CVE-2026-102126 (GCVE-0-2026-102126)
Vulnerability from cvelistv5 – Published: 2026-09-30 20:15 – Updated: 2026-09-30 20:15
VLAI
EPSS
VEX
Title
Kiteworks Core Stored Cross-site Scripting (XSS)
Summary
A stored cross-site scripting (XSS) weakness in Kiteworks Core could allow an administrator holding only a single, narrowly scoped delegated permission to store crafted content that later executes arbitrary JavaScript in the authenticated session of a System Administrator who views the affected page. This could have permitted the lower-privileged administrator to escalate to full administrative control of the tenant, including the creation of a new administrative account.
Severity
8.1 (High)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
References
2 references
| URL | Tags |
|---|---|
| https://github.com/kiteworks/security-advisories/… | vendor-advisory |
| https://raw.githubusercontent.com/cisagov/CSAF/de… | third-party-advisory |
Impacted products
Date Public
2026-09-30 00:00
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unknown",
"product": "Core",
"vendor": "Kiteworks",
"versions": [
{
"lessThan": "9.5.1",
"status": "affected",
"version": "0",
"versionType": "custom"
},
{
"status": "unaffected",
"version": "9.5.1"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Icare, https://yeswehack.com/hunters/icare"
},
{
"lang": "en",
"value": "Supr4s, https://yeswehack.com/hunters/Supr4s"
},
{
"lang": "en",
"value": "wlayzz, https://yeswehack.com/hunters/wlayzz"
},
{
"lang": "en",
"value": "truff, https://yeswehack.com/hunters/truff"
}
],
"datePublic": "2026-09-30T00:00:00.000Z",
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}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 8.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "HIGH",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "CWE-79 Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
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},
"references": [
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"tags": [
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],
"url": "https://github.com/kiteworks/security-advisories/security/advisories/GHSA-ccfx-6hq4-fx4g"
},
{
"name": "url",
"tags": [
"third-party-advisory"
],
"url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/VA/white/2026/va-26-274-01.json"
}
],
"title": "Kiteworks Core Stored Cross-site Scripting (XSS)",
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"cveMetadata": {
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"assignerShortName": "cisa-cg",
"cveId": "CVE-2026-102126",
"datePublished": "2026-09-30T20:15:09.284Z",
"dateReserved": "2026-09-28T17:39:13.563Z",
"dateUpdated": "2026-09-30T20:15:09.284Z",
"state": "PUBLISHED"
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"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
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}
],
"id": "CVE-2026-102126",
"lastModified": "2026-10-01T02:17:43.350",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N",
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"source": "9119a7d8-5eab-497f-8521-727c672e3725",
"type": "Secondary"
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"published": "2026-09-30T21:17:00.963",
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}
}
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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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