The tweet announces CVE-2026-4688, a sandbox escape vulnerability caused by a use‑after‑free in Firefox’s Disability Access APIs.

Nimue@luckylandGeneral

The text merely references CVE‑2026‑4688 with a vague question, offering no additional technical, exploit, or patch information.

The Hacker Wire@TheHackerWireDisclosure

The tweet announces a critical sandbox‑escape vulnerability (CVE-2026-4688) affecting recent Firefox and Thunderbird releases, detailing the use‑after‑free flaw but offering no PoC, exploit, or patch information.