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Vulnerability details: VCID-775j-b8uf-b7eg
Vulnerability ID VCID-775j-b8uf-b7eg
Aliases CVE-2022-26485
Summary Removing an XSLT parameter during processing could have lead to an exploitable use-after-free. We have had reports of attacks in the wild abusing this flaw.
Status Published
Exploitability 2.0
Weighted Severity 8.0
Risk 10.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-416 Use After Free
System Score Found at
cvssv3 8.8 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2022-26485.json
epss 0.03701 https://api.first.org/data/v1/epss?cve=CVE-2022-26485
epss 0.03701 https://api.first.org/data/v1/epss?cve=CVE-2022-26485
epss 0.03701 https://api.first.org/data/v1/epss?cve=CVE-2022-26485
epss 0.03701 https://api.first.org/data/v1/epss?cve=CVE-2022-26485
epss 0.03701 https://api.first.org/data/v1/epss?cve=CVE-2022-26485
epss 0.03701 https://api.first.org/data/v1/epss?cve=CVE-2022-26485
epss 0.03701 https://api.first.org/data/v1/epss?cve=CVE-2022-26485
epss 0.03701 https://api.first.org/data/v1/epss?cve=CVE-2022-26485
epss 0.03701 https://api.first.org/data/v1/epss?cve=CVE-2022-26485
epss 0.03701 https://api.first.org/data/v1/epss?cve=CVE-2022-26485
epss 0.03701 https://api.first.org/data/v1/epss?cve=CVE-2022-26485
epss 0.03701 https://api.first.org/data/v1/epss?cve=CVE-2022-26485
epss 0.03701 https://api.first.org/data/v1/epss?cve=CVE-2022-26485
epss 0.0371 https://api.first.org/data/v1/epss?cve=CVE-2022-26485
epss 0.0371 https://api.first.org/data/v1/epss?cve=CVE-2022-26485
epss 0.04017 https://api.first.org/data/v1/epss?cve=CVE-2022-26485
cvssv3.1 8.8 https://bugzilla.mozilla.org/show_bug.cgi?id=1758062
ssvc Attend https://bugzilla.mozilla.org/show_bug.cgi?id=1758062
cvssv3.1 8.8 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1 8.8 https://nvd.nist.gov/vuln/detail/CVE-2022-26485
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2022-09
cvssv3.1 8.8 https://www.mozilla.org/security/advisories/mfsa2022-09/
ssvc Attend https://www.mozilla.org/security/advisories/mfsa2022-09/
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2022-26485.json
https://api.first.org/data/v1/epss?cve=CVE-2022-26485
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-26485
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-26486
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
2061736 https://bugzilla.redhat.com/show_bug.cgi?id=2061736
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:*:*:*:*:*:android:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox:*:*:*:*:*:android:*:*
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:firefox_focus:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox_focus:*:*:*:*:*:*:*:*
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-2022-26485 https://nvd.nist.gov/vuln/detail/CVE-2022-26485
mfsa2022-09 https://www.mozilla.org/en-US/security/advisories/mfsa2022-09
mfsa2022-09 https://www.mozilla.org/security/advisories/mfsa2022-09/
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=1758062 https://bugzilla.mozilla.org/show_bug.cgi?id=1758062
USN-5314-1 https://usn.ubuntu.com/5314-1/
Data source KEV
Date added March 7, 2022
Description Mozilla Firefox contains a use-after-free vulnerability in XSLT parameter processing which can be exploited to perform arbitrary code execution.
Required action Apply updates per vendor instructions.
Due date March 21, 2022
Note 
https://nvd.nist.gov/vuln/detail/CVE-2022-26485
Ransomware campaign use Unknown
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2022-26485.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:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://bugzilla.mozilla.org/show_bug.cgi?id=1758062
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:A/A:N/T:T/P:M/B:A/M:M/D:A/2025-01-28T21:32:55Z/ Found at https://bugzilla.mozilla.org/show_bug.cgi?id=1758062
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
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:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2022-26485
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:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://www.mozilla.org/security/advisories/mfsa2022-09/
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:A/A:N/T:T/P:M/B:A/M:M/D:A/2025-01-28T21:32:55Z/ Found at https://www.mozilla.org/security/advisories/mfsa2022-09/
Exploit Prediction Scoring System (EPSS)
Percentile 0.87497
EPSS Score 0.03701
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:10:06.223712+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2022/mfsa2022-09.yml 37.0.0