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Firefox — security advisories

vendor: Mozilla22 advisories6 exploited7 sourceslatest 2026-09-10⚡ RSS feed

Every advisory CSIRTS.com has correlated to Firefox, newest first — across national CERTs, vendor PSIRTs and vulnerability databases.

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[UPDATE] [hoch] Mozilla Firefox, Firefox ESR und Thunderbird: Mehrere Schwachstellen

highCVE-2026-74934 CVE-2026-74935 CVE-2026-74936 CVE-2026-74937cert-bund2026-09-10

DSA-6481-1 firefox-esr - security update

unknownCVE-2026-16365 CVE-2026-16371 CVE-2026-75874 CVE-2026-84119debian2026-09-02

Mozilla security advisory (AV26-868)

unknowncccs2026-09-01

Mozilla security advisory (AV26-840)

unknowncccs2026-08-21

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

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

Mozilla Firefox Information Disclosure Vulnerability

unknownCVE-2026-18809hkcert2026-08-05

[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 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

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

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

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

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

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

Vulnerability in Mozilla Firefox (July 1, 2026)

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

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

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

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-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