128 lines
5.4 KiB
JSON
128 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-2026-47746",
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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": "2026-05-19T22:16:39.504Z",
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"datePublished": "2026-08-03T21:56:40.198Z",
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"dateUpdated": "2026-08-04T14:11:19.206Z"
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},
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"containers": {
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"cna": {
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"title": "Misskey: JSON-LD signature validation + compaction is vulnerable to timing attacks",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-367",
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"lang": "en",
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"description": "CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition",
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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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"cvssV4_0": {
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"attackVector": "NETWORK",
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"attackComplexity": "HIGH",
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"attackRequirements": "NONE",
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"privilegesRequired": "NONE",
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"userInteraction": "NONE",
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"vulnConfidentialityImpact": "NONE",
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"vulnIntegrityImpact": "HIGH",
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"vulnAvailabilityImpact": "NONE",
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"subConfidentialityImpact": "NONE",
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"subIntegrityImpact": "HIGH",
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"subAvailabilityImpact": "NONE",
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"baseScore": 8.9,
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"baseSeverity": "HIGH",
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"vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N",
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"version": "4.0"
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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/misskey-dev/misskey/security/advisories/GHSA-38jx-423m-g387",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/misskey-dev/misskey/security/advisories/GHSA-38jx-423m-g387"
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},
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{
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"name": "https://github.com/misskey-dev/misskey/releases/tag/2026.5.4",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/misskey-dev/misskey/releases/tag/2026.5.4"
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}
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],
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"affected": [
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{
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"vendor": "misskey-dev",
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"product": "misskey",
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"versions": [
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{
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"version": ">= 12.37.0, < 2026.5.4",
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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": "2026-08-03T21:56:40.198Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "Misskey is an open source, federated social media platform. Versions 12.37.0 and later, but prior to 2026.5.4, are vulnerable to timing attacks during JSON-LD signature validation and the compaction process. Because the JSON-LD parsing context is not shared between signature verification and subsequent processing, the application may trust information that should not be trusted, resulting in a time-of-check to time-of-use (TOCTOU) flaw. This allows an attacker to have fraudulent activities accepted as valid, leading to a loss of integrity. This issue has been fixed in version 2026.5.4."
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}
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],
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"source": {
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"advisory": "GHSA-38jx-423m-g387",
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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": "2026-08-04T14:11:08.087443Z",
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"id": "CVE-2026-47746",
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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": "no"
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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": "2026-08-04T14:11:19.206Z"
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}
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}
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]
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}
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} |