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The vulnerability of the Web Codecs component in browsers Firefox, Firefox ESR, and the email client Thunderbird allows a hacker to execute arbitrary code.
🗓️ 15 Jun 2026 00:00:00Reported by FSTEC of Russia — Information Security Threat DatabaseType 
bdu_fstec🔗 bdu.fstec.ru👁 1 Views
| Reporter | Title | Published | Views | Family All 232 |
|---|---|---|---|---|
 | CVE-2026-8946 | 19 May 202612:29 | – | attackerkb |
 | Amazon Linux 2023 : firefox (ALAS2023-2026-1793) | 8 Jun 202600:00 | – | nessus |
| Amazon Linux 2 : thunderbird, --advisory ALAS2-2026-3340 (ALAS-2026-3340) | 8 Jun 202600:00 | – | nessus |
| Amazon Linux 2 : firefox, --advisory ALAS2FIREFOX-2026-061 (ALASFIREFOX-2026-061) | 8 Jun 202600:00 | – | nessus |
| AlmaLinux 9 : firefox (ALSA-2026:21378) | 3 Jun 202600:00 | – | nessus |
| AlmaLinux 10 : firefox (ALSA-2026:21380) | 29 May 202600:00 | – | nessus |
| AlmaLinux 9 : thunderbird (ALSA-2026:21381) | 29 May 202600:00 | – | nessus |
| AlmaLinux 8 : firefox (ALSA-2026:21382) | 29 May 202600:00 | – | nessus |
| AlmaLinux 10 : thunderbird (ALSA-2026:22325) | 3 Jun 202600:00 | – | nessus |
| AlmaLinux 8 : thunderbird (ALSA-2026:22643) | 3 Jun 202600:00 | – | nessus |
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15 Jun 2026 00:00Current
6.4Medium risk
Vulners AI Score6.4
CVSS 37.5
CVSS 27.8
EPSS0.0056