CVE-2026-115775 (GCVE-0-2026-115775)
Vulnerability from cvelistv5 – Published: 2026-10-23 20:16 – Updated: 2026-10-23 20:16
VLAI
EPSS
VEX
Title
Twisted: Unauthenticated Remote Denial of Service in the Twisted words domish XML Element Stream via an Unbounded Element Tree
Summary
Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 26.10.0rc1, the twisted.words.xish.domish ExpatElementStream parser allows an unauthenticated remote peer to keep a container element open while continuously adding child elements. The parser retains the unfinished stanza as an in-memory tree without a byte or element-count limit, and XMPP pre-authentication stream parsing exposes this behavior before credentials are accepted. A single connection can therefore exhaust server memory and terminate the process. This issue is fixed in version 26.10.0rc1.
Severity
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/twisted/twisted/security/advis… | x_refsource_CONFIRM |
| https://github.com/twisted/twisted/pull/12751 | x_refsource_MISC |
| https://github.com/twisted/twisted/commit/8873814… | x_refsource_MISC |
| https://github.com/twisted/twisted/releases/tag/t… | x_refsource_MISC |
Impacted products
{
"containers": {
"cna": {
"affected": [
{
"product": "twisted",
"vendor": "twisted",
"versions": [
{
"status": "affected",
"version": "\u003c 26.10.0rc1"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 26.10.0rc1, the twisted.words.xish.domish ExpatElementStream parser allows an unauthenticated remote peer to keep a container element open while continuously adding child elements. The parser retains the unfinished stanza as an in-memory tree without a byte or element-count limit, and XMPP pre-authentication stream parsing exposes this behavior before credentials are accepted. A single connection can therefore exhaust server memory and terminate the process. This issue is fixed in version 26.10.0rc1."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 8.7,
"baseSeverity": "HIGH",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-400",
"description": "CWE-400: Uncontrolled Resource Consumption",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-770",
"description": "CWE-770: Allocation of Resources Without Limits or Throttling",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-23T20:16:29.913Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/twisted/twisted/security/advisories/GHSA-3476-c5c2-fr73",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/twisted/twisted/security/advisories/GHSA-3476-c5c2-fr73"
},
{
"name": "https://github.com/twisted/twisted/pull/12751",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/twisted/twisted/pull/12751"
},
{
"name": "https://github.com/twisted/twisted/commit/8873814bec8288e2466fad4d2c4d64039beb88b0",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/twisted/twisted/commit/8873814bec8288e2466fad4d2c4d64039beb88b0"
},
{
"name": "https://github.com/twisted/twisted/releases/tag/twisted-26.10.0rc1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/twisted/twisted/releases/tag/twisted-26.10.0rc1"
}
],
"source": {
"advisory": "GHSA-3476-c5c2-fr73",
"discovery": "UNKNOWN"
},
"title": "Twisted: Unauthenticated Remote Denial of Service in the Twisted words domish XML Element Stream via an Unbounded Element Tree"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-115775",
"datePublished": "2026-10-23T20:16:29.913Z",
"dateReserved": "2026-10-23T13:28:51.847Z",
"dateUpdated": "2026-10-23T20:16:29.913Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
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"date": "2026-10-25",
"epss": "0.00444",
"percentile": "0.38312"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"product": "twisted",
"vendor": "twisted",
"versions": [
{
"status": "affected",
"version": "\u003c 26.10.0rc1"
}
]
}
],
"source": "security-advisories@github.com"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 26.10.0rc1, the twisted.words.xish.domish ExpatElementStream parser allows an unauthenticated remote peer to keep a container element open while continuously adding child elements. The parser retains the unfinished stanza as an in-memory tree without a byte or element-count limit, and XMPP pre-authentication stream parsing exposes this behavior before credentials are accepted. A single connection can therefore exhaust server memory and terminate the process. This issue is fixed in version 26.10.0rc1."
}
],
"id": "CVE-2026-115775",
"lastModified": "2026-10-23T21:17:23.050",
"metrics": {
"cvssMetricV40": [
{
"cvssData": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"availabilityRequirement": "NOT_DEFINED",
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"baseSeverity": "HIGH",
"confidentialityRequirement": "NOT_DEFINED",
"exploitMaturity": "NOT_DEFINED",
"integrityRequirement": "NOT_DEFINED",
"modifiedAttackComplexity": "NOT_DEFINED",
"modifiedAttackRequirements": "NOT_DEFINED",
"modifiedAttackVector": "NOT_DEFINED",
"modifiedPrivilegesRequired": "NOT_DEFINED",
"modifiedSubAvailabilityImpact": "NOT_DEFINED",
"modifiedSubConfidentialityImpact": "NOT_DEFINED",
"modifiedSubIntegrityImpact": "NOT_DEFINED",
"modifiedUserInteraction": "NOT_DEFINED",
"modifiedVulnAvailabilityImpact": "NOT_DEFINED",
"modifiedVulnConfidentialityImpact": "NOT_DEFINED",
"modifiedVulnIntegrityImpact": "NOT_DEFINED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"source": "security-advisories@github.com",
"type": "Secondary"
}
]
},
"published": "2026-10-23T21:17:23.050",
"references": [
{
"source": "security-advisories@github.com",
"url": "https://github.com/twisted/twisted/commit/8873814bec8288e2466fad4d2c4d64039beb88b0"
},
{
"source": "security-advisories@github.com",
"url": "https://github.com/twisted/twisted/pull/12751"
},
{
"source": "security-advisories@github.com",
"url": "https://github.com/twisted/twisted/releases/tag/twisted-26.10.0rc1"
},
{
"source": "security-advisories@github.com",
"url": "https://github.com/twisted/twisted/security/advisories/GHSA-3476-c5c2-fr73"
}
],
"sourceIdentifier": "security-advisories@github.com",
"vulnStatus": "Received",
"weaknesses": [
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{
"lang": "en",
"value": "CWE-400"
},
{
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}
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},
"redhat_vex": {
"aggregate_severity": "Important",
"current_release_date": "2026-10-23T20:50:43+00:00",
"cve": "CVE-2026-115775",
"id": "CVE-2026-115775",
"initial_release_date": "2026-10-23T20:16:29.913000+00:00",
"product_status:known_affected": "16",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "twisted: twisted: Denial of Service via memory exhaustion in XML stream parser",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-115775.json",
"version": "3"
}
}
}
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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