150 lines
6.1 KiB
JSON
150 lines
6.1 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-2026-63495",
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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": "2026-07-16T21:49:52.069Z",
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"datePublished": "2026-08-20T17:49:16.790Z",
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"dateUpdated": "2026-08-20T19:17:04.616Z"
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},
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"containers": {
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"cna": {
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"title": "Libevent: Unbounded memory accumulation in WebSocket server via fragmented frames",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-400",
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"lang": "en",
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"description": "CWE-400: Uncontrolled Resource Consumption",
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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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"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/libevent/libevent/security/advisories/GHSA-qx89-wf2v-vgmx",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/libevent/libevent/security/advisories/GHSA-qx89-wf2v-vgmx"
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},
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{
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"name": "https://github.com/libevent/libevent/commit/291c4d1cd75695e898030ebd5c4ddf26c094077b",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/libevent/libevent/commit/291c4d1cd75695e898030ebd5c4ddf26c094077b"
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},
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{
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"name": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha"
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}
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],
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"affected": [
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{
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"vendor": "libevent",
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"product": "libevent",
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"versions": [
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{
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"version": ">= 2.2.0-alpha-dev, < 2.2.2-alpha",
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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": "2026-08-20T17:49:16.790Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "Libevent is an event notification library. From 2.2.0-alpha-dev until 2.2.2-alpha, the libevent WebSocket server in ws.c accumulates fragmented frames in evws->incomplete_frames without enforcing a total message-size limit. An unauthenticated remote client can repeatedly send fragmented WebSocket frames below WS_MAX_RECV_FRAME_SZ with FIN=0, causing the evbuffer to grow without bound until the process or host exhausts memory. This issue is fixed in version 2.2.2-alpha."
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}
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],
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"source": {
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"advisory": "GHSA-qx89-wf2v-vgmx",
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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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"references": [
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{
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"url": "https://github.com/libevent/libevent/security/advisories/GHSA-qx89-wf2v-vgmx",
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"tags": [
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"exploit"
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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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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-08-20T19:16:58.376889Z",
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"id": "CVE-2026-63495",
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"options": [
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{
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"Exploitation": "poc"
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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": "2026-08-20T19:17:04.616Z"
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}
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}
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]
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}
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} |