CVE-2026-72722

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-72722", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-08-10T13:48:09.545Z", "datePublished": "2026-08-10T15:54:35.907Z", "dateUpdated": "2026-08-13T17:46:27.779Z"}, "containers": {"cna": {"title": "Discourse: Duplicate lookup reveals restricted topic titles through canonicalized URLs", "problemTypes": [{"descriptions": [{"cweId": "CWE-862", "lang": "en", "description": "CWE-862: Missing Authorization", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/discourse/discourse/security/advisories/GHSA-4fx9-5m29-83p4", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/discourse/discourse/security/advisories/GHSA-4fx9-5m29-83p4"}, {"name": "https://github.com/discourse/discourse/pull/42091", "tags": ["x_refsource_MISC"], "url": "https://github.com/discourse/discourse/pull/42091"}, {"name": "https://github.com/discourse/discourse/pull/42092", "tags": ["x_refsource_MISC"], "url": "https://github.com/discourse/discourse/pull/42092"}, {"name": "https://github.com/discourse/discourse/pull/42093", "tags": ["x_refsource_MISC"], "url": "https://github.com/discourse/discourse/pull/42093"}, {"name": "https://github.com/discourse/discourse/pull/42094", "tags": ["x_refsource_MISC"], "url": "https://github.com/discourse/discourse/pull/42094"}, {"name": "https://github.com/discourse/discourse/commit/45abd925e46e8be40d2d047bced26628f26e4e31", "tags": ["x_refsource_MISC"], "url": "https://github.com/discourse/discourse/commit/45abd925e46e8be40d2d047bced26628f26e4e31"}, {"name": "https://github.com/discourse/discourse/commit/7d7ce546ac86e24a6512b321ace69fc52fe37bf4", "tags": ["x_refsource_MISC"], "url": "https://github.com/discourse/discourse/commit/7d7ce546ac86e24a6512b321ace69fc52fe37bf4"}, {"name": "https://github.com/discourse/discourse/commit/836a251d54a1004fb1c463a7d299b933b176191f", "tags": ["x_refsource_MISC"], "url": "https://github.com/discourse/discourse/commit/836a251d54a1004fb1c463a7d299b933b176191f"}, {"name": "https://github.com/discourse/discourse/commit/e54ba27eacee0f14f315e510e287e7ac2e4bdb1a", "tags": ["x_refsource_MISC"], "url": "https://github.com/discourse/discourse/commit/e54ba27eacee0f14f315e510e287e7ac2e4bdb1a"}], "affected": [{"vendor": "discourse", "product": "discourse", "versions": [{"version": "< 2026.1.6", "status": "affected"}, {"version": ">= 2026.5.0-latest, < 2026.5.2", "status": "affected"}, {"version": ">= 2026.6.0-latest, < 2026.6.1", "status": "affected"}, {"version": ">= 2026.7.0-latest, < 2026.7.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-08-10T15:54:35.907Z"}, "descriptions": [{"lang": "en", "value": "Discourse is an open-source discussion platform. Prior to 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0, TopicLink.extract_from, TopicLink.ensure_entry_for, and TopicLink.duplicate_lookup do not consistently enforce Guardian.can_see? checks when processing internal links. An authenticated user can submit links to restricted topics, private messages, or hidden posts and receive canonicalized slugs or titles in the composer_messages duplicate_lookup response even though the targets are not visible to that user. This issue is fixed in versions 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0."}], "source": {"advisory": "GHSA-4fx9-5m29-83p4", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-08-13T17:46:20.910196Z", "id": "CVE-2026-72722", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"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": "2026-08-13T17:46:27.779Z"}}]}}

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-72722", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-08-10T13:48:09.545Z", "datePublished": "2026-08-10T15:54:35.907Z", "dateUpdated": "2026-08-13T17:46:27.779Z"}, "containers": {"cna": {"title": "Discourse: Duplicate lookup reveals restricted topic titles through canonicalized URLs", "problemTypes": [{"descriptions": [{"cweId": "CWE-862", "lang": "en", "description": "CWE-862: Missing Authorization", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/discourse/discourse/security/advisories/GHSA-4fx9-5m29-83p4", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/discourse/discourse/security/advisories/GHSA-4fx9-5m29-83p4"}, {"name": "https://github.com/discourse/discourse/pull/42091", "tags": ["x_refsource_MISC"], "url": "https://github.com/discourse/discourse/pull/42091"}, {"name": "https://github.com/discourse/discourse/pull/42092", "tags": ["x_refsource_MISC"], "url": "https://github.com/discourse/discourse/pull/42092"}, {"name": "https://github.com/discourse/discourse/pull/42093", "tags": ["x_refsource_MISC"], "url": "https://github.com/discourse/discourse/pull/42093"}, {"name": "https://github.com/discourse/discourse/pull/42094", "tags": ["x_refsource_MISC"], "url": "https://github.com/discourse/discourse/pull/42094"}, {"name": "https://github.com/discourse/discourse/commit/45abd925e46e8be40d2d047bced26628f26e4e31", "tags": ["x_refsource_MISC"], "url": "https://github.com/discourse/discourse/commit/45abd925e46e8be40d2d047bced26628f26e4e31"}, {"name": "https://github.com/discourse/discourse/commit/7d7ce546ac86e24a6512b321ace69fc52fe37bf4", "tags": ["x_refsource_MISC"], "url": "https://github.com/discourse/discourse/commit/7d7ce546ac86e24a6512b321ace69fc52fe37bf4"}, {"name": "https://github.com/discourse/discourse/commit/836a251d54a1004fb1c463a7d299b933b176191f", "tags": ["x_refsource_MISC"], "url": "https://github.com/discourse/discourse/commit/836a251d54a1004fb1c463a7d299b933b176191f"}, {"name": "https://github.com/discourse/discourse/commit/e54ba27eacee0f14f315e510e287e7ac2e4bdb1a", "tags": ["x_refsource_MISC"], "url": "https://github.com/discourse/discourse/commit/e54ba27eacee0f14f315e510e287e7ac2e4bdb1a"}], "affected": [{"vendor": "discourse", "product": "discourse", "versions": [{"version": "< 2026.1.6", "status": "affected"}, {"version": ">= 2026.5.0-latest, < 2026.5.2", "status": "affected"}, {"version": ">= 2026.6.0-latest, < 2026.6.1", "status": "affected"}, {"version": ">= 2026.7.0-latest, < 2026.7.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-08-10T15:54:35.907Z"}, "descriptions": [{"lang": "en", "value": "Discourse is an open-source discussion platform. Prior to 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0, TopicLink.extract_from, TopicLink.ensure_entry_for, and TopicLink.duplicate_lookup do not consistently enforce Guardian.can_see? checks when processing internal links. An authenticated user can submit links to restricted topics, private messages, or hidden posts and receive canonicalized slugs or titles in the composer_messages duplicate_lookup response even though the targets are not visible to that user. This issue is fixed in versions 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0."}], "source": {"advisory": "GHSA-4fx9-5m29-83p4", "discovery": "UNKNOWN"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-72722", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-13T17:46:20.910196Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-13T17:46:24.402Z"}}]}}

{"affected": [{"affectedData": [{"product": "discourse", "vendor": "discourse", "versions": [{"status": "affected", "version": "< 2026.1.6"}, {"status": "affected", "version": ">= 2026.5.0-latest, < 2026.5.2"}, {"status": "affected", "version": ">= 2026.6.0-latest, < 2026.6.1"}, {"status": "affected", "version": ">= 2026.7.0-latest, < 2026.7.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Discourse is an open-source discussion platform. Prior to 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0, TopicLink.extract_from, TopicLink.ensure_entry_for, and TopicLink.duplicate_lookup do not consistently enforce Guardian.can_see? checks when processing internal links. An authenticated user can submit links to restricted topics, private messages, or hidden posts and receive canonicalized slugs or titles in the composer_messages duplicate_lookup response even though the targets are not visible to that user. This issue is fixed in versions 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0."}], "id": "CVE-2026-72722", "lastModified": "2026-09-08T20:54:37.790", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-72722", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-13T17:46:20.910196Z", "version": "2.0.3"}}]}, "published": "2026-08-10T16:19:49.520", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/discourse/discourse/commit/45abd925e46e8be40d2d047bced26628f26e4e31"}, {"source": "security-advisories@github.com", "url": "https://github.com/discourse/discourse/commit/7d7ce546ac86e24a6512b321ace69fc52fe37bf4"}, {"source": "security-advisories@github.com", "url": "https://github.com/discourse/discourse/commit/836a251d54a1004fb1c463a7d299b933b176191f"}, {"source": "security-advisories@github.com", "url": "https://github.com/discourse/discourse/commit/e54ba27eacee0f14f315e510e287e7ac2e4bdb1a"}, {"source": "security-advisories@github.com", "url": "https://github.com/discourse/discourse/pull/42091"}, {"source": "security-advisories@github.com", "url": "https://github.com/discourse/discourse/pull/42092"}, {"source": "security-advisories@github.com", "url": "https://github.com/discourse/discourse/pull/42093"}, {"source": "security-advisories@github.com", "url": "https://github.com/discourse/discourse/pull/42094"}, {"source": "security-advisories@github.com", "url": "https://github.com/discourse/discourse/security/advisories/GHSA-4fx9-5m29-83p4"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-862"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2026.1.6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2026.5.0-latest,2026.5.2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2026.6.0-latest,2026.6.1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2026.7.0-latest,2026.7.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "discourse", "source": "cna", "vendor": "discourse"}, "product": "discourse", "vendor": "discourse"}], "created": "2026-08-10T18:45:17.007431+00:00", "updated": "2026-08-11T04:00:07.449679+00:00", "vendors": ["discourse", "discourse$PRODUCT$discourse"]}