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TI-2022-09757 Aliases CVE-2022-26386GHSA-8xcq-8jhf-w82h

Previously Firefox for macOS and Linux would download temporary files to a user-specific…

Priority LOW 30CWE-377Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · None
Fix status
Partial Red Hat: 10 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.

Summary

Previously Firefox for macOS and Linux would download temporary files to a user-specific directory in <code>/tmp</code>, but this behavior was changed to download them to <code>/tmp</code> where they could be affected by other local users. This behavior was reverted to the original, user-specific directory. <br>*This bug only affects Firefox for macOS and Linux. Other operating systems are unaffected.*. This vulnerability affects Firefox ESR < 91.7 and Thunderbird < 91.7.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00706 53rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Firefox ESR (Mozilla): 91.7Thunderbird (Mozilla): 91.7Red Hat: 10 advisoriesRed Hat: 10 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

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 ESRbefore 91.791.7Patch availableCNA
MozillaThunderbirdbefore 91.791.7Patch availableCNA
  • Firefox ESR VendorMozilla Affected before 91.7 Fixed in 91.7 Patch available CNA
  • Thunderbird VendorMozilla Affected before 91.7 Fixed in 91.7 Patch available CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*before 91.7VulnerableMozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*before 91.7VulnerableMozilla
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*not specified by NVDRunning onApple
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*not specified by NVDRunning onLinux
  • cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* Versions before 91.7 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 91.7 Vulnerable ·Mozilla
  • cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Apple
  • cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Linux

Remediation

  • Fix · CNA Firefox ESR (Mozilla) Fixed in 91.7
  • Fix · CNA Thunderbird (Mozilla) Fixed in 91.7

Red Hat 10 advisories

  • RHSA-2022:0850 Released 2022-03-14 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux Client (v. 7) thunderbird-91.7.0-2.el7_9
    • Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-91.7.0-2.el7_9
    • Red Hat Enterprise Linux Workstation (v. 7) thunderbird-91.7.0-2.el7_9
  • RHSA-2022:0853 Released 2022-03-14 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.4) thunderbird-91.7.0-2.el8_4
  • RHSA-2022:0845 Released 2022-03-14 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 8) thunderbird-91.7.0-2.el8_5
Show 7 more Red Hat advisories
  • RHSA-2022:0847 Released 2022-03-14 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream E4S (v. 8.1) thunderbird-91.7.0-2.el8_1
  • RHSA-2022:0843 Released 2022-03-14 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v. 8.2) thunderbird-91.7.0-2.el8_2
  • RHSA-2022:0824 Released 2022-03-10 · Red Hat rating Critical
    firefox security and bug fix update
    • Red Hat Enterprise Linux Client (v. 7) firefox-91.7.0-3.el7_9
    • Red Hat Enterprise Linux Client Optional (v. 7) firefox-91.7.0-3.el7_9
    • Red Hat Enterprise Linux Server (v. 7) firefox-91.7.0-3.el7_9
    • Red Hat Enterprise Linux Server Optional (v. 7) firefox-91.7.0-3.el7_9
    • Red Hat Enterprise Linux Workstation (v. 7) firefox-91.7.0-3.el7_9
    • Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-91.7.0-3.el7_9
  • RHSA-2022:0817 Released 2022-03-10 · Red Hat rating Critical
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.4) firefox-91.7.0-3.el8_4
  • RHSA-2022:0818 Released 2022-03-10 · Red Hat rating Critical
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 8) firefox-91.7.0-3.el8_5
  • RHSA-2022:0816 Released 2022-03-10 · Red Hat rating Critical
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v. 8.2) firefox-91.7.0-3.el8_2
  • RHSA-2022:0815 Released 2022-03-10 · Red Hat rating Critical
    firefox security update
    • Red Hat Enterprise Linux AppStream E4S (v. 8.1) firefox-91.7.0-3.el8_1

Fixed in the same release

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

  • Release ·

    Mozilla Firefox ESR, Thunderbird 91.7

    5 records Highest priority Priority HIGH 2 HIGH, 1 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2022-09755 Protection mechanism failure in Mozilla FirefoxPriority HIGH 76
    • TI-2022-09752 Use after free in Mozilla FirefoxPriority HIGH 73
    • TI-2022-09754 When resizing a popup after requesting fullscreen access, the popup would not display the…Priority MEDIUM 53
    Show all 5 records →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2022:0818, RHSA-2022:0845
Red Hat Enterprise Linux AppStream E4S (v. 8.1)Fixed RHSA-2022:0815, RHSA-2022:0847
Red Hat Enterprise Linux AppStream EUS (v. 8.2)Fixed RHSA-2022:0816, RHSA-2022:0843
Red Hat Enterprise Linux AppStream EUS (v.8.4)Fixed RHSA-2022:0817, RHSA-2022:0853
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2022:0824, RHSA-2022:0850
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2022:0824
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2022:0824
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2022:0824, RHSA-2022:0850
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2022:0824, RHSA-2022:0850
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2022:0824
Not affected: 1 product
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-26386
  2. 2026-10-03 Alias added: GHSA-8xcq-8jhf-w82h

References

Exploit 1

Advisory 2

  • TI-2022-15364 Use after free in Mozilla Firefox CVSS 3.1CRITICAL 9.8
  • TI-2022-13633 Out-of-bounds write in Mozilla Thunderbird CVSS 3.1CRITICAL 9.8
  • TI-2021-03015 XML injection in Mozilla Firefox ESR CVSS 3.1CRITICAL 10.0
  • TI-2022-09755 Protection mechanism failure in Mozilla Firefox CVSS 3.1CRITICAL 9.6
  • TI-2022-07009 Protection mechanism failure in Mozilla Firefox CVSS 3.1CRITICAL 9.6
  • TI-2023-18834 Use after free in Mozilla Firefox CVSS 3.1HIGH 8.8
See all 486 →

Sources

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