CVE-2016-9063 (GCVE-0-2016-9063)
Vulnerability from cvelistv5 – Published: 2018-06-11 21:00 – Updated: 2026-10-08 21:03
VLAI
EPSS
VEX
Summary
An integer overflow during the parsing of XML using the Expat library. This vulnerability affects Firefox < 50.
Severity
No CVSS data available.
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-08 20:58 UTC
CWE
- Possible integer overflow to fix inside XML_Parse in Expat
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://www.debian.org/security/2017/dsa-3898 | vendor-advisoryx_refsource_DEBIAN |
| http://www.securityfocus.com/bid/94337 | vdb-entryx_refsource_BID |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1274777 | x_refsource_CONFIRM |
| http://www.securitytracker.com/id/1037298 | vdb-entryx_refsource_SECTRACK |
| http://www.securitytracker.com/id/1039427 | vdb-entryx_refsource_SECTRACK |
| https://www.mozilla.org/security/advisories/mfsa2… | x_refsource_CONFIRM |
Impacted products
Date Public
2016-11-15 00:00
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-06T02:42:10.630Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"name": "DSA-3898",
"tags": [
"vendor-advisory",
"x_refsource_DEBIAN",
"x_transferred"
],
"url": "https://www.debian.org/security/2017/dsa-3898"
},
{
"name": "94337",
"tags": [
"vdb-entry",
"x_refsource_BID",
"x_transferred"
],
"url": "http://www.securityfocus.com/bid/94337"
},
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1274777"
},
{
"name": "1037298",
"tags": [
"vdb-entry",
"x_refsource_SECTRACK",
"x_transferred"
],
"url": "http://www.securitytracker.com/id/1037298"
},
{
"name": "1039427",
"tags": [
"vdb-entry",
"x_refsource_SECTRACK",
"x_transferred"
],
"url": "http://www.securitytracker.com/id/1039427"
},
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://www.mozilla.org/security/advisories/mfsa2016-89/"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2016-9063",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-08T20:58:11.571362Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-10-08T21:03:21.752Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Firefox",
"vendor": "Mozilla",
"versions": [
{
"lessThan": "50",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
}
],
"datePublic": "2016-11-15T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "An integer overflow during the parsing of XML using the Expat library. This vulnerability affects Firefox \u003c 50."
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "Possible integer overflow to fix inside XML_Parse in Expat",
"lang": "en",
"type": "text"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2018-06-12T09:57:01.000Z",
"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
"shortName": "mozilla"
},
"references": [
{
"name": "DSA-3898",
"tags": [
"vendor-advisory",
"x_refsource_DEBIAN"
],
"url": "https://www.debian.org/security/2017/dsa-3898"
},
{
"name": "94337",
"tags": [
"vdb-entry",
"x_refsource_BID"
],
"url": "http://www.securityfocus.com/bid/94337"
},
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1274777"
},
{
"name": "1037298",
"tags": [
"vdb-entry",
"x_refsource_SECTRACK"
],
"url": "http://www.securitytracker.com/id/1037298"
},
{
"name": "1039427",
"tags": [
"vdb-entry",
"x_refsource_SECTRACK"
],
"url": "http://www.securitytracker.com/id/1039427"
},
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://www.mozilla.org/security/advisories/mfsa2016-89/"
}
],
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "security@mozilla.org",
"ID": "CVE-2016-9063",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "Firefox",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_value": "50"
}
]
}
}
]
},
"vendor_name": "Mozilla"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "An integer overflow during the parsing of XML using the Expat library. This vulnerability affects Firefox \u003c 50."
}
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "Possible integer overflow to fix inside XML_Parse in Expat"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "DSA-3898",
"refsource": "DEBIAN",
"url": "https://www.debian.org/security/2017/dsa-3898"
},
{
"name": "94337",
"refsource": "BID",
"url": "http://www.securityfocus.com/bid/94337"
},
{
"name": "https://bugzilla.mozilla.org/show_bug.cgi?id=1274777",
"refsource": "CONFIRM",
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1274777"
},
{
"name": "1037298",
"refsource": "SECTRACK",
"url": "http://www.securitytracker.com/id/1037298"
},
{
"name": "1039427",
"refsource": "SECTRACK",
"url": "http://www.securitytracker.com/id/1039427"
},
{
"name": "https://www.mozilla.org/security/advisories/mfsa2016-89/",
"refsource": "CONFIRM",
"url": "https://www.mozilla.org/security/advisories/mfsa2016-89/"
}
]
}
}
}
},
"cveMetadata": {
"assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
"assignerShortName": "mozilla",
"cveId": "CVE-2016-9063",
"datePublished": "2018-06-11T21:00:00.000Z",
"dateReserved": "2016-10-27T00:00:00.000Z",
"dateUpdated": "2026-10-08T21:03:21.752Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2016-9063",
"date": "2026-10-09",
"epss": "0.05472",
"percentile": "0.92559"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"product": "Firefox",
"vendor": "Mozilla",
"versions": [
{
"lessThan": "50",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
}
],
"source": "security@mozilla.org"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*",
"matchCriteriaId": "9E8795EE-B511-4088-95B5-07616868B932",
"versionEndExcluding": "50",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
"matchCriteriaId": "C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
"matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
"matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*",
"matchCriteriaId": "CF6ABED2-9492-42E0-80A7-AB77C2900E9A",
"versionEndExcluding": "2.7.15",
"versionStartIncluding": "2.7.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*",
"matchCriteriaId": "2E822AE7-709A-4DA4-B2C6-7A5968AE62FD",
"versionEndExcluding": "3.3.7",
"versionStartIncluding": "3.3.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*",
"matchCriteriaId": "E65C03FE-52E0-477A-A104-8F2CC0EEE753",
"versionEndExcluding": "3.4.7",
"versionStartIncluding": "3.4.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*",
"matchCriteriaId": "9C0FE3B2-27E6-4DA9-8479-B34E3014AC55",
"versionEndExcluding": "3.5.4",
"versionStartIncluding": "3.5.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*",
"matchCriteriaId": "0AAF5776-8121-49B5-A6AE-815B7CCAC307",
"versionEndExcluding": "3.6.2",
"versionStartIncluding": "3.6.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "An integer overflow during the parsing of XML using the Expat library. This vulnerability affects Firefox \u003c 50."
},
{
"lang": "es",
"value": "Desbordamiento de enteros durante el an\u00e1lisis de XML mediante la biblioteca Expat. La vulnerabilidad afecta a Firefox en versiones anteriores a la 50."
}
],
"id": "CVE-2016-9063",
"lastModified": "2026-10-08T21:17:05.440",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "HIGH",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 7.5,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 6.4,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 5.9,
"source": "nvd@nist.gov",
"type": "Primary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2016-9063",
"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-08T20:58:11.571362Z",
"version": "2.0.3"
}
}
]
},
"published": "2018-06-11T21:29:00.997",
"references": [
{
"source": "security@mozilla.org",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://www.securityfocus.com/bid/94337"
},
{
"source": "security@mozilla.org",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://www.securitytracker.com/id/1037298"
},
{
"source": "security@mozilla.org",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://www.securitytracker.com/id/1039427"
},
{
"source": "security@mozilla.org",
"tags": [
"Issue Tracking",
"Vendor Advisory"
],
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1274777"
},
{
"source": "security@mozilla.org",
"tags": [
"Third Party Advisory"
],
"url": "https://www.debian.org/security/2017/dsa-3898"
},
{
"source": "security@mozilla.org",
"tags": [
"Vendor Advisory"
],
"url": "https://www.mozilla.org/security/advisories/mfsa2016-89/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://www.securityfocus.com/bid/94337"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://www.securitytracker.com/id/1037298"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://www.securitytracker.com/id/1039427"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Issue Tracking",
"Vendor Advisory"
],
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1274777"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://www.debian.org/security/2017/dsa-3898"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "https://www.mozilla.org/security/advisories/mfsa2016-89/"
}
],
"sourceIdentifier": "security@mozilla.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-190"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Low",
"current_release_date": "2026-05-14T18:39:45+00:00",
"cve": "CVE-2016-9063",
"id": "CVE-2016-9063",
"initial_release_date": "2016-11-15T00:00:00+00:00",
"product_status:known_affected": "21",
"product_status:known_not_affected": "18",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "firefox: Possible integer overflow to fix inside XML_Parse in Expat",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2016/cve-2016-9063.json",
"version": "3"
},
"vulnrichment": {
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-06T02:42:10.630Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"name": "DSA-3898",
"tags": [
"vendor-advisory",
"x_refsource_DEBIAN",
"x_transferred"
],
"url": "https://www.debian.org/security/2017/dsa-3898"
},
{
"name": "94337",
"tags": [
"vdb-entry",
"x_refsource_BID",
"x_transferred"
],
"url": "http://www.securityfocus.com/bid/94337"
},
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1274777"
},
{
"name": "1037298",
"tags": [
"vdb-entry",
"x_refsource_SECTRACK",
"x_transferred"
],
"url": "http://www.securitytracker.com/id/1037298"
},
{
"name": "1039427",
"tags": [
"vdb-entry",
"x_refsource_SECTRACK",
"x_transferred"
],
"url": "http://www.securitytracker.com/id/1039427"
},
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://www.mozilla.org/security/advisories/mfsa2016-89/"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2016-9063",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-08T20:58:11.571362Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-10-08T20:58:12.241Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Firefox",
"vendor": "Mozilla",
"versions": [
{
"lessThan": "50",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
}
],
"datePublic": "2016-11-15T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "An integer overflow during the parsing of XML using the Expat library. This vulnerability affects Firefox \u003c 50."
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "Possible integer overflow to fix inside XML_Parse in Expat",
"lang": "en",
"type": "text"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2018-06-12T09:57:01.000Z",
"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
"shortName": "mozilla"
},
"references": [
{
"name": "DSA-3898",
"tags": [
"vendor-advisory",
"x_refsource_DEBIAN"
],
"url": "https://www.debian.org/security/2017/dsa-3898"
},
{
"name": "94337",
"tags": [
"vdb-entry",
"x_refsource_BID"
],
"url": "http://www.securityfocus.com/bid/94337"
},
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1274777"
},
{
"name": "1037298",
"tags": [
"vdb-entry",
"x_refsource_SECTRACK"
],
"url": "http://www.securitytracker.com/id/1037298"
},
{
"name": "1039427",
"tags": [
"vdb-entry",
"x_refsource_SECTRACK"
],
"url": "http://www.securitytracker.com/id/1039427"
},
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://www.mozilla.org/security/advisories/mfsa2016-89/"
}
],
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "security@mozilla.org",
"ID": "CVE-2016-9063",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "Firefox",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_value": "50"
}
]
}
}
]
},
"vendor_name": "Mozilla"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "An integer overflow during the parsing of XML using the Expat library. This vulnerability affects Firefox \u003c 50."
}
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "Possible integer overflow to fix inside XML_Parse in Expat"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "DSA-3898",
"refsource": "DEBIAN",
"url": "https://www.debian.org/security/2017/dsa-3898"
},
{
"name": "94337",
"refsource": "BID",
"url": "http://www.securityfocus.com/bid/94337"
},
{
"name": "https://bugzilla.mozilla.org/show_bug.cgi?id=1274777",
"refsource": "CONFIRM",
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1274777"
},
{
"name": "1037298",
"refsource": "SECTRACK",
"url": "http://www.securitytracker.com/id/1037298"
},
{
"name": "1039427",
"refsource": "SECTRACK",
"url": "http://www.securitytracker.com/id/1039427"
},
{
"name": "https://www.mozilla.org/security/advisories/mfsa2016-89/",
"refsource": "CONFIRM",
"url": "https://www.mozilla.org/security/advisories/mfsa2016-89/"
}
]
}
}
}
},
"cveMetadata": {
"assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
"assignerShortName": "mozilla",
"cveId": "CVE-2016-9063",
"datePublished": "2018-06-11T21:00:00.000Z",
"dateReserved": "2016-10-27T00:00:00.000Z",
"dateUpdated": "2026-10-08T21:03:21.752Z",
"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…