Red Hat Security Advisory: thunderbird security update
Affects Red Hat thunderbirdSource GCVE Database
Mentioned vulnerabilities
Not known to be exploited.
Data as of 5 Nov 2026, 19:20 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
Exploitation evidence
Disclosed: evidence found.
CVE published 2 Jun 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.
What to do
AI-suggested
Red Hat has released updated Thunderbird packages for Red Hat Enterprise Linux 8.2 that address these vulnerabilities. Users and administrators should apply the provided security update promptly following Red Hat's official guidance at https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the update.
Description
Multiple security vulnerabilities were identified in Mozilla Thunderbird as packaged by Red Hat Enterprise Linux 8.2. These include JavaScript execution via a spoofed PDF attachment and file:/// link, sender spoofing through a malformed From header, unsolicited file download with disk space exhaustion and credential leakage via mailbox:/// links, and tracking links in attachments bypassing remote content blocking. Red Hat has issued an important security update to address these issues.
References
- access.redhat.com/errata/RHSA-2025:8391 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2366283 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2366287 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2366291 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2366297 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2025/rhsa-2025_8391.json (opens in a new tab)