CVE-2025-68934

{"id": "CVE-2025-68934", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-68934", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-01-28T19:46:05.140072Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "discourse", "product": "discourse", "versions": [{"status": "affected", "version": "< 3.5.4"}, {"status": "affected", "version": ">= 2025.11.0-latest, < 2025.11.2"}, {"status": "affected", "version": ">= 2025.12.0-latest, 2025.12.1"}, {"status": "affected", "version": ">= 2026.1.0-latest, < 2026.1.0"}]}]}], "published": "2026-01-28T20:16:12.627", "references": [{"url": "https://github.com/discourse/discourse/security/advisories/GHSA-vwjh-vrx9-9849", "tags": ["Mitigation", "Third Party Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-770"}]}], "descriptions": [{"lang": "en", "value": "Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, authenticated users can submit crafted payloads to /drafts.json that cause O(n^2) processing in Base62.decode, tying up workers for 35-60 seconds per request. This affects all users as the shared worker pool becomes exhausted. This issue is patched in versions 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0. Lowering the max_draft_length site setting reduces attack surface but does not fully mitigate the issue, as payloads under the limit can still trigger the slow code path."}, {"lang": "es", "value": "Discourse es una plataforma de discusi\u00f3n de c\u00f3digo abierto. En versiones anteriores a 3.5.4, 2025.11.2, 2025.12.1 y 2026.1.0, los usuarios autenticados pueden enviar cargas \u00fatiles elaboradas a /drafts.json que causan un procesamiento O(n^2) en Base62.decode, ocupando los workers durante 35-60 segundos por solicitud. Esto afecta a todos los usuarios ya que el grupo de workers compartido se agota. Este problema est\u00e1 parcheado en las versiones 3.5.4, 2025.11.2, 2025.12.1 y 2026.1.0. Reducir la configuraci\u00f3n del sitio max_draft_length reduce la superficie de ataque, pero no mitiga completamente el problema, ya que las cargas \u00fatiles por debajo del l\u00edmite a\u00fan pueden activar la ruta de c\u00f3digo lenta."}], "lastModified": "2026-06-17T09:59:51.030", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:discourse:discourse:*:*:*:*:stable:*:*:*", "vulnerable": true, "matchCriteriaId": "FDBF21E2-1191-4020-A17A-0702DE4E6451", "versionEndExcluding": "3.5.4"}, {"criteria": "cpe:2.3:a:discourse:discourse:*:*:*:*:stable:*:*:*", "vulnerable": true, "matchCriteriaId": "539B5B85-44F0-408E-B994-08BB20EA9C26", "versionEndExcluding": "2025.11.2", "versionStartIncluding": "2025.11.0"}, {"criteria": "cpe:2.3:a:discourse:discourse:2025.12.0:*:*:*:stable:*:*:*", "vulnerable": true, "matchCriteriaId": "CCBF47A8-0D3F-4174-8084-CD3517BF272A"}, {"criteria": "cpe:2.3:a:discourse:discourse:2026.1.0:*:*:*:stable:*:*:*", "vulnerable": true, "matchCriteriaId": "F6CF5F98-F08F-4B28-BBE2-8296760A547E"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}