{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-35599", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-03T21:25:12.162Z", "datePublished": "2026-04-10T16:05:57.581Z", "dateUpdated": "2026-04-10T18:28:29.310Z"}, "containers": {"cna": {"title": "Vikunja has an Algorithmic Complexity DoS in Repeating Task Handler", "problemTypes": [{"descriptions": [{"cweId": "CWE-407", "lang": "en", "description": "CWE-407: Inefficient Algorithmic Complexity", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/go-vikunja/vikunja/security/advisories/GHSA-r4fg-73rc-hhh7", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/go-vikunja/vikunja/security/advisories/GHSA-r4fg-73rc-hhh7"}, {"name": "https://github.com/go-vikunja/vikunja/pull/2577", "tags": ["x_refsource_MISC"], "url": "https://github.com/go-vikunja/vikunja/pull/2577"}, {"name": "https://github.com/go-vikunja/vikunja/commit/6df0d6c8f54b01db6464c42810e40e55f12b481b", "tags": ["x_refsource_MISC"], "url": "https://github.com/go-vikunja/vikunja/commit/6df0d6c8f54b01db6464c42810e40e55f12b481b"}, {"name": "https://github.com/go-vikunja/vikunja/releases/tag/v2.3.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/go-vikunja/vikunja/releases/tag/v2.3.0"}], "affected": [{"vendor": "go-vikunja", "product": "vikunja", "versions": [{"version": "< 2.3.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-04-10T16:05:57.581Z"}, "descriptions": [{"lang": "en", "value": "Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, the addRepeatIntervalToTime function uses an O(n) loop that advances a date by the task's RepeatAfter duration until it exceeds the current time. By creating a repeating task with a 1-second interval and a due date far in the past, an attacker triggers billions of loop iterations, consuming CPU and holding a database connection for minutes per request. This vulnerability is fixed in 2.3.0."}], "source": {"advisory": "GHSA-r4fg-73rc-hhh7", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-04-10T18:27:47.907031Z", "id": "CVE-2026-35599", "options": [{"Exploitation": "poc"}, {"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": "2026-04-10T18:28:29.310Z"}}]}}

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{"cveTags": [], "descriptions": [{"lang": "en", "value": "Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, the addRepeatIntervalToTime function uses an O(n) loop that advances a date by the task's RepeatAfter duration until it exceeds the current time. By creating a repeating task with a 1-second interval and a due date far in the past, an attacker triggers billions of loop iterations, consuming CPU and holding a database connection for minutes per request. This vulnerability is fixed in 2.3.0."}], "id": "CVE-2026-35599", "lastModified": "2026-04-10T17:17:03.520", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-04-10T17:17:03.520", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/go-vikunja/vikunja/commit/6df0d6c8f54b01db6464c42810e40e55f12b481b"}, {"source": "security-advisories@github.com", "url": "https://github.com/go-vikunja/vikunja/pull/2577"}, {"source": "security-advisories@github.com", "url": "https://github.com/go-vikunja/vikunja/releases/tag/v2.3.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/go-vikunja/vikunja/security/advisories/GHSA-r4fg-73rc-hhh7"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-407"}], "source": "security-advisories@github.com", "type": "Primary"}]}

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