CVE-2026-72724

{"id": "CVE-2026-72724", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-72724", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-11T01:57:32.913192Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "impactScore": 1.4, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "discourse", "product": "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"}]}]}], "published": "2026-08-10T16:19:49.810", "references": [{"url": "https://github.com/discourse/discourse/commit/1276d7032af8803956c74ae87ccfd976938dcd75", "source": "security-advisories@github.com"}, {"url": "https://github.com/discourse/discourse/commit/45ab6d54076de9ca4965888974d4416d5b48e83c", "source": "security-advisories@github.com"}, {"url": "https://github.com/discourse/discourse/commit/49efe1d7f098f2ce7301908815a211cc9248270f", "source": "security-advisories@github.com"}, {"url": "https://github.com/discourse/discourse/commit/dc54846f0754799591717b6018343e49524e41ce", "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-8g98-fvfc-9w48", "source": "security-advisories@github.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-639"}]}], "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, plugins/chat/lib/chat/onebox_handler.rb resolves Chat::Thread by route thread_id independently of the route channel_id before checking whether the user can preview the selected chat channel. An authenticated user can pair a public channel ID with a private thread ID in a /onebox.json request and obtain private thread message content. This issue is fixed in versions 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0."}], "lastModified": "2026-09-08T20:54:37.790", "sourceIdentifier": "security-advisories@github.com"}