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Register Tracker canaries (EasyPrivacy) 202610271409: first version Tue 27 Oct·Ad canaries (EasyList) 202610271405: 2 changed Tue 27 Oct·NIST SP 800-171 Rev 3 (CUI; CMMC Level 2) OSCAL 1.1.0: first version 22 Oct·the register

News · Mozilla Foundation Security Advisories

All News Vendor advisories Known exploited Notable CVEs Releases Unread only

Mozilla Foundation Security Advisories 16 Jun

MFSA 2026-57: Security Vulnerabilities fixed in Firefox 152

Impact high. Firefox 152.
Mozilla Foundation Security Advisories 16 Jun

MFSA 2026-58: Security Vulnerabilities fixed in Firefox ESR 140.12

Impact high. Firefox ESR 140.12.
Mozilla Foundation Security Advisories 16 Jun

MFSA 2026-59: Security Vulnerabilities fixed in Firefox ESR 115.37

Impact high. Firefox ESR 115.37.
Mozilla Foundation Security Advisories 16 Jun

MFSA 2026-60: Security Vulnerabilities fixed in Thunderbird 152

Impact high. Thunderbird 152.
Mozilla Foundation Security Advisories 16 Jun

MFSA 2026-61: Security Vulnerabilities fixed in Thunderbird 140.12

Impact high. Thunderbird 140.12.
Mozilla Foundation Security Advisories 25 May

MFSA 2026-52: Security Vulnerabilities fixed in Firefox for iOS 151.1

Impact low. Firefox for iOS 151.1.
Mozilla Foundation Security Advisories 19 May

MFSA 2026-46: Security Vulnerabilities fixed in Firefox 151

Impact high. Firefox 151.
Mozilla Foundation Security Advisories 19 May

MFSA 2026-47: Security Vulnerabilities fixed in Firefox ESR 115.36

Impact high. Firefox ESR 115.36.
Mozilla Foundation Security Advisories 19 May

MFSA 2026-48: Security Vulnerabilities fixed in Firefox ESR 140.11

Impact high. Firefox ESR 140.11.
Mozilla Foundation Security Advisories 19 May

MFSA 2026-49: Security Vulnerabilities fixed in Firefox for iOS 151.0

Impact high. Firefox for iOS 151.0.
Mozilla Foundation Security Advisories 19 May

MFSA 2026-50: Security Vulnerabilities fixed in Thunderbird 151

Impact high. Thunderbird 151.
Mozilla Foundation Security Advisories 19 May

MFSA 2026-51: Security Vulnerabilities fixed in Thunderbird 140.11

Impact high. Thunderbird 140.11.
Mozilla Foundation Security Advisories 12 May

MFSA 2026-45: Security Vulnerabilities fixed in Firefox 150.0.3

Impact high. Firefox 150.0.3.
Mozilla Foundation Security Advisories 30 Apr

MFSA 2026-38: Security Vulnerabilities fixed in Thunderbird 150.0.1

Impact high. Thunderbird 150.0.1.
Mozilla Foundation Security Advisories 30 Apr

MFSA 2026-39: Security Vulnerabilities fixed in Thunderbird 140.10.1

Impact high. Thunderbird 140.10.1.
Mozilla Foundation Security Advisories 28 Apr

MFSA 2026-35: Security Vulnerabilities fixed in Firefox 150.0.1

Impact high. Firefox 150.0.1.
Mozilla Foundation Security Advisories 28 Apr

MFSA 2026-36: Security Vulnerabilities fixed in Firefox ESR 140.10.1

Impact high. Firefox ESR 140.10.1.
Mozilla Foundation Security Advisories 28 Apr

MFSA 2026-37: Security Vulnerabilities fixed in Firefox ESR 115.35.1

Impact high. Firefox ESR 115.35.1.
Mozilla Foundation Security Advisories 21 Apr

MFSA 2026-30: Security Vulnerabilities fixed in Firefox 150

Impact high. Firefox 150.
Mozilla Foundation Security Advisories 21 Apr

MFSA 2026-31: Security Vulnerabilities fixed in Firefox ESR 115.35

Impact high. Firefox ESR 115.35.
Mozilla Foundation Security Advisories 21 Apr

MFSA 2026-32: Security Vulnerabilities fixed in Firefox ESR 140.10

Impact high. Firefox ESR 140.10.
Mozilla Foundation Security Advisories 21 Apr

MFSA 2026-33: Security Vulnerabilities fixed in Thunderbird 150

Impact high. Thunderbird 150.
Mozilla Foundation Security Advisories 21 Apr

MFSA 2026-34: Security Vulnerabilities fixed in Thunderbird 140.10

Impact high. Thunderbird 140.10.
Mozilla Foundation Security Advisories 24 Mar

MFSA 2026-20: Security Vulnerabilities fixed in Firefox 149

Impact high. Firefox 149.
Mozilla Foundation Security Advisories 24 Mar

MFSA 2026-21: Security Vulnerabilities fixed in Firefox ESR 115.34

Impact high. Firefox ESR 115.34.
Mozilla Foundation Security Advisories 24 Mar

MFSA 2026-22: Security Vulnerabilities fixed in Firefox ESR 140.9

Impact high. Firefox ESR 140.9.
Mozilla Foundation Security Advisories 24 Mar

MFSA 2026-23: Security Vulnerabilities fixed in Thunderbird 149

Impact high. Thunderbird 149.
Mozilla Foundation Security Advisories 24 Mar

MFSA 2026-24: Security Vulnerabilities fixed in Thunderbird 140.9

Impact high. Thunderbird 140.9.
Mozilla Foundation Security Advisories 10 Mar

MFSA 2026-19: Security Vulnerabilities fixed in Firefox 148.0.2

Impact high. Firefox 148.0.2.
Mozilla Foundation Security Advisories 24 Feb

MFSA 2026-13: Security Vulnerabilities fixed in Firefox 148

Impact high. Firefox 148.
Mozilla Foundation Security Advisories 24 Feb

MFSA 2026-14: Security Vulnerabilities fixed in Firefox ESR 115.33

Impact high. Firefox ESR 115.33.
Mozilla Foundation Security Advisories 24 Feb

MFSA 2026-15: Security Vulnerabilities fixed in Firefox ESR 140.8

Impact high. Firefox ESR 140.8.
Mozilla Foundation Security Advisories 24 Feb

MFSA 2026-16: Security Vulnerabilities fixed in Thunderbird 148

Impact high. Thunderbird 148.
Mozilla Foundation Security Advisories 24 Feb

MFSA 2026-17: Security Vulnerabilities fixed in Thunderbird 140.8

Impact high. Thunderbird 140.8.
Mozilla Foundation Security Advisories 20 Feb

MFSA 2026-12: Security Vulnerabilities fixed in Firefox for iOS 147.4

Impact high. Firefox for iOS 147.4.
Mozilla Foundation Security Advisories 16 Feb

MFSA 2026-11: Security Vulnerabilities fixed in Thunderbird 147.0.2 and 140.7.2

Impact high. Thunderbird 147.0.2 and 140.7.2.