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TI-2016-04587 Aliases CVE-2016-5291GHSA-5rpq-63gx-j9m8

Improper input validation in Mozilla Thunderbird

Priority LOW 25CWE-20Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat.

Summary

A same-origin policy bypass with local shortcut files to load arbitrary local content from disk. This vulnerability affects Thunderbird < 45.5, Firefox ESR < 45.5, and Firefox < 50.

Why it matters now

EPSS 0.00433 37th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Thunderbird (Mozilla): 45.5Firefox ESR (Mozilla): 45.5+1 more productRed Hat: 1 advisory

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaThunderbirdbefore 45.545.5Patch availableCNA
MozillaFirefox ESRbefore 45.545.5Patch availableCNA
MozillaFirefoxbefore 5050Patch availableCNA
  • Thunderbird VendorMozilla Affected before 45.5 Fixed in 45.5 Patch available CNA
  • Firefox ESR VendorMozilla Affected before 45.5 Fixed in 45.5 Patch available CNA
  • Firefox VendorMozilla Affected before 50 Fixed in 50 Patch available CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*before 45.5.0; before 50.0VulnerableMozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*before 45.5.0VulnerableMozilla
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*8.0VulnerableDebian
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 45.5.0; before 50.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 45.5.0 Vulnerable ·Mozilla
  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian

Remediation

  • Fix · CNA Thunderbird (Mozilla) Fixed in 45.5
  • Fix · CNA Firefox ESR (Mozilla) Fixed in 45.5
  • Fix · CNA Firefox (Mozilla) Fixed in 50

Red Hat 1 advisory

  • RHSA-2016:2780 Released 2016-11-16 · Red Hat rating Critical
    firefox security update
    • Red Hat Enterprise Linux (v. 5 server) firefox-45.5.0-1.el5_11, firefox-45.5.0-1.el5_11.i386
    • Red Hat Enterprise Linux Client (v. 7) firefox-45.5.0-1.el7_3
    • Red Hat Enterprise Linux Client Optional (v. 7) firefox-45.5.0-1.el7_3
    • Red Hat Enterprise Linux Desktop (v. 5 client) firefox-45.5.0-1.el5_11, firefox-45.5.0-1.el5_11.i386
    • Red Hat Enterprise Linux Desktop (v. 6) firefox-45.5.0-1.el6_8
    • Red Hat Enterprise Linux Desktop Optional (v. 6) firefox-45.5.0-1.el6_8
    • Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox-45.5.0-1.el6_8
    • Red Hat Enterprise Linux Server (v. 6) firefox-45.5.0-1.el6_8
    • Red Hat Enterprise Linux Server (v. 7) firefox-45.5.0-1.el7_3
    • Red Hat Enterprise Linux Server Optional (v. 6) firefox-45.5.0-1.el6_8, firefox-45.5.0-1.el6_8.ppc
    • Red Hat Enterprise Linux Server Optional (v. 7) firefox-45.5.0-1.el7_3, firefox-45.5.0-1.el7_3.ppc
    • Red Hat Enterprise Linux Workstation (v. 6) firefox-45.5.0-1.el6_8
    • Red Hat Enterprise Linux Workstation (v. 7) firefox-45.5.0-1.el7_3
    • Red Hat Enterprise Linux Workstation Optional (v. 6) firefox-45.5.0-1.el6_8
    • Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-45.5.0-1.el7_3

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Mozilla Firefox, Firefox ESR, Thunderbird — DSA-3730

    7 records Highest priority Priority CRITICAL 1 CRITICAL, 3 MEDIUM, 3 LOW

    Other records, highest priority first

    • TI-2016-07433 Use after free in Mozilla FirefoxPriority CRITICAL 90
    • TI-2016-04593 Integer overflow in Mozilla ThunderbirdPriority MEDIUM 48
    • TI-2016-04586 Memory corruption in Mozilla ThunderbirdPriority MEDIUM 48
    Show all 7 records → Advisory →
  • Advisory ·

    Mozilla Firefox, Firefox ESR, Thunderbird — RHSA-2016:2780

    6 records Highest priority Priority MEDIUM 3 MEDIUM, 3 LOW

    Other records, highest priority first

    • TI-2016-04593 Integer overflow in Mozilla ThunderbirdPriority MEDIUM 48
    • TI-2016-04586 Memory corruption in Mozilla ThunderbirdPriority MEDIUM 48
    • TI-2016-07420 Memory corruption in Mozilla ThunderbirdPriority MEDIUM 47
    Show all 6 records → Advisory →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux (v. 5 server)Fixed RHSA-2016:2780
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2016:2780
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2016:2780
Red Hat Enterprise Linux Desktop (v. 5 client)Fixed RHSA-2016:2780
Red Hat Enterprise Linux Desktop (v. 6)Fixed RHSA-2016:2780
Red Hat Enterprise Linux Desktop Optional (v. 6)Fixed RHSA-2016:2780
Red Hat Enterprise Linux HPC Node Optional (v. 6)Fixed RHSA-2016:2780
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2016:2780
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2016:2780
Red Hat Enterprise Linux Server Optional (v. 6)Fixed RHSA-2016:2780
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2016:2780
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2016:2780
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2016:2780
Red Hat Enterprise Linux Workstation Optional (v. 6)Fixed RHSA-2016:2780
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2016:2780
Not affected: 3 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2016-5291
  2. 2026-10-03 Alias added: GHSA-5rpq-63gx-j9m8

References

Exploit 1

Advisory 6

  • 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 3444 →

Sources

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