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Vulnerability details: VCID-y264-f178-xua1
Vulnerability ID VCID-y264-f178-xua1
Aliases CVE-2022-26387
Summary When installing an add-on, Thunderbird verified the signature before prompting the user; but while the user was confirming the prompt, the underlying add-on file could have been modified and Thunderbird would not have noticed.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition
System Score Found at
cvssv3 7.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2022-26387.json
epss 0.00098 https://api.first.org/data/v1/epss?cve=CVE-2022-26387
epss 0.00098 https://api.first.org/data/v1/epss?cve=CVE-2022-26387
epss 0.00098 https://api.first.org/data/v1/epss?cve=CVE-2022-26387
epss 0.00098 https://api.first.org/data/v1/epss?cve=CVE-2022-26387
epss 0.00098 https://api.first.org/data/v1/epss?cve=CVE-2022-26387
epss 0.00098 https://api.first.org/data/v1/epss?cve=CVE-2022-26387
epss 0.00098 https://api.first.org/data/v1/epss?cve=CVE-2022-26387
epss 0.00098 https://api.first.org/data/v1/epss?cve=CVE-2022-26387
epss 0.00098 https://api.first.org/data/v1/epss?cve=CVE-2022-26387
epss 0.00098 https://api.first.org/data/v1/epss?cve=CVE-2022-26387
epss 0.00098 https://api.first.org/data/v1/epss?cve=CVE-2022-26387
epss 0.00098 https://api.first.org/data/v1/epss?cve=CVE-2022-26387
epss 0.00098 https://api.first.org/data/v1/epss?cve=CVE-2022-26387
epss 0.00098 https://api.first.org/data/v1/epss?cve=CVE-2022-26387
epss 0.00098 https://api.first.org/data/v1/epss?cve=CVE-2022-26387
epss 0.00098 https://api.first.org/data/v1/epss?cve=CVE-2022-26387
epss 0.00098 https://api.first.org/data/v1/epss?cve=CVE-2022-26387
cvssv3.1 7.5 https://bugzilla.mozilla.org/show_bug.cgi?id=1752979
ssvc Track https://bugzilla.mozilla.org/show_bug.cgi?id=1752979
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2022-26387
archlinux High https://security.archlinux.org/AVG-2713
archlinux High https://security.archlinux.org/AVG-2714
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2022-10
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2022-11
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2022-12
cvssv3.1 7.5 https://www.mozilla.org/security/advisories/mfsa2022-10/
ssvc Track https://www.mozilla.org/security/advisories/mfsa2022-10/
cvssv3.1 7.5 https://www.mozilla.org/security/advisories/mfsa2022-11/
ssvc Track https://www.mozilla.org/security/advisories/mfsa2022-11/
cvssv3.1 7.5 https://www.mozilla.org/security/advisories/mfsa2022-12/
ssvc Track https://www.mozilla.org/security/advisories/mfsa2022-12/
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2022-26387.json
https://api.first.org/data/v1/epss?cve=CVE-2022-26387
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-26381
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-26383
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-26384
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-26386
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-26387
2062222 https://bugzilla.redhat.com/show_bug.cgi?id=2062222
AVG-2713 https://security.archlinux.org/AVG-2713
AVG-2714 https://security.archlinux.org/AVG-2714
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
CVE-2022-26387 https://nvd.nist.gov/vuln/detail/CVE-2022-26387
mfsa2022-10 https://www.mozilla.org/en-US/security/advisories/mfsa2022-10
mfsa2022-10 https://www.mozilla.org/security/advisories/mfsa2022-10/
mfsa2022-11 https://www.mozilla.org/en-US/security/advisories/mfsa2022-11
mfsa2022-11 https://www.mozilla.org/security/advisories/mfsa2022-11/
mfsa2022-12 https://www.mozilla.org/en-US/security/advisories/mfsa2022-12
mfsa2022-12 https://www.mozilla.org/security/advisories/mfsa2022-12/
RHSA-2022:0815 https://access.redhat.com/errata/RHSA-2022:0815
RHSA-2022:0816 https://access.redhat.com/errata/RHSA-2022:0816
RHSA-2022:0817 https://access.redhat.com/errata/RHSA-2022:0817
RHSA-2022:0818 https://access.redhat.com/errata/RHSA-2022:0818
RHSA-2022:0824 https://access.redhat.com/errata/RHSA-2022:0824
RHSA-2022:0843 https://access.redhat.com/errata/RHSA-2022:0843
RHSA-2022:0845 https://access.redhat.com/errata/RHSA-2022:0845
RHSA-2022:0847 https://access.redhat.com/errata/RHSA-2022:0847
RHSA-2022:0850 https://access.redhat.com/errata/RHSA-2022:0850
RHSA-2022:0853 https://access.redhat.com/errata/RHSA-2022:0853
show_bug.cgi?id=1752979 https://bugzilla.mozilla.org/show_bug.cgi?id=1752979
USN-5321-1 https://usn.ubuntu.com/5321-1/
USN-5321-2 https://usn.ubuntu.com/5321-2/
USN-5345-1 https://usn.ubuntu.com/5345-1/
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2022-26387.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://bugzilla.mozilla.org/show_bug.cgi?id=1752979
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2025-04-15T20:10:36Z/ Found at https://bugzilla.mozilla.org/show_bug.cgi?id=1752979
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2022-26387
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://www.mozilla.org/security/advisories/mfsa2022-10/
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2025-04-15T20:10:36Z/ Found at https://www.mozilla.org/security/advisories/mfsa2022-10/
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://www.mozilla.org/security/advisories/mfsa2022-11/
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2025-04-15T20:10:36Z/ Found at https://www.mozilla.org/security/advisories/mfsa2022-11/
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://www.mozilla.org/security/advisories/mfsa2022-12/
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2025-04-15T20:10:36Z/ Found at https://www.mozilla.org/security/advisories/mfsa2022-12/
Exploit Prediction Scoring System (EPSS)
Percentile 0.28058
EPSS Score 0.00098
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:10:03.030856+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2022/mfsa2022-12.yml 37.0.0