CVE-2022-26485 (GCVE-0-2022-26485)
Vulnerability from cvelistv5 – Published: 2022-12-22 00:00 – Updated: 2025-10-21 23:15Summary
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)
SSVC
Exploitation: active
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-01-28 21:32 UTC
CWE
- Use-after-free in XSLT parameter processing
- CWE-416 - Use After Free
Assigner
References
3 references
Impacted products
5 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Mozilla | Firefox |
Affected:
unspecified , < 97.0.2
(custom)
|
guessed | |
| Mozilla | Firefox ESR |
Affected:
unspecified , < 91.6.1
(custom)
|
guessed | |
| Mozilla | Firefox for Android |
Affected:
unspecified , < 97.3.0
(custom)
|
guessed | |
| Mozilla | Thunderbird |
Affected:
unspecified , < 91.6.2
(custom)
|
guessed | |
| Mozilla | Focus |
Affected:
unspecified , < 97.3.0
(custom)
|
guessed |
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 5e8295a0-5b05-41bc-9fcc-0289f585190c
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
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 29876b17-357e-4082-81b4-392731eb0ce5
Exploited: Yes
Timestamps
First Seen: 2022-03-07
Asserted: 2022-03-07
Scope
Notes: KEVIntel entry: 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... | Affected: Mozilla / Firefox, Firefox ESR, Firefox for Android, Thunderbird, Focus | CVSS: 8.8 (HIGH) | Used in malware: unknown | Not yet in CISA KEV: False
Evidence
Type: Public Report
Signal: Successful Exploitation
Confidence: 70%
Source: kevintel
Details
| Feed | KEVIntel (kevintel.com) |
|---|---|
| Title | 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... |
| Vendor | Mozilla |
| Product | Firefox, Firefox ESR, Firefox for Android, Thunderbird, Focus |
| Added Date | 2022-03-07T00:00:00.000Z |
| Cvss Score | 8.8 |
| Epss Score | None |
| Cvss Severity | HIGH |
| Epss Percentile | None |
| Used In Malware | unknown |
| Ahead Of Cisa Kev | None |
| Not Yet In Cisa Kev | False |
References
Created: 2026-06-23 14:05 UTC
| Updated: 2026-07-10 06:14 UTC
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},
"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"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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