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TI-2026-81333 Aliases CVE-2026-118008GHSA-hm5r-6wjv-xfx3

Privilege escalation in Mozilla Firefox and Thunderbird DOM Navigation

Priority MEDIUM 40CWE-269Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Privilege escalation
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-269.

Summary

Mozilla Firefox and Thunderbird are affected in versions before 159. A flaw in the DOM Navigation component grants attackers elevated privileges, classified as improper privilege management (CWE-269). An unauthenticated remote attacker can exploit it if a user interacts with crafted content, and it can fully compromise confidentiality, integrity and availability.

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

Description from the CNA

Privilege escalation in the DOM: Navigation component. This vulnerability was fixed in Firefox 159 and Thunderbird 159.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0035 28th percentileScored 2026-11-07
Fix Fixed Firefox (Mozilla): 159Thunderbird (Mozilla): 159

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaFirefox—159Patch availableCNA
MozillaThunderbird—159Patch availableCNA
  • Firefox VendorMozilla Affected — Fixed in 159 Patch available CNA
  • Thunderbird VendorMozilla Affected — Fixed in 159 Patch available CNA

CPE names Threatist (inferred) · 2

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*——Mozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*——Mozilla
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions — — ·Mozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions — — ·Mozilla

Remediation

Mozilla Firefox and Thunderbird are fixed in version 159.

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

  • Fix · CNA Firefox (Mozilla) Fixed in 159
  • Fix · CNA Thunderbird (Mozilla) Fixed in 159

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Not affected: 5 products
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-27 Threatist record created from CVE-2026-118008
  2. 2026-10-27 CVSS score added · CISA ADP
  3. 2026-10-27 Weakness changed · CISA ADP
  4. 2026-10-27 CISA SSVC decision points changed
  5. 2026-10-27 Fix available: Mozilla/Thunderbird@159 · CNA
  6. 2026-10-27 1 new reference · CNA
  7. 2026-10-27 Alias added: GHSA-hm5r-6wjv-xfx3
  8. 2026-10-28 CISA SSVC decision points changed
  9. 2026-10-28 Priority changed: LOW → MEDIUM
  10. 2026-11-02 Affected versions changed · Red Hat
  11. 2026-11-02 CVSS score added · Red Hat

References

Other 3

  • TI-2024-08981 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-09832 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.6
  • TI-2019-08769 Improper input validation in Mozilla Firefox ESR KEVCVSS 3.1CRITICAL 10.0
  • TI-2010-03577 Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before… KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-04799 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
  • TI-2023-04477 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
See all 4204 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences