Mozilla Firefox Esr vulnerabilities
1,297 known vulnerabilities affecting mozilla/firefox_esr.
Total CVEs
1,297
CISA KEV
9
actively exploited
Public exploits
20
Exploited in wild
16
Severity breakdown
CRITICAL214HIGH400MEDIUM327LOW6UNKNOWN350
Vulnerabilities
Page 21 of 65
CVE-2026-100781P3UNKNOWNfixed in Firefox ESR 140.17
CVE-2026-100781 Mozilla Foundation Security Advisory 2026-99: CVE-2026-100781
Mozilla Foundation Security Advisory 2026-99
CVE: CVE-2026-100781
Product: Firefox ESR
Impact: moderate
Fixed in: Firefox ESR 140.17
mozilla
CVE-2026-92032P3UNKNOWNfixed in Firefox ESR 153.3
CVE-2026-92032 Mozilla Foundation Security Advisory 2026-93: CVE-2026-92032
Mozilla Foundation Security Advisory 2026-93
CVE: CVE-2026-92032
Product: Firefox ESR
Impact: low
Fixed in: Firefox ESR 153.3
mozilla
CVE-2026-100794P3UNKNOWNfixed in Firefox ESR 140.17
CVE-2026-100794 Mozilla Foundation Security Advisory 2026-99: CVE-2026-100794
Mozilla Foundation Security Advisory 2026-99
CVE: CVE-2026-100794
Product: Firefox ESR
Impact: moderate
Fixed in: Firefox ESR 140.17
mozilla
CVE-2026-92028P3UNKNOWNfixed in Firefox ESR 115.41
CVE-2026-92028 Mozilla Foundation Security Advisory 2026-91: CVE-2026-92028
Mozilla Foundation Security Advisory 2026-91
CVE: CVE-2026-92028
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 115.41
mozilla
CVE-2026-92022P3UNKNOWNfixed in Firefox ESR 115.41
CVE-2026-92022 Mozilla Foundation Security Advisory 2026-91: CVE-2026-92022
Mozilla Foundation Security Advisory 2026-91
CVE: CVE-2026-92022
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 115.41
mozilla
CVE-2026-92026P3UNKNOWNfixed in Firefox ESR 140.16
CVE-2026-92026 Mozilla Foundation Security Advisory 2026-92: CVE-2026-92026
Mozilla Foundation Security Advisory 2026-92
CVE: CVE-2026-92026
Product: Firefox ESR
Impact: moderate
Fixed in: Firefox ESR 140.16
mozilla
CVE-2026-100758P3UNKNOWNfixed in Firefox ESR 115.42
CVE-2026-100758 Mozilla Foundation Security Advisory 2026-98: CVE-2026-100758
Mozilla Foundation Security Advisory 2026-98
CVE: CVE-2026-100758
Product: Firefox ESR
Impact: moderate
Fixed in: Firefox ESR 115.42
mozilla
CVE-2026-92045P3UNKNOWNfixed in Firefox ESR 153.3
CVE-2026-92045 Mozilla Foundation Security Advisory 2026-93: CVE-2026-92045
Mozilla Foundation Security Advisory 2026-93
CVE: CVE-2026-92045
Product: Firefox ESR
Impact: low
Fixed in: Firefox ESR 153.3
mozilla
CVE-2026-92048P3UNKNOWNfixed in Firefox ESR 153.3
CVE-2026-92048 Mozilla Foundation Security Advisory 2026-93: CVE-2026-92048
Mozilla Foundation Security Advisory 2026-93
CVE: CVE-2026-92048
Product: Firefox ESR
Impact: low
Fixed in: Firefox ESR 153.3
mozilla
CVE-2026-92021P3UNKNOWNfixed in Firefox ESR 140.16
CVE-2026-92021 Mozilla Foundation Security Advisory 2026-92: CVE-2026-92021
Mozilla Foundation Security Advisory 2026-92
CVE: CVE-2026-92021
Product: Firefox ESR
Impact: moderate
Fixed in: Firefox ESR 140.16
mozilla
CVE-2026-92071P3UNKNOWNfixed in Firefox ESR 153.3
CVE-2026-92071 Mozilla Foundation Security Advisory 2026-93: CVE-2026-92071
Mozilla Foundation Security Advisory 2026-93
CVE: CVE-2026-92071
Product: Firefox ESR
Impact: low
Fixed in: Firefox ESR 153.3
mozilla
CVE-2026-92060P3UNKNOWNfixed in Firefox ESR 153.3
CVE-2026-92060 Mozilla Foundation Security Advisory 2026-93: CVE-2026-92060
Mozilla Foundation Security Advisory 2026-93
CVE: CVE-2026-92060
Product: Firefox ESR
Impact: low
Fixed in: Firefox ESR 153.3
mozilla
CVE-2026-92058P3UNKNOWNfixed in Firefox ESR 153.3
CVE-2026-92058 Mozilla Foundation Security Advisory 2026-93: CVE-2026-92058
Mozilla Foundation Security Advisory 2026-93
CVE: CVE-2026-92058
Product: Firefox ESR
Impact: low
Fixed in: Firefox ESR 153.3
mozilla
CVE-2026-92056P3UNKNOWNfixed in Firefox ESR 153.3
CVE-2026-92056 Mozilla Foundation Security Advisory 2026-93: CVE-2026-92056
Mozilla Foundation Security Advisory 2026-93
CVE: CVE-2026-92056
Product: Firefox ESR
Impact: low
Fixed in: Firefox ESR 153.3
mozilla
CVE-2026-92049P3UNKNOWNfixed in Firefox ESR 153.3
CVE-2026-92049 Mozilla Foundation Security Advisory 2026-93: CVE-2026-92049
Mozilla Foundation Security Advisory 2026-93
CVE: CVE-2026-92049
Product: Firefox ESR
Impact: low
Fixed in: Firefox ESR 153.3
mozilla
CVE-2026-92067P3UNKNOWNfixed in Firefox ESR 153.3
CVE-2026-92067 Mozilla Foundation Security Advisory 2026-93: CVE-2026-92067
Mozilla Foundation Security Advisory 2026-93
CVE: CVE-2026-92067
Product: Firefox ESR
Impact: low
Fixed in: Firefox ESR 153.3
mozilla
CVE-2026-92074P3UNKNOWNfixed in Firefox ESR 153.3
CVE-2026-92074 Mozilla Foundation Security Advisory 2026-93: CVE-2026-92074
Mozilla Foundation Security Advisory 2026-93
CVE: CVE-2026-92074
Product: Firefox ESR
Impact: low
Fixed in: Firefox ESR 153.3
mozilla
CVE-2026-92076P3UNKNOWNfixed in Firefox ESR 153.3
CVE-2026-92076 Mozilla Foundation Security Advisory 2026-93: CVE-2026-92076
Mozilla Foundation Security Advisory 2026-93
CVE: CVE-2026-92076
Product: Firefox ESR
Impact: low
Fixed in: Firefox ESR 153.3
mozilla
CVE-2018-12391P3HIGHCVSS 8.8fixed in 60.3≥ unspecified, < 60.32019-02-28
CVE-2018-12391 [HIGH] CWE-863 CVE-2018-12391: During HTTP Live Stream playback on Firefox for Android, audio data can be accessed across origins i
During HTTP Live Stream playback on Firefox for Android, audio data can be accessed across origins in violation of security policies. Because the problem is in the underlying Android service, this issue is addressed by treating all HLS streams as cross-origin and opaque to access. *Note: this issue only affects Firefox for Android. Desktop versions of
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CVE-2020-15673P3HIGHCVSS 8.8fixed in 78.3≥ unspecified, < 78.32020-10-01
CVE-2020-15673 [HIGH] CWE-416 CVE-2020-15673: Mozilla developers reported memory safety bugs present in Firefox 80 and Firefox ESR 78.2. Some of t
Mozilla developers reported memory safety bugs present in Firefox 80 and Firefox ESR 78.2. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 81, Thunderbird < 78.3, and Firefox ESR < 78.3.
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