132 lines
5.4 KiB
JSON
132 lines
5.4 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-55367",
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"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"state": "PUBLISHED",
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"assignerShortName": "GitHub_M",
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"dateReserved": "2026-06-16T18:57:40.180Z",
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"datePublished": "2026-11-04T21:39:41.868Z",
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"dateUpdated": "2026-11-05T20:01:20.480Z"
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},
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"containers": {
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"cna": {
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"title": "h2o: heap exhaustion using capsules",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-770",
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"lang": "en",
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"description": "CWE-770: Allocation of Resources Without Limits or Throttling",
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"type": "CWE"
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}
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]
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"attackComplexity": "LOW",
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"attackVector": "NETWORK",
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"availabilityImpact": "HIGH",
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"baseScore": 7.5,
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"baseSeverity": "HIGH",
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"confidentialityImpact": "NONE",
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"integrityImpact": "NONE",
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"privilegesRequired": "NONE",
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"scope": "UNCHANGED",
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"userInteraction": "NONE",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"version": "3.1"
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}
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}
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],
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"references": [
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{
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"name": "https://github.com/h2o/h2o/security/advisories/GHSA-q342-qp8v-p44c",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/h2o/h2o/security/advisories/GHSA-q342-qp8v-p44c"
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},
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{
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"name": "https://github.com/h2o/h2o/pull/3754",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/h2o/h2o/pull/3754"
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},
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{
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"name": "https://github.com/h2o/h2o/commit/4212ce114506a073505fd389db16ad2ba4e582a0",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/h2o/h2o/commit/4212ce114506a073505fd389db16ad2ba4e582a0"
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}
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],
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"affected": [
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{
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"vendor": "h2o",
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"product": "h2o",
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"versions": [
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{
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"version": "< 4212ce114506a073505fd389db16ad2ba4e582a0",
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"status": "affected"
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}
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]
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}
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],
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"providerMetadata": {
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"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"shortName": "GitHub_M",
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"dateUpdated": "2026-11-04T21:39:41.868Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 4212ce114506a073505fd389db16ad2ba4e582a0, a client could send an incomplete CONNECT-UDP Capsule with an excessively large declared length, causing H2O to keep buffering received bytes without a per-Capsule limit while waiting for the remainder. Deployments that enabled proxy.connect-udp and accepted CONNECT-UDP requests could exhaust server memory and lose availability. This vulnerability is fixed with commit 4212ce114506a073505fd389db16ad2ba4e582a0."
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}
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],
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"source": {
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"advisory": "GHSA-q342-qp8v-p44c",
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"discovery": "UNKNOWN"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-11-05T19:59:16.316316Z",
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"id": "CVE-2026-55367",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "yes"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-11-05T20:01:20.480Z"
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}
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}
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]
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}
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} |