CVE-2026-20643 (GCVE-0-2026-20643)
Vulnerability from cvelistv5 – Published: 2026-03-17 22:29 – Updated: 2026-08-17 21:30
VLAI
EPSS
VEX
Summary
A cross-origin issue in the Navigation API was addressed with improved input validation. This issue is fixed in Background Security Improvements for iOS, iPadOS, and macOS, Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, visionOS 26.4. Processing maliciously crafted web content may bypass Same Origin Policy.
Severity
5.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-18 13:14 UTC
CWE
Assigner
References
7 references
Impacted products
4 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Apple | Safari |
Affected:
0 , < 26.4
(custom)
|
guessed | |
| Apple | iOS and iPadOS |
Affected:
0 , < 18.7.7
(custom)
Affected: 0 , < 26.3.1 (a) (custom) Affected: 0 , < 26.4 (custom) |
guessed | |
| Apple | macOS |
Affected:
0 , < 26.3.1 (a)
(custom)
Affected: 0 , < 26.3.2 (a) (custom) Affected: 0 , < 26.4 (custom) |
guessed | |
| Apple | visionOS |
Affected:
0 , < 26.4
(custom)
|
guessed |
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.4,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-20643",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-03-18T13:14:53.546083Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-20",
"description": "CWE-20 Improper Input Validation",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-346",
"description": "CWE-346 Origin Validation Error",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-03-18T13:14:56.139Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
},
{
"providerMetadata": {
"dateUpdated": "2026-03-19T16:18:46.731Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "http://seclists.org/fulldisclosure/2026/Mar/10"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "Safari",
"vendor": "Apple",
"versions": [
{
"lessThan": "26.4",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"product": "iOS and iPadOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "18.7.7",
"status": "affected",
"version": "0",
"versionType": "custom"
},
{
"lessThan": "26.3.1 (a)",
"status": "affected",
"version": "0",
"versionType": "custom"
},
{
"lessThan": "26.4",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"product": "macOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "26.3.1 (a)",
"status": "affected",
"version": "0",
"versionType": "custom"
},
{
"lessThan": "26.3.2 (a)",
"status": "affected",
"version": "0",
"versionType": "custom"
},
{
"lessThan": "26.4",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"product": "visionOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "26.4",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A cross-origin issue in the Navigation API was addressed with improved input validation. This issue is fixed in Background Security Improvements for iOS, iPadOS, and macOS, Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, visionOS 26.4. Processing maliciously crafted web content may bypass Same Origin Policy."
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "Processing maliciously crafted web content may bypass Same Origin Policy",
"lang": "en"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T21:30:53.812Z",
"orgId": "286789f9-fbc2-4510-9f9a-43facdede74c",
"shortName": "apple"
},
"references": [
{
"url": "https://support.apple.com/en-us/126604"
},
{
"url": "https://support.apple.com/en-us/126792"
},
{
"url": "https://support.apple.com/en-us/126793"
},
{
"url": "https://support.apple.com/en-us/126794"
},
{
"url": "https://support.apple.com/en-us/126799"
},
{
"url": "https://support.apple.com/en-us/126800"
}
]
}
},
"cveMetadata": {
"assignerOrgId": "286789f9-fbc2-4510-9f9a-43facdede74c",
"assignerShortName": "apple",
"cveId": "CVE-2026-20643",
"datePublished": "2026-03-17T22:29:48.227Z",
"dateReserved": "2025-11-11T14:43:07.862Z",
"dateUpdated": "2026-08-17T21:30:53.812Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-20643",
"date": "2026-09-21",
"epss": "0.00354",
"percentile": "0.29059"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"product": "Safari",
"vendor": "Apple",
"versions": [
{
"lessThan": "26.4",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"product": "iOS and iPadOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "18.7.7",
"status": "affected",
"version": "0",
"versionType": "custom"
},
{
"lessThan": "26.3.1 (a)",
"status": "affected",
"version": "0",
"versionType": "custom"
},
{
"lessThan": "26.4",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"product": "macOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "26.3.1 (a)",
"status": "affected",
"version": "0",
"versionType": "custom"
},
{
"lessThan": "26.3.2 (a)",
"status": "affected",
"version": "0",
"versionType": "custom"
},
{
"lessThan": "26.4",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"product": "visionOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "26.4",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
}
],
"source": "product-security@apple.com"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*",
"matchCriteriaId": "A9117B15-6B46-4C64-BC4A-DDF9D9FBBEB5",
"versionEndExcluding": "26.3.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*",
"matchCriteriaId": "60C61D06-6323-4C2E-96BC-F05F0C459568",
"versionEndExcluding": "26.3.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*",
"matchCriteriaId": "68370079-081F-40B1-A93F-F2B042B813E4",
"versionEndExcluding": "26.3.1",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A cross-origin issue in the Navigation API was addressed with improved input validation. This issue is fixed in Background Security Improvements for iOS, iPadOS, and macOS, Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, visionOS 26.4. Processing maliciously crafted web content may bypass Same Origin Policy."
},
{
"lang": "es",
"value": "Se abord\u00f3 un problema de origen cruzado en la API de Navegaci\u00f3n con una validaci\u00f3n de entrada mejorada. Este problema se solucion\u00f3 en las Mejoras de Seguridad en Segundo Plano para iOS 26.3.1, iPadOS 26.3.1, macOS 26.3.1 y macOS 26.3.2. El procesamiento de contenido web creado con fines maliciosos podr\u00eda eludir la Pol\u00edtica del Mismo Origen."
}
],
"id": "CVE-2026-20643",
"lastModified": "2026-06-17T10:17:35.967",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.4,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 2.5,
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-20643",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-03-18T13:14:53.546083Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-03-17T23:16:17.193",
"references": [
{
"source": "product-security@apple.com",
"tags": [
"Release Notes",
"Vendor Advisory"
],
"url": "https://support.apple.com/en-us/126604"
},
{
"source": "product-security@apple.com",
"url": "https://support.apple.com/en-us/126792"
},
{
"source": "product-security@apple.com",
"url": "https://support.apple.com/en-us/126793"
},
{
"source": "product-security@apple.com",
"url": "https://support.apple.com/en-us/126794"
},
{
"source": "product-security@apple.com",
"url": "https://support.apple.com/en-us/126799"
},
{
"source": "product-security@apple.com",
"url": "https://support.apple.com/en-us/126800"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://seclists.org/fulldisclosure/2026/Mar/10"
}
],
"sourceIdentifier": "product-security@apple.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-20"
},
{
"lang": "en",
"value": "CWE-346"
}
],
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-06-28T11:28:12+00:00",
"cve": "CVE-2026-20643",
"id": "CVE-2026-20643",
"initial_release_date": "2026-03-28T20:00:00+00:00",
"product_status:fixed": "509",
"product_status:known_affected": "4",
"product_status:known_not_affected": "5",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "webkitgtk: Processing maliciously crafted web content may bypass Same Origin Policy",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-20643.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-08-18T17:03:55Z",
"cve": "CVE-2026-20643",
"id": "CVE-2026-20643",
"initial_release_date": "2026-03-31T23:28:37Z",
"product_status:known_affected": "122",
"product_status:recommended": "336",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-20643",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-20643.json",
"version": "12"
},
"vulnrichment": {
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2026-03-19T16:18:46.731Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "http://seclists.org/fulldisclosure/2026/Mar/10"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.4,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-20643",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-03-18T13:14:53.546083Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-20",
"description": "CWE-20 Improper Input Validation",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-346",
"description": "CWE-346 Origin Validation Error",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-03-18T13:14:49.567Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Safari",
"vendor": "Apple",
"versions": [
{
"lessThan": "26.4",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"product": "iOS and iPadOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "18.7.7",
"status": "affected",
"version": "0",
"versionType": "custom"
},
{
"lessThan": "26.3.1 (a)",
"status": "affected",
"version": "0",
"versionType": "custom"
},
{
"lessThan": "26.4",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"product": "macOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "26.3.1 (a)",
"status": "affected",
"version": "0",
"versionType": "custom"
},
{
"lessThan": "26.3.2 (a)",
"status": "affected",
"version": "0",
"versionType": "custom"
},
{
"lessThan": "26.4",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"product": "visionOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "26.4",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A cross-origin issue in the Navigation API was addressed with improved input validation. This issue is fixed in Background Security Improvements for iOS, iPadOS, and macOS, Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, visionOS 26.4. Processing maliciously crafted web content may bypass Same Origin Policy."
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "Processing maliciously crafted web content may bypass Same Origin Policy",
"lang": "en"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T21:30:53.812Z",
"orgId": "286789f9-fbc2-4510-9f9a-43facdede74c",
"shortName": "apple"
},
"references": [
{
"url": "https://support.apple.com/en-us/126604"
},
{
"url": "https://support.apple.com/en-us/126792"
},
{
"url": "https://support.apple.com/en-us/126793"
},
{
"url": "https://support.apple.com/en-us/126794"
},
{
"url": "https://support.apple.com/en-us/126799"
},
{
"url": "https://support.apple.com/en-us/126800"
}
]
}
},
"cveMetadata": {
"assignerOrgId": "286789f9-fbc2-4510-9f9a-43facdede74c",
"assignerShortName": "apple",
"cveId": "CVE-2026-20643",
"datePublished": "2026-03-17T22:29:48.227Z",
"dateReserved": "2025-11-11T14:43:07.862Z",
"dateUpdated": "2026-08-17T21:30:53.812Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
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.
Loading…
Loading…
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.
Loading…
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.
Loading…