PT-2026-40046 · Mozilla+1 · Firefox+1

Andrew Mccreight + 1 · CVE-2026-8401 · Published 2026-05-12 · Updated 2026-06-29

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 150.0.3 Firefox ESR versions prior to 115.36 Firefox ESR versions prior to 140.11

Description A sandbox escape exists in the Profile Backup component. A sandbox is a security mechanism for separating running programs, ensuring that code in a sandbox cannot access resources outside of it.

Recommendations Update to version 150.0.3. Update to ESR version 115.36. Update to ESR version 140.11.

Fix

DoS

Protection Mechanism Failure

Weakness Enumeration

CWE-693

CWE-653

Related Identifiers

ALSA-2026:21378

ALSA-2026:21380

ALSA-2026:21381

ALSA-2026:21382

ALSA-2026:22325

ALSA-2026:22643

CVE-2026-8401

OESA-2026-2392

OESA-2026-2393

OESA-2026-2394

OESA-2026-2465

OPENSUSE-SU-2026:10813-1

OPENSUSE-SU-2026:10864-1

OPENSUSE-SU-2026:21168-1

RHSA-2026:26174

RHSA-2026:26268

RHSA-2026:26269

RHSA-2026:26270

RHSA-2026:26491

RHSA-2026:26492

RHSA-2026:26493

RHSA-2026:26521

RHSA-2026:26536

RHSA-2026:26539

RHSA-2026:26551

RHSA-2026:26606

RHSA-2026:26629

RHSA-2026:26630

RHSA-2026:27715

Affected Products

Firefox

Rocky Linux

References · 197

• https://access.redhat.com/errata/RHSA-2026:26270 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-8947 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-8388 · Security Note
• https://mozilla.org/security/advisories/mfsa2026-51/#CVE-2026-8401 · Vendor Advisory
• https://errata.almalinux.org/10/ALSA-2026-22325.html · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2026-21381.html · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:26539 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2026-21382.html · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-8391 · Security Note
• https://access.redhat.com/errata/RHSA-2026:21380 · Vendor Advisory
• https://mozilla.org/security/advisories/mfsa2026-45 · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:26268 · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:26536 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-2465 · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:22325 · Vendor Advisory