CVE-2022-26485

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Summary

CVECVE-2022-26485
StatePUBLISHED
Assignermozilla
Source PriorityCVE Program / NVD first with legacy fallback
Published2022-12-22 20:15:22 UTC
Updated2026-08-19 15:29:21 UTC
DescriptionRemoving 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. This vulnerability affects Firefox < 97.0.2, Firefox ESR < 91.6.1, Firefox for Android < 97.3.0, Thunderbird < 91.6.2, and Focus < 97.3.0.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS: 0.137970000 probability, percentile 0.962230000 (date 2026-08-21)

CISA KEV: Listed on 2022-03-07; due 2022-03-21; ransomware use Unknown

Problem Types: CWE-416 | Use-after-free in XSLT parameter processing | CWE-416 CWE-416 Use After Free

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary8.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
3.1ADPDECLARED8.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary8.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CISA Known Exploited Vulnerability

VendorMozilla
ProductFirefox
NameMozilla Firefox Use-After-Free Vulnerability
Required ActionApply updates per vendor instructions.
Noteshttps://nvd.nist.gov/vuln/detail/CVE-2022-26485

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Mozilla Firefox All All All All
Application Mozilla Firefox All All All All
Application Mozilla Firefox Focus All All All All
Application Mozilla Firefox Mobile All All All All
Application Mozilla Thunderbird All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Mozilla Firefox affected unspecified 97.0.2 custom Not specified
CNA Mozilla Firefox ESR affected unspecified 91.6.1 custom Not specified
CNA Mozilla Firefox For Android affected unspecified 97.3.0 custom Not specified
CNA Mozilla Thunderbird affected unspecified 91.6.2 custom Not specified
CNA Mozilla Focus affected unspecified 97.3.0 custom Not specified

References

ReferenceSourceLinkTags
1758062 - (CVE-2022-26485) heap-use-after-free txMozillaXSLTProcessor.cpp:1361 in txVariable::Convert [exploited in the wild] af854a3a-2127-422b-91ae-364da2661108 bugzilla.mozilla.org Exploit, Issue Tracking, Vendor Advisory
www.cisa.gov/known-exploited-vulnerabilities-catalog 134c704f-9b21-4f2e-91b3-4a467353bcc0 www.cisa.gov US Government Resource
Security Vulnerabilities fixed in Firefox 97.0.2, Firefox ESR 91.6.1, Firefox for Android 97.3.0, and Focus 97.3.0 — Mozilla af854a3a-2127-422b-91ae-364da2661108 www.mozilla.org Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
CISA Known Exploited Vulnerabilities catalog CISA www.cisa.gov kev

Additional Advisory Data

SourceTimeEvent
ADP2022-03-07T00:00:00.000ZCVE-2022-26485 added to CISA KEV

Legacy QID Mappings

  • 159696 Oracle Enterprise Linux Security Update for firefox (ELSA-2022-0824)
  • 159697 Oracle Enterprise Linux Security Update for firefox (ELSA-2022-0818)
  • 159705 Oracle Enterprise Linux Security Update for thunderbird (ELSA-2022-0845)
  • 159706 Oracle Enterprise Linux Security Update for thunderbird (ELSA-2022-0850)
  • 179101 Debian Security Update for firefox-esr (DSA 5090-1)
  • 179106 Debian Security Update for firefox-esr (DLA 2933-1)
  • 179108 Debian Security Update for firefox-esr (DLA 2933-1)
  • 179113 Debian Security Update for thunderbird (DSA 5094-1)
  • 179120 Debian Security Update for thunderbird (DLA 2939-1)
  • 184408 Debian Security Update for firefox-esrthunderbird (CVE-2022-26485)
  • 198689 Ubuntu Security Notification for Firefox Vulnerabilities (USN-5314-1)
  • 240124 Red Hat Update for firefox (RHSA-2022:0817)
  • 240132 Red Hat Update for firefox (RHSA-2022:0824)
  • 240133 Red Hat Update for firefox (RHSA-2022:0818)
  • 240136 Red Hat Update for firefox (RHSA-2022:0816)
  • 240141 Red Hat Update for thunderbird (RHSA-2022:0853)
  • 240142 Red Hat Update for thunderbird (RHSA-2022:0845)
  • 240143 Red Hat Update for thunderbird (RHSA-2022:0843)
  • 240145 Red Hat Update for thunderbird (RHSA-2022:0850)
  • 240433 Red Hat Update for thunderbird (RHSA-2022:0847)
  • 257161 CentOS Security Update for firefox (CESA-2022:0824)
  • 257164 CentOS Security Update for thunderbird (CESA-2022:0850)
  • 282467 Fedora Security Update for firefox (FEDORA-2022-4f28c7541d)
  • 296057 Oracle Solaris 11.4 Support Repository Update (SRU) 44.113.4 Missing (bulletinapr2022)
  • 353262 Amazon Linux Security Advisory for thunderbird : ALAS2-2022-1779
  • 376447 Mozilla Firefox Multiple Vulnerabilities (MFSA2022-09)
  • 376448 Mozilla Firefox ESR Multiple Vulnerabilities (MFSA2022-09)
  • 502074 Alpine Linux Security Update for firefox-esr
  • 502386 Alpine Linux Security Update for thunderbird
  • 502689 Alpine Linux Security Update for firefox
  • 504817 Alpine Linux Security Update for firefox-esr
  • 504827 Alpine Linux Security Update for firefox
  • 505453 Alpine Linux Security Update for thunderbird
  • 630848 Firefox For Android Use After Free Vulnerability
  • 630849 For ios Vulnerability CVE-2022-26485
  • 710582 Gentoo Linux Mozilla Firefox Multiple Vulnerabilities (GLSA 202208-08)
  • 710585 Gentoo Linux Mozilla Thunderbird Multiple Vulnerabilities (GLSA 202208-14)
  • 751839 SUSE Enterprise Linux Security Update for MozillaFirefox (SUSE-SU-2022:0777-1)
  • 751840 SUSE Enterprise Linux Security Update for MozillaFirefox (SUSE-SU-2022:0783-1)
  • 751843 SUSE Enterprise Linux Security Update for MozillaFirefox (SUSE-SU-2022:0778-1)
  • 751847 OpenSUSE Security Update for MozillaFirefox (openSUSE-SU-2022:0783-1)
  • 751857 OpenSUSE Security Update for MozillaThunderbird (openSUSE-SU-2022:0804-1)
  • 753174 SUSE Enterprise Linux Security Update for MozillaThunderbird (SUSE-SU-2022:0804-1)
  • 753414 SUSE Enterprise Linux Security Update for MozillaFirefox (SUSE-SU-2022:14906-1)
  • 940460 AlmaLinux Security Update for firefox (ALSA-2022:0818)
  • 940465 AlmaLinux Security Update for thunderbird (ALSA-2022:0845)
  • 960832 Rocky Linux Security Update for thunderbird (RLSA-2022:0845)
  • 960834 Rocky Linux Security Update for firefox (RLSA-2022:0818)

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