CVE-2026-109777: Information disclosure in the Storage: IndexedDB component
Information disclosure in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
Other sources
Information disclosure in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 158 and Firefox ESR 153.5.
— Red Hat
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 153.5 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 158 - Upgrade
Upgrade
debian/firefoxto a version that resolves this vulnerability.Fixed in 159.0-1 - Upgrade
Upgrade
debian/firefox-esrto a version that resolves this vulnerability.Fixed in 153.6.0esr-1~deb12u2Fixed in 153.6.0esr-1~deb13u1Fixed in 153.5.1esr-1Fixed in 153.6.0esr-1 - Upgrade
Upgrade
debian/thunderbirdto a version that resolves this vulnerability.Fixed in 1:153.6.0esr-1~deb12u2Fixed in 1:153.6.0esr-1~deb13u1Fixed in 1:153.5.0esr-1Fixed in 1:153.6.0esr-1 - Upgrade
Upgrade
Firefoxto a version that resolves this vulnerability.Fixed in 158 - Upgrade
Upgrade
Firefox ESRto a version that resolves this vulnerability.Fixed in 153.5 - Upgrade
Upgrade
Thunderbirdto a version that resolves this vulnerability.Fixed in 158 - Upgrade
Upgrade
Thunderbird ESRto a version that resolves this vulnerability.Fixed in 153.5
Event History
Parent advisories
This vulnerability appears in the following advisories.
Peer vulnerabilities
Found alongside the following vulnerabilities.
- CVE-2026-110249
- CVE-2026-109704
- CVE-2026-109705
- CVE-2026-109706
- CVE-2026-109707
- CVE-2026-109708
- CVE-2026-109709
- CVE-2026-109710
- CVE-2026-109711
- CVE-2026-109712
- CVE-2026-109713
- CVE-2026-109715
- CVE-2026-109716
- CVE-2026-109717
- CVE-2026-109718
- CVE-2026-109719
- CVE-2026-109720
- CVE-2026-109721
- CVE-2026-109722
- CVE-2026-109723
- CVE-2026-109724
- CVE-2026-109725
- CVE-2026-109726
- CVE-2026-109727
- CVE-2026-109728
- CVE-2026-109729
- CVE-2026-109730
- CVE-2026-109731
- CVE-2026-109732
- CVE-2026-109733
- CVE-2026-109734
- CVE-2026-109736
- CVE-2026-109737
- CVE-2026-109738
- CVE-2026-109740
- CVE-2026-109741
- CVE-2026-109742
- CVE-2026-109743
- CVE-2026-109744
- CVE-2026-109745
- CVE-2026-109782
- CVE-2026-109751
- CVE-2026-109752
- CVE-2026-109753
- CVE-2026-109754
- CVE-2026-109756
- CVE-2026-109757
- CVE-2026-109759
- CVE-2026-109760
- CVE-2026-109762
- CVE-2026-109763
- CVE-2026-109764
- CVE-2026-109765
- CVE-2026-109766
- CVE-2026-109767
- CVE-2026-109783
- CVE-2026-109770
- CVE-2026-109775
- CVE-2026-109776
- CVE-2026-109777
- CVE-2026-109778
- CVE-2026-109781
- CVE-2026-109714
- CVE-2026-109735
- CVE-2026-109739
- CVE-2026-109746
- CVE-2026-109747
- CVE-2026-109748
- CVE-2026-109749
- CVE-2026-109750
- CVE-2026-109755
- CVE-2026-109761
- CVE-2026-109768
- CVE-2026-109769
- CVE-2026-109771
- CVE-2026-109772
- CVE-2026-109773
- CVE-2026-109774
- CVE-2026-109779
- CVE-2026-109780
- CVE-2026-110247
- CVE-2026-106016
- DLA-4836-1
- DLA-4863-1
Frequently Asked Questions
Which Firefox releases contain the fix?
The issue was fixed in Firefox 158 and Firefox ESR 153.5.
Does exploitation require an authenticated or privileged attacker?
No. The CVSS vector indicates network reachability, low attack complexity, and no privileges required, but user interaction is required.
What is the expected security impact?
The reported impact is limited to confidentiality: low-severity information disclosure, with no integrity or availability impact indicated by the CVSS vector.