PT-2026-41902 · Mozilla · Thunderbird+1

Satyamasd · Published 2026-05-19 · Updated 2026-06-30 · CVE-2026-8948

Positive Technologies (AI Summary)

CVSS v2.0

9.4

High

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:N

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 151 Thunderbird versions prior to 151

Description A same-origin policy bypass exists in the DOM: Networking component. The same-origin policy is a critical security mechanism that restricts how a document or script loaded from one origin can interact with a resource from another origin.

Recommendations Update to version 151.

Fix

XSS

Weakness Enumeration

CWE-79

CWE-942

Related Identifiers

BDU:2026-08157

CVE-2026-8948

OPENSUSE-SU-2026:10863-1

Affected Products

Firefox

Thunderbird

References · 51

• https://bdu.fstec.ru/vul/2026-08157 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-8948 · Security Note
• https://mozilla.org/security/advisories/mfsa2026-46 · Vendor Advisory
• https://mozilla.org/en-US/security/advisories/mfsa2026-50 · Vendor Advisory
• https://mozilla.org/en-US/security/advisories/mfsa2026-46 · Vendor Advisory
• https://mozilla.org/en-US/security/advisories/mfsa2026-46/#CVE-2026-8948 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-8948 · Security Note
• https://osv.dev/vulnerability/openSUSE-SU-2026:10863-1 · Vendor Advisory
• https://safe-surf.ru/specialists/bulletins-nkcki/733257 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-8948 · Security Note
• https://mozilla.org/security/advisories/mfsa2026-50 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-8948 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-8948 · Vendor Advisory
• https://suse.com/security/cve/CVE-2026-8956 · Note
• https://suse.com/security/cve/CVE-2026-8959 · Note