CVE-2026-16999 (GCVE-0-2026-16999)
Vulnerability from cvelistv5 – Published: 2026-08-12 13:53 – Updated: 2026-08-12 18:47
VLAI
EPSS
VEX
Title
XXE in Ministry of Justice's UYAP Document Editor
Summary
Improper restriction of XML external entity reference vulnerability in Ministry of Justice UYAP Document Editor allows Serialized Data External Linking.
This issue affects UYAP Document Editor: from 4.5.17 before 5.4.17.
Severity
6.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-12 18:47 UTC
CWE
- CWE-611 - Improper restriction of XML external entity reference
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://siberguvenlik.gov.tr/guvenlik-bildirimler… | government-resource |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Ministry of Justice | UYAP Document Editor |
Affected:
4.5.17 , < 5.4.17
(custom)
|
Date Public
2026-08-12 13:45
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-16999",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-12T18:47:07.671400Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-08-12T18:47:18.379Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "UYAP Document Editor",
"vendor": "Ministry of Justice",
"versions": [
{
"lessThan": "5.4.17",
"status": "affected",
"version": "4.5.17",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Mustafa An\u0131l YILDIRIM"
},
{
"lang": "en",
"type": "finder",
"value": "Beg\u00fcm ERDAL"
}
],
"datePublic": "2026-08-12T13:45:00.000Z",
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Improper restriction of XML external entity reference vulnerability in Ministry of Justice UYAP Document Editor allows Serialized Data External Linking.\u003cp\u003eThis issue affects UYAP Document Editor: from 4.5.17 before 5.4.17.\u003c/p\u003e"
}
],
"value": "Improper restriction of XML external entity reference vulnerability in Ministry of Justice UYAP Document Editor allows Serialized Data External Linking.\n\nThis issue affects UYAP Document Editor: from 4.5.17 before 5.4.17."
}
],
"impacts": [
{
"capecId": "CAPEC-201",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-201 Serialized Data External Linking"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "NONE",
"baseScore": 6.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-611",
"description": "CWE-611 Improper restriction of XML external entity reference",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-12T13:53:18.644Z",
"orgId": "ca940d4e-fea4-4aa2-9a58-591a58b1ce21",
"shortName": "TR-CERT"
},
"references": [
{
"tags": [
"government-resource"
],
"url": "https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-0818"
}
],
"source": {
"advisory": "TR-26-0818",
"defect": [
"TR-26-0818"
],
"discovery": "UNKNOWN"
},
"title": "XXE in Ministry of Justice\u0027s UYAP Document Editor",
"x_generator": {
"engine": "Vulnogram 1.0.4"
}
}
},
"cveMetadata": {
"assignerOrgId": "ca940d4e-fea4-4aa2-9a58-591a58b1ce21",
"assignerShortName": "TR-CERT",
"cveId": "CVE-2026-16999",
"datePublished": "2026-08-12T13:53:18.644Z",
"dateReserved": "2026-07-24T09:22:51.337Z",
"dateUpdated": "2026-08-12T18:47:18.379Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-16999",
"date": "2026-08-14",
"epss": "0.00128",
"percentile": "0.02906"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2026-16999\",\"sourceIdentifier\":\"iletisim@usom.gov.tr\",\"published\":\"2026-08-12T14:17:47.890\",\"lastModified\":\"2026-08-12T19:17:30.023\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Improper restriction of XML external entity reference vulnerability in Ministry of Justice UYAP Document Editor allows Serialized Data External Linking.\\n\\nThis issue affects UYAP Document Editor: from 4.5.17 before 5.4.17.\"}],\"affected\":[{\"source\":\"iletisim@usom.gov.tr\",\"affectedData\":[{\"vendor\":\"Ministry of Justice\",\"product\":\"UYAP Document Editor\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"4.5.17\",\"lessThan\":\"5.4.17\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"iletisim@usom.gov.tr\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N\",\"baseScore\":6.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":1.8,\"impactScore\":4.0}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-08-12T18:47:07.671400Z\",\"id\":\"CVE-2026-16999\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"iletisim@usom.gov.tr\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-611\"}]}],\"references\":[{\"url\":\"https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-0818\",\"source\":\"iletisim@usom.gov.tr\"}]}}",
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-16999\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-08-12T18:47:07.671400Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-08-12T18:47:14.835Z\"}}], \"cna\": {\"title\": \"XXE in Ministry of Justice\u0027s UYAP Document Editor\", \"source\": {\"defect\": [\"TR-26-0818\"], \"advisory\": \"TR-26-0818\", \"discovery\": \"UNKNOWN\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Mustafa An\\u0131l YILDIRIM\"}, {\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Beg\\u00fcm ERDAL\"}], \"impacts\": [{\"capecId\": \"CAPEC-201\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC-201 Serialized Data External Linking\"}]}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"CHANGED\", \"version\": \"3.1\", \"baseScore\": 6.3, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"REQUIRED\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"Ministry of Justice\", \"product\": \"UYAP Document Editor\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.5.17\", \"lessThan\": \"5.4.17\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unaffected\"}], \"datePublic\": \"2026-08-12T13:45:00.000Z\", \"references\": [{\"url\": \"https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-0818\", \"tags\": [\"government-resource\"]}], \"x_generator\": {\"engine\": \"Vulnogram 1.0.4\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"Improper restriction of XML external entity reference vulnerability in Ministry of Justice UYAP Document Editor allows Serialized Data External Linking.\\n\\nThis issue affects UYAP Document Editor: from 4.5.17 before 5.4.17.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"Improper restriction of XML external entity reference vulnerability in Ministry of Justice UYAP Document Editor allows Serialized Data External Linking.\u003cp\u003eThis issue affects UYAP Document Editor: from 4.5.17 before 5.4.17.\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-611\", \"description\": \"CWE-611 Improper restriction of XML external entity reference\"}]}], \"providerMetadata\": {\"orgId\": \"ca940d4e-fea4-4aa2-9a58-591a58b1ce21\", \"shortName\": \"TR-CERT\", \"dateUpdated\": \"2026-08-12T13:53:18.644Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-16999\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-12T18:47:18.379Z\", \"dateReserved\": \"2026-07-24T09:22:51.337Z\", \"assignerOrgId\": \"ca940d4e-fea4-4aa2-9a58-591a58b1ce21\", \"datePublished\": \"2026-08-12T13:53:18.644Z\", \"assignerShortName\": \"TR-CERT\"}",
"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…
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.
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.
Loading…
Loading…