CVE-2026-117878
published 2026-10-27CVE-2026-117878: Other issue, use-after-free in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6…
PriorityP425high7.5
EPSS
0.19%
8.3th percentile
Other issue, use-after-free in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 159 | Firefox 159 |
| mozilla | firefox | — | — |
| mozilla | firefox_esr | < Firefox ESR 115.44 | Firefox ESR 115.44 |
| mozilla | firefox_esr | < Firefox ESR 153.6 | Firefox ESR 153.6 |
| mozilla | thunderbird | < Thunderbird 153.6 | Thunderbird 153.6 |
| mozilla | thunderbird | < Thunderbird 159 | Thunderbird 159 |
| rhel10 | firefox-flatpak | — | — |
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Red Hat
firefox: Other issue, use-after-free in the Storage: IndexedDB component
vendor_redhat·2026-10-27·CVSS 7.5
CVE-2026-117878 [HIGH] CWE-825 firefox: Other issue, use-after-free in the Storage: IndexedDB component
firefox: Other issue, use-after-free in the Storage: IndexedDB component
Other issue, use-after-free in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue:
Other issue, use-after-free in the Storage: IndexedDB component
Statement: Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.
Package: firefox (Red Hat Enterprise Linux 10) - Affected
Package: rhel10/firefox-flatpak (Red Hat Enterprise Linux 10) - Affected
Package: firefox (Red Hat Enterprise Linux 6) - Out of support scope
Package: firefox (Red Hat Enterprise
Mozilla
Mozilla Foundation Security Advisory 2026-119: CVE-2026-117878
vendor_mozilla
CVE-2026-117878 Mozilla Foundation Security Advisory 2026-119: CVE-2026-117878
Mozilla Foundation Security Advisory 2026-119
CVE: CVE-2026-117878
Product: Firefox ESR
Impact: low
Fixed in: Firefox ESR 115.44
Mozilla
Mozilla Foundation Security Advisory 2026-122: CVE-2026-117878
vendor_mozilla
CVE-2026-117878 Mozilla Foundation Security Advisory 2026-122: CVE-2026-117878
Mozilla Foundation Security Advisory 2026-122
CVE: CVE-2026-117878
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 153.6
Mozilla
Mozilla Foundation Security Advisory 2026-118: CVE-2026-117878
vendor_mozilla
CVE-2026-117878 Mozilla Foundation Security Advisory 2026-118: CVE-2026-117878
Mozilla Foundation Security Advisory 2026-118
CVE: CVE-2026-117878
Product: Firefox
Impact: low
Fixed in: Firefox 159
Mozilla
Mozilla Foundation Security Advisory 2026-121: CVE-2026-117878
vendor_mozilla
CVE-2026-117878 Mozilla Foundation Security Advisory 2026-121: CVE-2026-117878
Mozilla Foundation Security Advisory 2026-121
CVE: CVE-2026-117878
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 159
Mozilla
Mozilla Foundation Security Advisory 2026-120: CVE-2026-117878
vendor_mozilla
CVE-2026-117878 Mozilla Foundation Security Advisory 2026-120: CVE-2026-117878
Mozilla Foundation Security Advisory 2026-120
CVE: CVE-2026-117878
Product: Firefox ESR
Impact: low
Fixed in: Firefox ESR 153.6
VulDB
Mozilla Firefox up to 115.43/153.5/158 IndexedDB use after free (Nessus ID 373648)
vuldb·2026-10-30
CVE-2026-117878 [CRITICAL] Mozilla Firefox up to 115.43/153.5/158 IndexedDB use after free (Nessus ID 373648)
A vulnerability was found in Mozilla Firefox up to 115.43/153.5/158. It has been classified as critical. This vulnerability affects unknown code of the component IndexedDB. This manipulation causes use after free.
This vulnerability appears as CVE-2026-117878. The attack may be initiated remotely. There is no available exploit.
Upgrading the affected component is recommended.
GHSA
Other issue, use-after-free in the Storage: IndexedDB component.
ghsa_unreviewed·2026-10-27
CVE-2026-117878 Other issue, use-after-free in the Storage: IndexedDB component.
Other issue, use-after-free in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, and Firefox ESR 153.6.
No detection rules found.
No public exploits indexed.
https://bugzilla.mozilla.org/show_bug.cgi?id=2075431https://www.mozilla.org/security/advisories/mfsa2026-118/https://www.mozilla.org/security/advisories/mfsa2026-119/https://www.mozilla.org/security/advisories/mfsa2026-120/https://www.mozilla.org/security/advisories/mfsa2026-121/https://www.mozilla.org/security/advisories/mfsa2026-122/
2026-10-27
Published