Red Hat Security Advisory: thunderbird security update
Multiple security vulnerabilities affecting Mozilla Thunderbird as packaged by Red Hat Enterprise Linux 8.2 AUS have been addressed. These include memory safety bugs, JavaScript engine flaws, incorrect URL handling in Content Security Policy (CSP) reports, and potential user-assisted code execution via the 'Copy as cURL' command. The update fixes issues that could lead to truncated instructions, partial return values on the stack, CSP bypasses, and execution of javascript: URLs in object/embed tags. Red Hat has released an important security advisory with patches for these issues.
AI Analysis
Technical Summary
Red Hat Product Security issued an advisory (RHSA-2025:13645) for Mozilla Thunderbird in Red Hat Enterprise Linux 8.2 AUS addressing nine CVEs related to Firefox and Thunderbird components. The vulnerabilities include a large branch table leading to truncated instructions (CVE-2025-8028), multiple memory safety bugs (CVE-2025-8035, CVE-2025-8034), incorrect URL stripping in CSP reports (CVE-2025-8031), partial return value writes in the JavaScript engine stack (CVE-2025-8027), potential user-assisted code execution via the 'Copy as cURL' command (CVE-2025-8030), incorrect JavaScript state machine handling for generators (CVE-2025-8033), XSLT documents bypassing CSP (CVE-2025-8032), and execution of javascript: URLs on object and embed tags (CVE-2025-8029). The advisory provides updated Thunderbird packages to remediate these issues.
Potential Impact
The vulnerabilities collectively pose risks including memory corruption, potential code execution with user assistance, bypass of security policies like CSP, and improper handling of JavaScript execution contexts. These could lead to compromised confidentiality, integrity, or availability of the affected Thunderbird client. However, no known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released updated Thunderbird packages for Red Hat Enterprise Linux 8.2 AUS that address these vulnerabilities. Users should apply the security update as detailed in Red Hat advisory RHSA-2025:13645 and the referenced article https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the official patches.
Red Hat Security Advisory: thunderbird security update
Description
Multiple security vulnerabilities affecting Mozilla Thunderbird as packaged by Red Hat Enterprise Linux 8.2 AUS have been addressed. These include memory safety bugs, JavaScript engine flaws, incorrect URL handling in Content Security Policy (CSP) reports, and potential user-assisted code execution via the 'Copy as cURL' command. The update fixes issues that could lead to truncated instructions, partial return values on the stack, CSP bypasses, and execution of javascript: URLs in object/embed tags. Red Hat has released an important security advisory with patches for these issues.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Red Hat Product Security issued an advisory (RHSA-2025:13645) for Mozilla Thunderbird in Red Hat Enterprise Linux 8.2 AUS addressing nine CVEs related to Firefox and Thunderbird components. The vulnerabilities include a large branch table leading to truncated instructions (CVE-2025-8028), multiple memory safety bugs (CVE-2025-8035, CVE-2025-8034), incorrect URL stripping in CSP reports (CVE-2025-8031), partial return value writes in the JavaScript engine stack (CVE-2025-8027), potential user-assisted code execution via the 'Copy as cURL' command (CVE-2025-8030), incorrect JavaScript state machine handling for generators (CVE-2025-8033), XSLT documents bypassing CSP (CVE-2025-8032), and execution of javascript: URLs on object and embed tags (CVE-2025-8029). The advisory provides updated Thunderbird packages to remediate these issues.
Potential Impact
The vulnerabilities collectively pose risks including memory corruption, potential code execution with user assistance, bypass of security policies like CSP, and improper handling of JavaScript execution contexts. These could lead to compromised confidentiality, integrity, or availability of the affected Thunderbird client. However, no known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released updated Thunderbird packages for Red Hat Enterprise Linux 8.2 AUS that address these vulnerabilities. Users should apply the security update as detailed in Red Hat advisory RHSA-2025:13645 and the referenced article https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the official patches.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2025:13645
- Cve Count
- 9
- Additional Cves
- ["CVE-2025-8028","CVE-2025-8029","CVE-2025-8030","CVE-2025-8031","CVE-2025-8032","CVE-2025-8033","CVE-2025-8034","CVE-2025-8035"]
- Cvss Version
- null
Threat ID: 6a3cc29d4853345fc16d3a60
Added to database: 06/25/2026, 05:54:37 UTC
Last enriched: 06/25/2026, 06:03:15 UTC
Last updated: 06/25/2026, 20:01:03 UTC
Views: 6
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