CVE-2026-2762Disclosure(mozilla / firefox)

LOWCVSS 9.8 · 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

Integer overflow in the JavaScript: Standard Library component. This vulnerability was fixed in Firefox 148, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

mozilla CVEs Back to dashboard

0.5/ 10 priority

Sources & remediation

Vendor / third-party advisories

Other references

Weakness type (CWE)

CWE-190

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
thunderbird

Threat summary

Patch or workaround signal is available
5 mentions across 3 observed days
Momentum state: stable

What's happening

Patch or workaround mentioned in 1 signal
Technical details provided in 5 signals
Disclosure: 4 classified signals
Peaked 2d ago at 3 mentions (2026-02-28); latest day: 1
5 total mentions across 3 days

Affected systems

Vendors

mozilla

Products

firefoxthunderbird

Deep dive

Activity timeline5 mentions / 3d

Signal classification2 categories

Disclosure

480.0%

Patch

120.0%

Referenced assets3 URLs

By indicator

Classification over time

Date	Total	Labels

2026-02-28	3	Disclosure3
2026-03-01	1	Disclosure1
2026-04-16	1	Patch1

Full discourse5 posts

Giuseppe Paternicola@giuseppe_1337176d
Patch
🚨 CRITICAL: CVE-2026-2762 (CVSS 9.8) - Integer overflow in Firefox/Thunderbird JavaScript Standard Library. Network exploitable, no user interaction required. Patch NOW to Firefox 148, ESR 140.8, Thunderbird 148/140.8. #CVE #PatchNow #ThreatIntel https://t.co/XjT0UPBPhq
Post summary
The tweet warns of a critical integer overflow in Firefox/Thunderbird that is network‑exploitable without user interaction, urging immediate patching to the latest versions.
0000039
25 followersView on X
CRAC Learning - Tech@cracbot222d
Disclosure
CVE-2026-2762 (CVSS:9.8, CRITICAL) is Modified. Integer overflow in the JavaScript: Standard Library component. This vulnerability affects Firefox < 148, Firefox ESR < ..https://nvd.nist.gov/vuln/detail/CVE-2026-2762 #cybersecurityawareness #cybersecurity #CVE #infosec #hacker #nvd #mitre
Post summary
The post announces CVE-2026-2762, an integer overflow in Firefox's JavaScript standard library, rated critical with CVSS 9.8, affecting versions below 148 and ESR, with no PoC or exploit details provided.
0000027
173 followersView on X
Infoflowcloud@infoflowcloud223d
Disclosure
🚨*CVE* CVE-2026-2762 Integer overflow in the JavaScript: Standard Library component. This vulnerability affects Firefox < 148 and Firefox ESR < 140.8. https://www.cve.org/CVERecord?id=CVE-2026-2762 ----- Traducción: CVE-2026-2762 desbordamiento de entero en el componente Ja… http://infoflow.cloud`
Post summary
The post announces CVE-2026-2762, an integer overflow in Firefox’s JavaScript standard library affecting versions below 148 and ESR below 140.8, with no mention of PoC, exploit, or patch.
0000043
55 followersView on X
CVE@CVEnew223d
Disclosure
CVE-2026-2762 Integer overflow in the JavaScript: Standard Library component. This vulnerability affects Firefox < 148 and Firefox ESR < 140.8. https://www.cve.org/CVERecord?id=CVE-2026-2762
Post summary
CVE-2026-2762 is an integer overflow in Firefox’s JavaScript standard library affecting versions below 148 and ESR below 140.8, with no mention of PoC, exploit, or patch.
00000275
56.6K followersView on X
CRAC Learning - Tech@cracbot223d
Disclosure
CVE-2026-2762 (CVSS:9.8, CRITICAL) is Modified. Integer overflow in the JavaScript: Standard Library component. This vulnerability affects Firefox < 148, Firefox ESR < ..https://nvd.nist.gov/vuln/detail/CVE-2026-2762 #cybersecurityawareness #cybersecurity #CVE #infosec #hacker #nvd #mitre
Post summary
The post announces CVE‑2026‑2762, an integer‑overflow flaw in Firefox’s JavaScript library rated CVSS 9.8, but provides no proof‑of‑concept, exploit code, or mitigation details.
0000033
173 followersView on X

CPE platform detail4 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

4 of 4 entries

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

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What researchers are saying

CVE-2026-2762

Giuseppe Paternicola[verified]@giuseppe_1337Patch

The tweet warns of a critical integer overflow in Firefox/Thunderbird that is network‑exploitable without user interaction, urging immediate patching to the latest versions.

CRAC Learning - Tech@cracbotDisclosure

The post announces CVE-2026-2762, an integer overflow in Firefox's JavaScript standard library, rated critical with CVSS 9.8, affecting versions below 148 and ESR, with no PoC or exploit details provided.

Infoflowcloud@infoflowcloudDisclosure

The post announces CVE-2026-2762, an integer overflow in Firefox’s JavaScript standard library affecting versions below 148 and ESR below 140.8, with no mention of PoC, exploit, or patch.

CVE@CVEnewDisclosure

CVE-2026-2762 is an integer overflow in Firefox’s JavaScript standard library affecting versions below 148 and ESR below 140.8, with no mention of PoC, exploit, or patch.

CRAC Learning - Tech@cracbotDisclosure

The post announces CVE‑2026‑2762, an integer‑overflow flaw in Firefox’s JavaScript library rated CVSS 9.8, but provides no proof‑of‑concept, exploit code, or mitigation details.