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
CWE
  • Use-after-free in XSLT parameter processing
Assigner
References
Impacted products
Vendor Product Version
Mozilla Firefox Affected: unspecified , < 97.0.2 (custom)
Create a notification for this product.
Mozilla Firefox ESR Affected: unspecified , < 91.6.1 (custom)
Create a notification for this product.
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: fdedadc9-f50f-4bab-9aa7-b03bf2589fc7

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 13:25 UTC | Updated: 2026-02-06 07:53 UTC
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T05:03:32.985Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://www.mozilla.org/security/advisories/mfsa2022-09/"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1758062"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 8.8,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "REQUIRED",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2022-26485",
                "options": [
                  {
                    "Exploitation": "active"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-01-28T21:32:55.676135Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          },
          {
            "other": {
              "content": {
                "dateAdded": "2022-03-07",
                "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-26485"
              },
              "type": "kev"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-416",
                "description": "CWE-416 Use After Free",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-10-21T23:15:29.432Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "government-resource"
            ],
            "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-26485"
          }
        ],
        "timeline": [
          {
            "lang": "en",
            "time": "2022-03-07T00:00:00.000Z",
            "value": "CVE-2022-26485 added to CISA KEV"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Firefox",
          "vendor": "Mozilla",
          "versions": [
            {
              "lessThan": "97.0.2",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Firefox ESR",
          "vendor": "Mozilla",
          "versions": [
            {
              "lessThan": "91.6.1",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Firefox for Android",
          "vendor": "Mozilla",
          "versions": [
            {
              "lessThan": "97.3.0",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Thunderbird",
          "vendor": "Mozilla",
          "versions": [
            {
              "lessThan": "91.6.2",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Focus",
          "vendor": "Mozilla",
          "versions": [
            {
              "lessThan": "97.3.0",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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 \u003c 97.0.2, Firefox ESR \u003c 91.6.1, Firefox for Android \u003c 97.3.0, Thunderbird \u003c 91.6.2, and Focus \u003c 97.3.0."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Use-after-free in XSLT parameter processing",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-12-22T00:00:00.000Z",
        "orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
        "shortName": "mozilla"
      },
      "references": [
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2022-09/"
        },
        {
          "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1758062"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
    "assignerShortName": "mozilla",
    "cveId": "CVE-2022-26485",
    "datePublished": "2022-12-22T00:00:00.000Z",
    "dateReserved": "2022-03-04T00:00:00.000Z",
    "dateUpdated": "2025-10-21T23:15:29.432Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "cisa_known_exploited": {
      "cveID": "CVE-2022-26485",
      "cwes": "[\"CWE-416\"]",
      "dateAdded": "2022-03-07",
      "dueDate": "2022-03-21",
      "knownRansomwareCampaignUse": "Unknown",
      "notes": "https://nvd.nist.gov/vuln/detail/CVE-2022-26485",
      "product": "Firefox",
      "requiredAction": "Apply updates per vendor instructions.",
      "shortDescription": "Mozilla Firefox contains a use-after-free vulnerability in XSLT parameter processing which can be exploited to perform arbitrary code execution.",
      "vendorProject": "Mozilla",
      "vulnerabilityName": "Mozilla Firefox Use-After-Free Vulnerability"
    },
    "epss": {
      "cve": "CVE-2022-26485",
      "date": "2026-05-30",
      "epss": "0.02853",
      "percentile": "0.86487"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-26485\",\"sourceIdentifier\":\"security@mozilla.org\",\"published\":\"2022-12-22T20:15:22.563\",\"lastModified\":\"2025-11-04T14:35:17.667\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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 \u003c 97.0.2, Firefox ESR \u003c 91.6.1, Firefox for Android \u003c 97.3.0, Thunderbird \u003c 91.6.2, and Focus \u003c 97.3.0.\"},{\"lang\":\"es\",\"value\":\"La eliminaci\u00f3n de un par\u00e1metro XSLT durante el procesamiento podr\u00eda haber dado lugar a un use-after-free explotable. Hemos recibido informes de ataques en la naturaleza que abusan de esta falla. Esta vulnerabilidad afecta a Firefox \u0026lt; 97.0.2, Firefox ESR \u0026lt; 91.6.1, Firefox para Android \u0026lt; 97.3.0, Thunderbird \u0026lt; 91.6.2 y Focus \u0026lt; 97.3.0.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H\",\"baseScore\":8.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":5.9},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H\",\"baseScore\":8.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":5.9}]},\"cisaExploitAdd\":\"2022-03-07\",\"cisaActionDue\":\"2022-03-21\",\"cisaRequiredAction\":\"Apply updates per vendor instructions.\",\"cisaVulnerabilityName\":\"Mozilla Firefox Use-After-Free Vulnerability\",\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*\",\"versionEndExcluding\":\"91.6.1\",\"matchCriteriaId\":\"43351EFE-E64C-4ACD-A779-CBADE52E35B3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*\",\"versionEndExcluding\":\"97.0.2\",\"matchCriteriaId\":\"E34F39EA-3536-47AE-948A-A1BE4FEBAA52\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:mozilla:firefox:*:*:*:*:*:android:*:*\",\"versionEndExcluding\":\"97.3.0\",\"matchCriteriaId\":\"CDD84821-8FA2-483B-995B-5C1F571D4247\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:mozilla:firefox_focus:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"97.3.0\",\"matchCriteriaId\":\"3F1EC4DF-B869-4BEB-BB9D-C629F82A9941\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"91.6.2\",\"matchCriteriaId\":\"FA3A4431-52FE-4BEE-A847-B500211A79AD\"}]}]}],\"references\":[{\"url\":\"https://bugzilla.mozilla.org/show_bug.cgi?id=1758062\",\"source\":\"security@mozilla.org\",\"tags\":[\"Exploit\",\"Issue Tracking\",\"Vendor Advisory\"]},{\"url\":\"https://www.mozilla.org/security/advisories/mfsa2022-09/\",\"source\":\"security@mozilla.org\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://bugzilla.mozilla.org/show_bug.cgi?id=1758062\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\",\"Issue Tracking\",\"Vendor Advisory\"]},{\"url\":\"https://www.mozilla.org/security/advisories/mfsa2022-09/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-26485\",\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"tags\":[\"US Government Resource\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://www.mozilla.org/security/advisories/mfsa2022-09/\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://bugzilla.mozilla.org/show_bug.cgi?id=1758062\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-03T05:03:32.985Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 8.8, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"REQUIRED\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2022-26485\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"active\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-01-28T21:32:55.676135Z\"}}}, {\"other\": {\"type\": \"kev\", \"content\": {\"dateAdded\": \"2022-03-07\", \"reference\": \"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-26485\"}}}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2022-03-07T00:00:00.000Z\", \"value\": \"CVE-2022-26485 added to CISA KEV\"}], \"references\": [{\"url\": \"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-26485\", \"tags\": [\"government-resource\"]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-416\", \"description\": \"CWE-416 Use After Free\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-01-28T21:32:28.142Z\"}}], \"cna\": {\"affected\": [{\"vendor\": \"Mozilla\", \"product\": \"Firefox\", \"versions\": [{\"status\": \"affected\", \"version\": \"unspecified\", \"lessThan\": \"97.0.2\", \"versionType\": \"custom\"}]}, {\"vendor\": \"Mozilla\", \"product\": \"Firefox ESR\", \"versions\": [{\"status\": \"affected\", \"version\": \"unspecified\", \"lessThan\": \"91.6.1\", \"versionType\": \"custom\"}]}, {\"vendor\": \"Mozilla\", \"product\": \"Firefox for Android\", \"versions\": [{\"status\": \"affected\", \"version\": \"unspecified\", \"lessThan\": \"97.3.0\", \"versionType\": \"custom\"}]}, {\"vendor\": \"Mozilla\", \"product\": \"Thunderbird\", \"versions\": [{\"status\": \"affected\", \"version\": \"unspecified\", \"lessThan\": \"91.6.2\", \"versionType\": \"custom\"}]}, {\"vendor\": \"Mozilla\", \"product\": \"Focus\", \"versions\": [{\"status\": \"affected\", \"version\": \"unspecified\", \"lessThan\": \"97.3.0\", \"versionType\": \"custom\"}]}], \"references\": [{\"url\": \"https://www.mozilla.org/security/advisories/mfsa2022-09/\"}, {\"url\": \"https://bugzilla.mozilla.org/show_bug.cgi?id=1758062\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"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 \u003c 97.0.2, Firefox ESR \u003c 91.6.1, Firefox for Android \u003c 97.3.0, Thunderbird \u003c 91.6.2, and Focus \u003c 97.3.0.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"text\", \"description\": \"Use-after-free in XSLT parameter processing\"}]}], \"providerMetadata\": {\"orgId\": \"f16b083a-5664-49f3-a51e-8d479e5ed7fe\", \"shortName\": \"mozilla\", \"dateUpdated\": \"2022-12-22T00:00:00.000Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2022-26485\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-10-21T23:15:29.432Z\", \"dateReserved\": \"2022-03-04T00:00:00.000Z\", \"assignerOrgId\": \"f16b083a-5664-49f3-a51e-8d479e5ed7fe\", \"datePublished\": \"2022-12-22T00:00:00.000Z\", \"assignerShortName\": \"mozilla\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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

Author Source Type Date Other

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.