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vuln-cve/data/2026/69xxx/CVE-2026-69203.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-69203",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-08-03T16:57:50.124Z",
"datePublished": "2026-09-15T19:21:12.712Z",
"dateUpdated": "2026-09-15T19:36:32.272Z"
},
"containers": {
"cna": {
"title": "Http4s Ember HTTP/2: does not enforce SETTINGS_MAX_CONCURRENT_STREAMS",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-400",
"lang": "en",
"description": "CWE-400: Uncontrolled Resource Consumption",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-770",
"lang": "en",
"description": "CWE-770: Allocation of Resources Without Limits or Throttling",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"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"
}
}
],
"references": [
{
"name": "https://github.com/http4s/http4s/security/advisories/GHSA-9vwc-pc8p-253q",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/http4s/http4s/security/advisories/GHSA-9vwc-pc8p-253q"
},
{
"name": "https://github.com/http4s/http4s/commit/4983de1f93f2caaa3b9de310cf6a9db32c50d66e",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/http4s/http4s/commit/4983de1f93f2caaa3b9de310cf6a9db32c50d66e"
},
{
"name": "https://github.com/http4s/http4s/releases/tag/v0.23.35",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/http4s/http4s/releases/tag/v0.23.35"
},
{
"name": "https://github.com/http4s/http4s/releases/tag/v1.0.0-M47",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/http4s/http4s/releases/tag/v1.0.0-M47"
}
],
"affected": [
{
"vendor": "http4s",
"product": "http4s",
"versions": [
{
"version": "< 0.23.35",
"status": "affected"
},
{
"version": ">= 1.0.0-M1, < 1.0.0-M47",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-09-15T19:21:12.712Z"
},
"descriptions": [
{
"lang": "en",
"value": "Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, An Ember server with HTTP/2 enabled through withHttp2 does not enforce SETTINGS_MAX_CONCURRENT_STREAMS for peer-created streams. One unauthenticated connection can open an unbounded number of streams, each retaining per-stream state until heap exhaustion. The same unchecked allocation is reachable in an ember-client through server-initiated PUSH_PROMISE frames because enablePush is not enforced. This issue is fixed in versions 0.23.35 and 1.0.0-M47."
}
],
"source": {
"advisory": "GHSA-9vwc-pc8p-253q",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-09-15T19:36:24.682974Z",
"id": "CVE-2026-69203",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-09-15T19:36:32.272Z"
}
}
]
}
}