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vuln-cve/data/2026/86xxx/CVE-2026-86112.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-86112",
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"state": "PUBLISHED",
"assignerShortName": "VulnCheck",
"dateReserved": "2026-09-05T01:59:19.567Z",
"datePublished": "2026-09-05T09:59:04.004Z",
"dateUpdated": "2026-09-24T14:20:59.482Z"
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},
"datePublic": "2026-09-04T00:00:00.000Z",
"title": "BookWyrm through 0.9.1 Missing Authorization on the Favorite and Unfavorite Endpoints",
"descriptions": [
{
"lang": "en",
"value": "BookWyrm through 0.9.1 fails to validate user visibility permissions in the Favorite and Unfavorite views, allowing authenticated attackers to favorite or unfavorite followers-only and direct statuses they cannot access. Attackers can POST to the favorite endpoint with a status ID to create unauthorized interactions, trigger ActivityPub broadcasts, and enumerate private status IDs through response differentiation."
}
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"problemTypes": [
{
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{
"lang": "en",
"description": "Authorization Bypass Through User-Controlled Key",
"cweId": "CWE-639",
"type": "CWE"
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"affected": [
{
"vendor": "bookwyrm-social",
"product": "bookwyrm",
"repo": "https://github.com/bookwyrm-social/bookwyrm",
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"packageURL": "pkg:github/bookwyrm-social/bookwyrm",
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"version": "0",
"lessThanOrEqual": "0.9.1",
"status": "affected",
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"attackVector": "NETWORK",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"vulnConfidentialityImpact": "LOW",
"vulnIntegrityImpact": "LOW",
"vulnAvailabilityImpact": "NONE",
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"subIntegrityImpact": "NONE",
"subAvailabilityImpact": "NONE",
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"references": [
{
"url": "https://github.com/geo-chen/oss/blob/main/bookwyrm.md#finding-2-authenticated-idor-in-favoriteunfavorite-allows-interaction-with-private-statuses",
"tags": [
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"url": "https://github.com/bookwyrm-social/bookwyrm/blob/v0.9.1/bookwyrm/views/interaction.py",
"tags": [
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"name": "Favorite/Unfavorite fetch by id with no visibility check"
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"url": "https://github.com/bookwyrm-social/bookwyrm",
"tags": [
"product"
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"name": "VulnCheck Advisory: BookWyrm through 0.9.1 Missing Authorization on the Favorite and Unfavorite Endpoints",
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"url": "https://www.vulncheck.com/advisories/bookwyrm-through-0.9.1-missing-authorization-on-the-favorite-and-unfavorite-endpoints"
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"timestamp": "2026-09-10T14:19:13.810369Z",
"id": "CVE-2026-86112",
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"Exploitation": "none"
},
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"Automatable": "no"
},
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"Technical Impact": "partial"
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"version": "2.0.3"
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"title": "CISA ADP Vulnrichment",
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