Mozilla — security advisories

50 advisories13 exploitedlatest 2026-08-25⚡ RSS feed

Tracked Mozilla products:

Firefox, SeaMonkey, Thunderbird Firefox Firefox, Firefox ESR, Thunderbird Firefox and Thunderbird Mozilla Products Firefox, Thunderbird Firefox, Firefox ESR and Thunderbird Firefox for iOS Thunderbird Mozilla Firefox and Firefox ESR Mozilla Thunderbird, Firefox ESR and Firefox Firefox and Firefox ESR Firefox ESR nss Firefox for Android

⚡ Watch Mozilla

Get an email when a new Mozilla advisory drops — max one per day, one-click unsubscribe.

[NEW] [high] Mozilla Firefox, Firefox ESR and Thunderbird: Multiple Vulnerabilities

highCVE-2026-74934 CVE-2026-74935 CVE-2026-74936 CVE-2026-74937cert-bund2026-08-25

DSA-6461-1 thunderbird - security update

unknownCVE-2026-74934 CVE-2026-74935 CVE-2026-74936 CVE-2026-74939debian2026-08-23

Mozilla security advisory (AV26-840)

unknowncccs2026-08-21

Mozilla Products Multiple Vulnerabilities

unknownCVE-2026-74934 CVE-2026-74935 CVE-2026-74936 CVE-2026-74937hkcert2026-08-19

DSA-6451-1 firefox-esr - security update

unknownCVE-2026-74934 CVE-2026-74935 CVE-2026-74936 CVE-2026-74939debian2026-08-19

Multiple vulnerabilities in Mozilla products (August 19, 2026)

unknownCVE-2026-74973 CVE-2026-74966 CVE-2026-74944 CVE-2026-74936cert-fr-avis2026-08-19

[NEW] [high] Mozilla Firefox and Firefox ESR: Multiple vulnerabilities

highCVE-2026-15718 CVE-2026-15719 CVE-2026-16349 CVE-2026-16350cert-bund2026-08-18

[UPDATE] [medium] Mozilla Thunderbird: Multiple vulnerabilities

mediumCVE-2026-57962 CVE-2026-57963cert-bund2026-08-18

[NEW] [medium] Mozilla Firefox: Multiple vulnerabilities allow unspecified attack

mediumCVE-2026-15718 CVE-2026-15719cert-bund2026-08-17

[UPDATE] [high] Mozilla Firefox, Firefox ESR and Thunderbird: Multiple vulnerabilities

highCVE-2026-12289 CVE-2026-12290 CVE-2026-12291 CVE-2026-12292cert-bund2026-08-17

DSA-6418-1 thunderbird - security update

unknownCVE-2026-14899 CVE-2026-15718 CVE-2026-15719 CVE-2026-16349debian2026-08-07

[NEW] [medium] Mozilla Firefox for Android: Vulnerability Enables Information Disclosure

mediumCVE-2026-18809cert-bund2026-08-05

Mozilla Firefox Information Disclosure Vulnerability

unknownCVE-2026-18809hkcert2026-08-05

Vulnerability in Mozilla Firefox for Android (August 5, 2026)

unknownCVE-2026-18809cert-fr-avis2026-08-05

DSA-6403-1 nss - security update

unknownCVE-2026-16389debian2026-07-29

Multiple vulnerabilities in Mozilla Thunderbird (July 23, 2026)

unknownCVE-2026-16354 CVE-2026-16359 CVE-2026-15719 CVE-2026-16409cert-fr-avis2026-07-23

[UPDATE] [high] Mozilla Thunderbird, Firefox ESR and Firefox: Multiple vulnerabilities

highCVE-2026-6748 CVE-2026-6750 CVE-2026-33626 CVE-2026-2781cert-bund2026-07-22

[UPDATE] [high] Mozilla Firefox and Firefox ESR: Multiple vulnerabilities

highCVE-2026-7320 CVE-2026-7321 CVE-2026-7322 CVE-2026-7323cert-bund2026-07-22

Mozilla Products Multiple Vulnerabilities

unknownCVE-2026-15718 CVE-2026-15719 CVE-2026-16349 CVE-2026-16350hkcert2026-07-22

Multiple vulnerabilities in Mozilla products (July 22, 2026)

unknownCVE-2026-16354 CVE-2026-16359 CVE-2026-15719 CVE-2026-16409cert-fr-avis2026-07-22

DSA-6394-1 firefox-esr - security update

unknownCVE-2026-15718 CVE-2026-15719 CVE-2026-16349 CVE-2026-16350debian2026-07-22

Mozilla security advisory (AV26-726)

criticalcccs2026-07-21

[UPDATE] [high] Mozilla Firefox and Thunderbird: Multiple vulnerabilities

highCVE-2026-8388 CVE-2026-8391 CVE-2026-8401 CVE-2026-8706cert-bund2026-07-21

[UPDATE] [high] Mozilla Firefox: Multiple vulnerabilities

highCVE-2026-8388 CVE-2026-8389 CVE-2026-8390 CVE-2026-8391cert-bund2026-07-21

[UPDATE] [medium] Mozilla Firefox and Firefox ESR: Multiple vulnerabilities

mediumCVE-2026-8090 CVE-2026-8091 CVE-2026-8092 CVE-2026-8093cert-bund2026-07-21

NCSC-2026-0242 [1.00] [M/H] Vulnerabilities fixed in Mozilla Firefox

unknownCVE-2026-15719 CVE-2026-15718ncsc-nl2026-07-16

Mozilla Products Multiple Vulnerabilities

unknownCVE-2026-15718 CVE-2026-15719 CVE-2026-14906hkcert2026-07-15

Multiple Vulnerabilities in Mozilla Firefox (July 15, 2026)

unknownCVE-2026-15719 CVE-2026-14906 CVE-2026-15718cert-fr-avis2026-07-15

Mozilla security advisory (AV26-692)

criticalcccs2026-07-14

[NEW] [medium] Mozilla Firefox: Vulnerability allows file manipulation

mediumCVE-2026-14906cert-bund2026-07-14

[NEW] [medium] Mozilla Firefox for iOS: Vulnerability allows display of false information

mediumCVE-2026-13356cert-bund2026-07-07

Vulnerability in Mozilla Firefox for iOS (July 7, 2026)

unknownCVE-2026-13356cert-fr-avis2026-07-07

[UPDATE] [high] Mozilla Firefox: Vulnerability allows code execution

highCVE-2026-14241cert-bund2026-07-02

Mozilla Products Multiple Vulnerabilities

unknownCVE-2026-14241 CVE-2026-57962 CVE-2026-57963hkcert2026-07-02

Multiple vulnerabilities in Mozilla Thunderbird (July 2, 2026)

unknownCVE-2026-57963 CVE-2026-57962cert-fr-avis2026-07-02

Vulnerability in Mozilla Firefox (July 1, 2026)

unknownCVE-2026-14241cert-fr-avis2026-07-01

Mozilla security advisory (AV26-644)

unknowncccs2026-06-30

CVE-2010-3765: Mozilla Multiple Products Remote Code Execution Vulnerability

criticalexploitedCVE-2010-3765cisa-kev2025-10-06

CVE-2024-9680: Mozilla Firefox Use-After-Free Vulnerability

criticalexploitedCVE-2024-9680cisa-kev2024-10-15

CVE-2016-9079: Mozilla Firefox, Firefox ESR, and Thunderbird Use-After-Free Vulnerability

criticalexploitedCVE-2016-9079cisa-kev2023-06-22

CVE-2015-4495: Mozilla Firefox Security Feature Bypass Vulnerability

criticalexploitedCVE-2015-4495cisa-kev2022-05-25

CVE-2019-11708: Mozilla Firefox and Thunderbird Sandbox Escape Vulnerability

criticalexploitedCVE-2019-11708cisa-kev2022-05-23

CVE-2019-11707: Mozilla Firefox and Thunderbird Type Confusion Vulnerability

criticalexploitedCVE-2019-11707cisa-kev2022-05-23

CVE-2013-1690: Mozilla Firefox and Thunderbird Denial-of-Service Vulnerability

criticalexploitedCVE-2013-1690cisa-kev2022-03-28

CVE-2022-26486: Mozilla Firefox Use-After-Free Vulnerability

criticalexploitedCVE-2022-26486cisa-kev2022-03-07

CVE-2022-26485: Mozilla Firefox Use-After-Free Vulnerability

criticalexploitedCVE-2022-26485cisa-kev2022-03-07

CVE-2013-1675: Mozilla Firefox Information Disclosure Vulnerability

criticalexploitedCVE-2013-1675cisa-kev2022-03-03

CVE-2019-17026: Mozilla Firefox And Thunderbird Type Confusion Vulnerability

criticalexploitedCVE-2019-17026cisa-kev2021-11-03

CVE-2020-6820: Mozilla Firefox And Thunderbird Use-After-Free Vulnerability

criticalexploitedCVE-2020-6820cisa-kev2021-11-03

CVE-2020-6819: Mozilla Firefox And Thunderbird Use-After-Free Vulnerability

criticalexploitedCVE-2020-6819cisa-kev2021-11-03