CVE-2026-16381General(mozilla / firefox)

LOWCVSS 9.1 · CRITICAL

Signal is active with 1 mentions in latest observed window

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

Same-origin policy bypass in the Networking: DNS component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.

mozilla CVEs Back to dashboard

0.0/ 10 priority

Sources & remediation

Vendor / third-party advisories

Other references

https://bugzilla.mozilla.org/show_bug.cgi?id=2041001

Weakness type (CWE)

CWE-346

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Are you affected?

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

firefox
thunderbird

Threat summary

1 mentions across 1 observed day

What's happening

General: 1 classified signal
1 total mentions across 1 day

Affected systems

Vendors

mozilla

Products

firefoxthunderbird

Deep dive

Activity timeline1 mentions / 1d

Signal classification1 categories

General

1100.0%

Full discourse1 post

新月@fubukiyokiyoki91d
General
Firefoxに脆弱性を報告し、Firefox 153で4件のCVEが採番されました！・CVE-2026-16380 ・CVE-2026-16381 ・CVE-2026-16400 ・CVE-2026-16406 https://t.co/I01lCCxpmN
Post summary
The tweet announces that four CVEs (CVE-2026-16380, CVE-2026-16381, CVE-2026-16400, CVE-2026-16406) have been assigned to Firefox 153 following a vulnerability report, but no additional details are provided.
91842611716.1K
3.3K followersView on X

CPE platform detail3 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

3 of 3 entries

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

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