Skip to content
VulniPulse
Sign in
Advisory severityHigh8.8Red Hat Linux

High [CVE-2026-15719] Site isolation issue in the DOM: Navigation component

This high-severity Red Hat Linux advisory covers CVE-2026-15719 affecting Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 7 Extended Lifecycle Support, Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-15719 Source published Source updated

VulniPulse record published Record updated

CVE-2026-15719
Affected products & platforms
Red Hat LinuxRed Hat Enterprise Linux
Open source advisory

Summary

We are aware that exploit code for this is public however we are not aware of any attacks in the wild abusing this flaw. This vulnerability was fixed in Firefox 152.0.6, Firefox ESR 115.38, Firefox ESR 140.13, and Thunderbird 140.13.

Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory. Red Hat severity: Important — CVSS 8.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).

Weakness: CWE-501.

Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On; Red Hat Enterprise Linux 8.8 Telecommunications Update Service; Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions; Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions; Red Hat Enterprise Linux 9.6 Extended Update Support; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7.

Is CVE-2026-15719 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-15719 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-15719?

Upgrade to a fixed release named by Red Hat:

  • 152.0.6
  • 115.38
  • 140.13
  • firefox-0:140.13.0-1.el10_2
  • thunderbird-0:140.13.0-1.el10_2
  • thunderbird-0:140.13.0-1.el10_0
  • firefox-0:140.13.0-1.el10_0
  • firefox-0:140.13.0-1.el7_9
  • firefox-0:140.13.0-1.el8_10
  • thunderbird-0:140.13.0-1.el8_10
  • thunderbird-0:140.13.0-1.el8_4
  • firefox-0:140.13.0-1.el8_4

32 more fixed releases are listed below.

Confirm against the vendor advisory before you patch.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.

Official advisory · high-confidence parse· fetched 22 hours ago·verify at source

Fixed versions
  • 152.0.6
  • 115.38
  • 140.13
  • firefox-0:140.13.0-1.el10_2
  • thunderbird-0:140.13.0-1.el10_2
  • thunderbird-0:140.13.0-1.el10_0
  • firefox-0:140.13.0-1.el10_0
  • firefox-0:140.13.0-1.el7_9
  • firefox-0:140.13.0-1.el8_10
  • thunderbird-0:140.13.0-1.el8_10
  • thunderbird-0:140.13.0-1.el8_4
  • firefox-0:140.13.0-1.el8_4
  • thunderbird-0:140.13.0-1.el8_6
  • firefox-0:140.13.0-1.el8_6
  • thunderbird-0:140.13.0-1.el8_8
  • firefox-0:140.13.0-1.el8_8
  • firefox-0:140.13.0-1.el9_8
  • thunderbird-0:140.13.0-1.el9_8
  • thunderbird-0:140.13.0-1.el9_2
  • firefox-0:140.13.0-1.el9_2
  • thunderbird-0:140.13.0-1.el9_4
  • firefox-0:140.13.0-1.el9_4
  • thunderbird-0:140.13.0-1.el9_6
  • firefox-0:140.13.0-1.el9_6
  • RHSA-2026:47101
  • RHSA-2026:49621
  • RHSA-2026:53445
  • RHSA-2026:54181
  • RHSA-2026:54248
  • RHSA-2026:47105
  • RHSA-2026:49922
  • RHSA-2026:53455
  • RHSA-2026:54180
  • RHSA-2026:53453
  • RHSA-2026:54259
  • RHSA-2026:53454
  • RHSA-2026:54339
  • RHSA-2026:47104
  • RHSA-2026:49921
  • RHSA-2026:53475
  • RHSA-2026:54185
  • RHSA-2026:53444
  • RHSA-2026:54182
  • RHSA-2026:53446

Official advisory · high-confidence parse· fetched 22 hours ago·verify at source

Mitigation

Upgrade to a fixed release: 152.0.6, 115.38, 140.13, firefox-0:140.13.0-1.el10_2, thunderbird-0:140.13.0-1.el10_2, thunderbird-0:140.13.0-1.el10_0. That is the remediation for this advisory.

The vendor advisory may list interim mitigations or workarounds not captured here. Review it before change work.

Official advisory · high-confidence parse· fetched 22 hours ago·verify at source

Get an email when Red Hat RHEL & SELinux publishes the next one.

See Red Hat RHEL & SELinux's last 90 days of advisories first. Then choose one product with live alerts free for life, or a free month of real-time alerts on everything with the severity, the fixed version and the vendor's link (card needed, then US$15/month; we email you before the first charge).

Alert me about Red Hat RHEL & SELinux

More Red Hat Linux advisories

All Red Hat Linux advisories

iPhone and Android apps · New on the App Store

Monitor future Red Hat Linux CVEs from your phone.

Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 34 official vendor sources and 160+ reviewed platform categories.

Download on the App StoreGet CVE alerts on AndroidSee app features

Discussion(0)

No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.

Sign in to join the discussion.