InfoSec Signals™
Sign InStart Free
Back to CVE records
Critical 10.0Published Feb 24, 2026

CVE-2026-2768Sandbox escape in the Storage: IndexedDB component

Updated under an hour ago ()

Does this affect you?

It affects Mozilla Firefox and 9 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Sandbox escape in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 148, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

CVSS
10.0 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness (CWE)
CWE-693, CWE-284
Known exploited
Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days)
Not loaded for this CVE
Assigned by
mozilla
NVD analysis
Modified
Record last updated
Jul 14, 2026
First seen by InfoSec Signals
Oct 9, 2026

Affected products

Affected products
Mozilla Firefox
mozilla:firefox (from the name)
140.8 builds before 140.* not affected; from 148 not affected
CNA record
Mozilla Thunderbird
mozilla:thunderbird (from the name)
140.8 builds before 140.* not affected; from 148 not affected
CNA record
from 0:140.8.0-2.el10_1 not affected
CISA ADP
from 0:140.8.0-2.el10_0 not affected
CISA ADP
from 0:140.8.0-2.el7_9 not affected
CISA ADP
from 0:140.8.0-2.el8_2 not affected
CISA ADP
from 0:140.8.0-2.el8_4 not affected
CISA ADP
from 0:140.8.0-2.el8_6 not affected
CISA ADP
from 0:140.8.0-2.el8_6 not affected
CISA ADP
from 0:140.8.0-2.el9_4 not affected
CISA ADP

References

References

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.

Your cookie choices
We use essential cookies to run this site, and, only with your consent, an advertising cookie from Google to measure whether our ads lead to sign-ups and subscriptions. See our for details.