CVE-2026-15308 (GCVE-0-2026-15308)
Vulnerability from cvelistv5 – Published: 2026-07-09 17:10 – Updated: 2026-08-13 00:28
VLAI
EPSS
VEX
Title
Incremental HTMLParser feed() allows CPU-exhaustion DoS via repeated unterminated markup declarations
Summary
The incremental HTML parser (html.parser.HTMLParser) allows for CPU
denial-of-service through repeated unterminated markup declarations when
processing uncontrolled data.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-09 17:31 UTC
CWE
Assigner
References
11 references
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.10.21
(python)
Affected: 3.11.0 , < 3.11.16 (python) Affected: 3.12.0 , < 3.12.14 (python) Affected: 3.13.0 , < 3.13.15 (python) Affected: 3.14.0 , < 3.14.7 (python) Affected: 3.15.0a1 , < 3.15.0b4 (python) |
guessed |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-15308",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-09T17:31:19.781935Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-09T17:31:27.360Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
},
{
"providerMetadata": {
"dateUpdated": "2026-07-09T19:32:36.790Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "http://www.openwall.com/lists/oss-security/2026/07/09/4"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"modules": [
"html.parser",
"html"
],
"product": "CPython",
"repo": "https://github.com/python/cpython",
"vendor": "Python Software Foundation",
"versions": [
{
"lessThan": "3.10.21",
"status": "affected",
"version": "0",
"versionType": "python"
},
{
"lessThan": "3.11.16",
"status": "affected",
"version": "3.11.0",
"versionType": "python"
},
{
"lessThan": "3.12.14",
"status": "affected",
"version": "3.12.0",
"versionType": "python"
},
{
"lessThan": "3.13.15",
"status": "affected",
"version": "3.13.0",
"versionType": "python"
},
{
"lessThan": "3.14.7",
"status": "affected",
"version": "3.14.0",
"versionType": "python"
},
{
"lessThan": "3.15.0b4",
"status": "affected",
"version": "3.15.0a1",
"versionType": "python"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "Edward-x (https://github.com/YLChen-007)"
},
{
"lang": "en",
"type": "remediation developer",
"value": "Serhiy Storchaka (https://github.com/serhiy-storchaka)"
},
{
"lang": "en",
"type": "remediation reviewer",
"value": "Gregory P. Smith (https://github.com/gpshead)"
},
{
"lang": "en",
"type": "coordinator",
"value": "Seth Larson (https://github.com/sethmlarson)"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "The incremental HTML parser (html.parser.HTMLParser) allows for CPU\ndenial-of-service through repeated unterminated markup declarations when\nprocessing uncontrolled data."
}
],
"value": "The incremental HTML parser (html.parser.HTMLParser) allows for CPU\ndenial-of-service through repeated unterminated markup declarations when\nprocessing uncontrolled data."
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 8.7,
"baseSeverity": "HIGH",
"exploitMaturity": "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",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-400",
"description": "CWE-400",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-13T00:28:26.690Z",
"orgId": "28c92f92-d60d-412d-b760-e73465c3df22",
"shortName": "PSF"
},
"references": [
{
"tags": [
"vendor-advisory"
],
"url": "https://mail.python.org/archives/list/security-announce@python.org/thread/F6453LWKSHKCTWFLCOURWPLETNUIW2Z5/"
},
{
"tags": [
"patch"
],
"url": "https://github.com/python/cpython/pull/153031"
},
{
"tags": [
"issue-tracking"
],
"url": "https://github.com/python/cpython/issues/153030"
},
{
"tags": [
"patch"
],
"url": "https://github.com/python/cpython/commit/07efb08123ba9367a7107325adb9d5626dca1ca9"
},
{
"tags": [
"patch"
],
"url": "https://github.com/python/cpython/commit/7933f4bf7131aa4140750f9404f5de0aa2969ced"
},
{
"tags": [
"patch"
],
"url": "https://github.com/python/cpython/commit/bcf98ddbc40ec9b3ee87da0124a5660b19b7e606"
},
{
"tags": [
"patch"
],
"url": "https://github.com/python/cpython/commit/e9f92ac0b298292e7ff998e52cb8ccacfb27a0bd"
},
{
"tags": [
"patch"
],
"url": "https://github.com/python/cpython/commit/785df8f743800661961528970f8598edcd291c14"
},
{
"tags": [
"patch"
],
"url": "https://github.com/python/cpython/commit/1e7956f1a722df9aabc509c30f8fbdc3a2b4fdc7"
},
{
"tags": [
"patch"
],
"url": "https://github.com/python/cpython/commit/c2390b9376e35a701ed3acc597b8fc87546c9b00"
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "Incremental HTMLParser feed() allows CPU-exhaustion DoS via repeated unterminated markup declarations",
"x_generator": {
"engine": "cvelib 1.8.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "28c92f92-d60d-412d-b760-e73465c3df22",
"assignerShortName": "PSF",
"cveId": "CVE-2026-15308",
"datePublished": "2026-07-09T17:10:57.317Z",
"dateReserved": "2026-07-09T17:04:11.926Z",
"dateUpdated": "2026-08-13T00:28:26.690Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-15308",
"date": "2026-09-19",
"epss": "0.00637",
"percentile": "0.49097"
},
"microsoft_vex": {
"current_release_date": "2026-08-13T00:11:00.000Z",
"cve": "CVE-2026-15308",
"id": "msrc_CVE-2026-15308",
"initial_release_date": "2026-07-12T01:01:27.000Z",
"product_status:known_affected": "2",
"product_status:known_not_affected": "1",
"source": "Microsoft CSAF VEX",
"status": "final",
"title": "Incremental HTMLParser feed() allows CPU-exhaustion DoS via repeated unterminated markup declarations",
"url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-15308.json",
"version": "4"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"modules": [
"html.parser",
"html"
],
"product": "CPython",
"repo": "https://github.com/python/cpython",
"vendor": "Python Software Foundation",
"versions": [
{
"lessThan": "3.10.21",
"status": "affected",
"version": "0",
"versionType": "python"
},
{
"lessThan": "3.11.16",
"status": "affected",
"version": "3.11.0",
"versionType": "python"
},
{
"lessThan": "3.12.14",
"status": "affected",
"version": "3.12.0",
"versionType": "python"
},
{
"lessThan": "3.13.15",
"status": "affected",
"version": "3.13.0",
"versionType": "python"
},
{
"lessThan": "3.14.7",
"status": "affected",
"version": "3.14.0",
"versionType": "python"
},
{
"lessThan": "3.15.0b4",
"status": "affected",
"version": "3.15.0a1",
"versionType": "python"
}
]
}
],
"source": "cna@python.org"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*",
"matchCriteriaId": "35C0374F-6CC2-4546-8933-B382CD3A9225",
"versionEndExcluding": "3.10.21",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*",
"matchCriteriaId": "D409E2A6-22F1-47D5-A273-4772BF45925E",
"versionEndExcluding": "3.11.16",
"versionStartIncluding": "3.11.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*",
"matchCriteriaId": "15B3E361-E948-4A55-A163-E681B8E0EF16",
"versionEndExcluding": "3.12.14",
"versionStartIncluding": "3.12.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*",
"matchCriteriaId": "7DBD3E4F-47FF-48C4-8A44-D2EC2AF84E3C",
"versionEndExcluding": "3.13.15",
"versionStartIncluding": "3.13.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*",
"matchCriteriaId": "4EA7DE57-F5C8-4AD0-A8A8-5E9C3FC75310",
"versionEndExcluding": "3.14.7",
"versionStartIncluding": "3.14.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:python:python:3.15.0:alpha1:*:*:*:*:*:*",
"matchCriteriaId": "A3327507-0B1D-4F28-A983-D07A2C8A7696",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:python:python:3.15.0:alpha2:*:*:*:*:*:*",
"matchCriteriaId": "C8AF17F1-A27F-4C98-BA5A-B4319710E8D1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:python:python:3.15.0:alpha3:*:*:*:*:*:*",
"matchCriteriaId": "24CF56B0-2F4E-42A2-B655-F493AA0A4815",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:python:python:3.15.0:alpha4:*:*:*:*:*:*",
"matchCriteriaId": "7184ABBA-B100-489E-B5C1-1C9EEC0546CA",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:python:python:3.15.0:alpha5:*:*:*:*:*:*",
"matchCriteriaId": "B6D4181B-3E1B-499B-AAB1-50868A6A6AD3",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:python:python:3.15.0:alpha6:*:*:*:*:*:*",
"matchCriteriaId": "A52F6DD2-717D-4E8C-8DB7-00890BC1ABAE",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:python:python:3.15.0:alpha7:*:*:*:*:*:*",
"matchCriteriaId": "8C46C55C-801E-4F86-B669-8E6A12B4AB6F",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:python:python:3.15.0:alpha8:*:*:*:*:*:*",
"matchCriteriaId": "5A8DF8E5-61F9-4899-BF40-41A17E223441",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:python:python:3.15.0:beta1:*:*:*:*:*:*",
"matchCriteriaId": "B678A5A5-99CA-45B6-BB73-FB0BD2F7B9A3",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:python:python:3.15.0:beta2:*:*:*:*:*:*",
"matchCriteriaId": "691A8388-A0A3-4630-BB36-F334C670934F",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:python:python:3.15.0:beta3:*:*:*:*:*:*",
"matchCriteriaId": "E1218285-E822-45FD-8F5E-BBC80B93C6DA",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "The incremental HTML parser (html.parser.HTMLParser) allows for CPU\ndenial-of-service through repeated unterminated markup declarations when\nprocessing uncontrolled data."
}
],
"id": "CVE-2026-15308",
"lastModified": "2026-08-20T17:02:59.313",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
],
"cvssMetricV40": [
{
"cvssData": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"availabilityRequirement": "NOT_DEFINED",
"baseScore": 8.7,
"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": "cna@python.org",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-15308",
"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-09T17:31:19.781935Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-07-09T17:16:58.260",
"references": [
{
"source": "cna@python.org",
"tags": [
"Patch"
],
"url": "https://github.com/python/cpython/commit/07efb08123ba9367a7107325adb9d5626dca1ca9"
},
{
"source": "cna@python.org",
"tags": [
"Patch"
],
"url": "https://github.com/python/cpython/commit/1e7956f1a722df9aabc509c30f8fbdc3a2b4fdc7"
},
{
"source": "cna@python.org",
"tags": [
"Patch"
],
"url": "https://github.com/python/cpython/commit/785df8f743800661961528970f8598edcd291c14"
},
{
"source": "cna@python.org",
"tags": [
"Patch"
],
"url": "https://github.com/python/cpython/commit/7933f4bf7131aa4140750f9404f5de0aa2969ced"
},
{
"source": "cna@python.org",
"tags": [
"Patch"
],
"url": "https://github.com/python/cpython/commit/bcf98ddbc40ec9b3ee87da0124a5660b19b7e606"
},
{
"source": "cna@python.org",
"tags": [
"Patch"
],
"url": "https://github.com/python/cpython/commit/c2390b9376e35a701ed3acc597b8fc87546c9b00"
},
{
"source": "cna@python.org",
"tags": [
"Patch"
],
"url": "https://github.com/python/cpython/commit/e9f92ac0b298292e7ff998e52cb8ccacfb27a0bd"
},
{
"source": "cna@python.org",
"tags": [
"Patch"
],
"url": "https://github.com/python/cpython/issues/153030"
},
{
"source": "cna@python.org",
"tags": [
"Issue Tracking",
"Patch"
],
"url": "https://github.com/python/cpython/pull/153031"
},
{
"source": "cna@python.org",
"tags": [
"Mailing List"
],
"url": "https://mail.python.org/archives/list/security-announce@python.org/thread/F6453LWKSHKCTWFLCOURWPLETNUIW2Z5/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "http://www.openwall.com/lists/oss-security/2026/07/09/4"
}
],
"sourceIdentifier": "cna@python.org",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-400"
}
],
"source": "cna@python.org",
"type": "Secondary"
},
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Important",
"current_release_date": "2026-08-25T09:02:17+00:00",
"cve": "CVE-2026-15308",
"id": "CVE-2026-15308",
"initial_release_date": "2026-07-09T17:10:57.317000+00:00",
"product_status:fixed": "767",
"product_status:known_affected": "33",
"product_status:known_not_affected": "35",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "python: Python: CPU Denial of Service in HTML parser via repeated unterminated markup declarations",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-15308.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "important",
"current_release_date": "2026-09-16T00:16:12Z",
"cve": "CVE-2026-15308",
"id": "CVE-2026-15308",
"initial_release_date": "2026-07-11T03:28:42Z",
"product_status:first_fixed": "52",
"product_status:known_affected": "604",
"product_status:recommended": "568",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-15308",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-15308.json",
"version": "26"
},
"vulnrichment": {
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2026-07-09T19:32:36.790Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "http://www.openwall.com/lists/oss-security/2026/07/09/4"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-15308",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-09T17:31:19.781935Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-09T17:31:23.665Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"modules": [
"html.parser",
"html"
],
"product": "CPython",
"repo": "https://github.com/python/cpython",
"vendor": "Python Software Foundation",
"versions": [
{
"lessThan": "3.10.21",
"status": "affected",
"version": "0",
"versionType": "python"
},
{
"lessThan": "3.11.16",
"status": "affected",
"version": "3.11.0",
"versionType": "python"
},
{
"lessThan": "3.12.14",
"status": "affected",
"version": "3.12.0",
"versionType": "python"
},
{
"lessThan": "3.13.15",
"status": "affected",
"version": "3.13.0",
"versionType": "python"
},
{
"lessThan": "3.14.7",
"status": "affected",
"version": "3.14.0",
"versionType": "python"
},
{
"lessThan": "3.15.0b4",
"status": "affected",
"version": "3.15.0a1",
"versionType": "python"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "Edward-x (https://github.com/YLChen-007)"
},
{
"lang": "en",
"type": "remediation developer",
"value": "Serhiy Storchaka (https://github.com/serhiy-storchaka)"
},
{
"lang": "en",
"type": "remediation reviewer",
"value": "Gregory P. Smith (https://github.com/gpshead)"
},
{
"lang": "en",
"type": "coordinator",
"value": "Seth Larson (https://github.com/sethmlarson)"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "The incremental HTML parser (html.parser.HTMLParser) allows for CPU\ndenial-of-service through repeated unterminated markup declarations when\nprocessing uncontrolled data."
}
],
"value": "The incremental HTML parser (html.parser.HTMLParser) allows for CPU\ndenial-of-service through repeated unterminated markup declarations when\nprocessing uncontrolled data."
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 8.7,
"baseSeverity": "HIGH",
"exploitMaturity": "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",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-400",
"description": "CWE-400",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-13T00:28:26.690Z",
"orgId": "28c92f92-d60d-412d-b760-e73465c3df22",
"shortName": "PSF"
},
"references": [
{
"tags": [
"vendor-advisory"
],
"url": "https://mail.python.org/archives/list/security-announce@python.org/thread/F6453LWKSHKCTWFLCOURWPLETNUIW2Z5/"
},
{
"tags": [
"patch"
],
"url": "https://github.com/python/cpython/pull/153031"
},
{
"tags": [
"issue-tracking"
],
"url": "https://github.com/python/cpython/issues/153030"
},
{
"tags": [
"patch"
],
"url": "https://github.com/python/cpython/commit/07efb08123ba9367a7107325adb9d5626dca1ca9"
},
{
"tags": [
"patch"
],
"url": "https://github.com/python/cpython/commit/7933f4bf7131aa4140750f9404f5de0aa2969ced"
},
{
"tags": [
"patch"
],
"url": "https://github.com/python/cpython/commit/bcf98ddbc40ec9b3ee87da0124a5660b19b7e606"
},
{
"tags": [
"patch"
],
"url": "https://github.com/python/cpython/commit/e9f92ac0b298292e7ff998e52cb8ccacfb27a0bd"
},
{
"tags": [
"patch"
],
"url": "https://github.com/python/cpython/commit/785df8f743800661961528970f8598edcd291c14"
},
{
"tags": [
"patch"
],
"url": "https://github.com/python/cpython/commit/1e7956f1a722df9aabc509c30f8fbdc3a2b4fdc7"
},
{
"tags": [
"patch"
],
"url": "https://github.com/python/cpython/commit/c2390b9376e35a701ed3acc597b8fc87546c9b00"
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "Incremental HTMLParser feed() allows CPU-exhaustion DoS via repeated unterminated markup declarations",
"x_generator": {
"engine": "cvelib 1.8.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "28c92f92-d60d-412d-b760-e73465c3df22",
"assignerShortName": "PSF",
"cveId": "CVE-2026-15308",
"datePublished": "2026-07-09T17:10:57.317Z",
"dateReserved": "2026-07-09T17:04:11.926Z",
"dateUpdated": "2026-08-13T00:28:26.690Z",
"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…
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…