CVE-2022-26485 (GCVE-0-2022-26485)

Vulnerability from cvelistv5 – Published: 2022-12-22 00:00 – Updated: 2025-10-21 23:15
VLAI CISA KEV
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. 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.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: active Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • Use-after-free in XSLT parameter processing
  • CWE-416 - Use After Free
Assigner
References
Impacted products
Vendor Product Version
Mozilla Firefox Affected: unspecified , < 97.0.2 (custom)
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Mozilla Firefox ESR Affected: unspecified , < 91.6.1 (custom)
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Mozilla Firefox for Android Affected: unspecified , < 97.3.0 (custom)
Create a notification for this product.
Mozilla Thunderbird Affected: unspecified , < 91.6.2 (custom)
Create a notification for this product.
Mozilla Focus Affected: unspecified , < 97.3.0 (custom)
Create a notification for this product.
CISA KEV
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 5e8295a0-5b05-41bc-9fcc-0289f585190c

Vulnerability ID: CVE-2022-26485

Status: Confirmed

Status Updated: 2022-03-07 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2022-03-07
Asserted: 2022-03-07
Scope
Notes: KEV entry: Mozilla Firefox Use-After-Free Vulnerability | Affected: Mozilla / Firefox | 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: 2022-03-21 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://nvd.nist.gov/vuln/detail/CVE-2022-26485
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes CWE-416
Feed CISA Known Exploited Vulnerabilities Catalog
Product Firefox
Due Date 2022-03-21
Date Added 2022-03-07
Vendorproject Mozilla
Vulnerabilityname Mozilla Firefox Use-After-Free Vulnerability
Knownransomwarecampaignuse Unknown
References
Created: 2026-02-02 12:28 UTC | Updated: 2026-02-06 07:17 UTC
Show details on NVD website
To clipboard 

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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.