CVE-2026-78253
📛 CVE Title
Denial-of-service (stack-exhaustion) vulnerability in QXmlStreamReader::readElementText() impacts Qt
Description
Uncontrolled recursion in QXmlStreamReader::readElementText() in Qt Group Qt allows attackers to cause a denial of service (application crash via stack exhaustion) via a crafted XML document.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- Qt
- CVSS severity
- LOW
- CVSS score
- 2.3 / 10
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/S:N/AU:N/R:U/RE:L/U:Green- Effective score
- 2.3 / 10 LOW source: CNA overview
- CWE(s)
-
CWE-674 - Reserved
- 2026-08-24
- Published
- 2026-09-23 11:39 UTC
- Last updated
- 2026-09-23 14:36 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/78xxx/CVE-2026-78253.json
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2026-09-23 12:17:07 UTC
- NVD last modified
- 2026-09-23 15:17:20 UTC
NVD / KEV / EPSS data refreshed 2026-09-24 04:35 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2026-85238 - Assigner
- Qt
- Published
- Sep 23, 2026, 11:39:03 AM
- Updated
- Sep 23, 2026, 2:36:41 PM
- EUVD base score (CVSS 4.0)
-
2.3 / 10
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/S:N/AU:N/R:U/RE:L/U:Green - EUVD-reported EPSS
- 0.0000
- Vendors
- Qt
- Products
-
Qt (6.9.0 ≤6.11.1)Qt (5.0.0 ≤6.8.8)
- Aliases
-
GHSA-cpqc-q57w-7c2q
ENISA description: Uncontrolled recursion in QXmlStreamReader::readElementText() in Qt Group Qt allows attackers to cause a denial of service (application crash via stack exhaustion) via a crafted XML document.
EUVD references (1)
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| qt | qt |
5.0.0 (affected),
6.9.0 (affected)
|
— |
Vendor references (1)
References embedded in the original CVE record by the assigning CNA.
- dev patch patch
Web references (0)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
No web references attached yet.
NVD-tagged references (1)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- https://codereview.qt-project.org/c/qt/qtbase/+/754345 a59d8014-47c4-4630-ab43-e1b13cbe58e3
Remediations (10)
-
web:msrc.microsoft.com
The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.
2026-09-24 11:50 UTC -
web:msrc.microsoft.com
Security Update Guide - Microsoft Security Response Center
2026-09-24 11:50 UTC -
web:sec.cloudapps.cisco.com
On September 16, 2026 , the Cisco Product Security Incident Response Team (PSIRT) published the advisories that are listed in the following tables. To remediate these vulnerabilities, Cisco strongly recommends that customers upgrade to the fixed software that is indicated in the advisories. For more information about changes in Cisco PSIRT vulnerability disclosure, see Strengthening the ...
2026-09-24 11:50 UTC -
web:senserva.com
Every Microsoft security patch (KB) and the CVEs it fixes, with severity, CVSS, and CISA KEV status. Cross-linked to the CVE reference.
2026-09-24 11:50 UTC -
web:support.sap.com
SAP security Patch Day Bulletin This post shares the information on security notes that remediate vulnerabilities discovered in SAP products. SAP strongly recommends that the customer visits the support portal and applies patches on priority to protect their SAP landscape. On 9th of June 2026 , SAP security patch day saw the release of 15 new security notes.
2026-09-24 11:50 UTC -
web:support.sap.com
SAP security Patch Day Bulletin This post shares the information on security notes that remediate vulnerabilities discovered in SAP products. SAP strongly recommends that the customer visits the support portal and applies patches on priority to protect their SAP landscape. On 12 th of May 2026 , SAP security patch day saw the release of 15 new security notes.
2026-09-24 11:50 UTC -
web:www.oracle.com
This Critical Patch Update contains 1448 new security patches across the product families listed below. Please note that a My Oracle Support (MOS) note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at July 2026 Critical Patch Update: Executive Summary and Analysis.
2026-09-24 11:50 UTC -
web:www.oracle.com
Additional CVEs addressed are: The patch for CVE - 2026 -34481 also addresses CVE - 2026 -34477, CVE - 2026 -34478, CVE - 2026 -34479, and CVE - 2026 -34480. Oracle Fusion Middleware Risk Matrix This Critical Security Patch Update contains 106 new security patches for Oracle Fusion Middleware. 53 of these vulnerabilities may be remotely exploitable without authentication, i.e., may be exploited over a ...
2026-09-24 11:50 UTC -
web:www.qt.io
A denial-of-service (stack-exhaustion) vulnerability in the QXmlStreamReader::readElementText () function of the XML parsing functionality of Qt Core has been discovered and has been assigned the CVE id CVE-2026-78253 .
2026-09-24 11:50 UTC -
web:zecurit.com
Get the complete breakdown of Microsoft's September 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .
2026-09-24 11:50 UTC
AI Forensic Analysis
Only Available for Registered Users. Sign in to view.
Raw JSON
The full cvelistV5 record. Download as CVE-2026-78253.json.
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-78253",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-23T14:35:55.687793Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-09-23T14:36:41.208Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"modules": [
"qtbase"
],
"product": "qt",
"vendor": "qt",
"versions": [
{
"lessThanOrEqual": "6.8.8",
"status": "affected",
"version": "5.0.0",
"versionType": "python"
},
{
"lessThanOrEqual": "6.11.1",
"status": "affected",
"version": "6.9.0",
"versionType": "python"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*",
"versionEndIncluding": "6.8.8",
"versionStartIncluding": "5.0.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*",
"versionEndIncluding": "6.11.1",
"versionStartIncluding": "6.9.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "OR"
}
],
"datePublic": "2026-09-23T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "<p>Uncontrolled recursion in <code>QXmlStreamReader::readElementText()</code> in Qt Group Qt allows attackers to cause a denial of service (application crash via stack exhaustion) via a crafted XML document.</p>"
}
],
"value": "Uncontrolled recursion in QXmlStreamReader::readElementText() in Qt Group Qt allows attackers to cause a denial of service (application crash via stack exhaustion) via a crafted XML document."
}
],
"impacts": [
{
"capecId": "CAPEC-230",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-230 Serialized Data with Nested Payloads"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NO",
"Recovery": "USER",
"Safety": "NEGLIGIBLE",
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 2.3,
"baseSeverity": "LOW",
"exploitMaturity": "UNREPORTED",
"privilegesRequired": "NONE",
"providerUrgency": "GREEN",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "PASSIVE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/S:N/AU:N/R:U/RE:L/U:Green",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "LOW"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-674",
"description": "CWE-674 Uncontrolled Recursion",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-23T11:39:03.788Z",
"orgId": "a59d8014-47c4-4630-ab43-e1b13cbe58e3",
"shortName": "Qt"
},
"references": [
{
"name": "dev patch",
"tags": [
"patch"
],
"url": "https://codereview.qt-project.org/c/qt/qtbase/+/754345"
}
],
"source": {
"discovery": "INTERNAL"
},
"title": "Denial-of-service (stack-exhaustion) vulnerability in QXmlStreamReader::readElementText() impacts Qt",
"x_generator": {
"engine": "Claude AI (Opus 5.5) - draft only, requires human validation before submission"
}
}
},
"cveMetadata": {
"assignerOrgId": "a59d8014-47c4-4630-ab43-e1b13cbe58e3",
"assignerShortName": "Qt",
"cveId": "CVE-2026-78253",
"datePublished": "2026-09-23T11:39:03.788Z",
"dateReserved": "2026-08-24T07:14:59.859Z",
"dateUpdated": "2026-09-23T14:36:41.208Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}