{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-42570", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-28T17:26:12.084Z", "datePublished": "2026-06-09T16:12:26.377Z", "dateUpdated": "2026-06-09T18:06:56.030Z"}, "containers": {"cna": {"title": "Svelte devalue: DoS via sparse array deserialization", "problemTypes": [{"descriptions": [{"cweId": "CWE-770", "lang": "en", "description": "CWE-770: Allocation of Resources Without Limits or Throttling", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/sveltejs/devalue/security/advisories/GHSA-77vg-94rm-hx3p", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/sveltejs/devalue/security/advisories/GHSA-77vg-94rm-hx3p"}, {"name": "https://github.com/sveltejs/devalue/commit/206ca6712fbc380a4571c59de9ab04b91110792d", "tags": ["x_refsource_MISC"], "url": "https://github.com/sveltejs/devalue/commit/206ca6712fbc380a4571c59de9ab04b91110792d"}, {"name": "https://github.com/sveltejs/devalue/releases/tag/v5.8.1", "tags": ["x_refsource_MISC"], "url": "https://github.com/sveltejs/devalue/releases/tag/v5.8.1"}], "affected": [{"vendor": "sveltejs", "product": "devalue", "versions": [{"version": ">= 5.6.3, < 5.8.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-06-09T16:12:26.377Z"}, "descriptions": [{"lang": "en", "value": "Svelte devalue is a JavaScript library that serializes values into strings when JSON.stringify isn't sufficient for the job. From version 5.6.3 to before version 5.8.1, devalue.parse could, due to quirks in some JavaScript engines, be convinced to allocate much more memory than was needed when deserializing sparse arrays, leading to excessive memory consumption. This issue has been patched in version 5.8.1."}], "source": {"advisory": "GHSA-77vg-94rm-hx3p", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-06-09T18:06:15.435480Z", "id": "CVE-2026-42570", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"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": "2026-06-09T18:06:56.030Z"}}]}}

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-42570", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-28T17:26:12.084Z", "datePublished": "2026-06-09T16:12:26.377Z", "dateUpdated": "2026-06-09T18:06:56.030Z"}, "containers": {"cna": {"title": "Svelte devalue: DoS via sparse array deserialization", "problemTypes": [{"descriptions": [{"cweId": "CWE-770", "lang": "en", "description": "CWE-770: Allocation of Resources Without Limits or Throttling", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/sveltejs/devalue/security/advisories/GHSA-77vg-94rm-hx3p", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/sveltejs/devalue/security/advisories/GHSA-77vg-94rm-hx3p"}, {"name": "https://github.com/sveltejs/devalue/commit/206ca6712fbc380a4571c59de9ab04b91110792d", "tags": ["x_refsource_MISC"], "url": "https://github.com/sveltejs/devalue/commit/206ca6712fbc380a4571c59de9ab04b91110792d"}, {"name": "https://github.com/sveltejs/devalue/releases/tag/v5.8.1", "tags": ["x_refsource_MISC"], "url": "https://github.com/sveltejs/devalue/releases/tag/v5.8.1"}], "affected": [{"vendor": "sveltejs", "product": "devalue", "versions": [{"version": ">= 5.6.3, < 5.8.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-06-09T16:12:26.377Z"}, "descriptions": [{"lang": "en", "value": "Svelte devalue is a JavaScript library that serializes values into strings when JSON.stringify isn't sufficient for the job. From version 5.6.3 to before version 5.8.1, devalue.parse could, due to quirks in some JavaScript engines, be convinced to allocate much more memory than was needed when deserializing sparse arrays, leading to excessive memory consumption. This issue has been patched in version 5.8.1."}], "source": {"advisory": "GHSA-77vg-94rm-hx3p", "discovery": "UNKNOWN"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-42570", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-09T18:06:15.435480Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-09T18:06:42.643Z"}}]}}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:svelte:devalue:*:*:*:*:*:node.js:*:*", "matchCriteriaId": "D2127A9A-A72E-41DE-B82E-02CD15CD15E2", "versionEndExcluding": "5.8.1", "versionStartIncluding": "5.6.3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Svelte devalue is a JavaScript library that serializes values into strings when JSON.stringify isn't sufficient for the job. From version 5.6.3 to before version 5.8.1, devalue.parse could, due to quirks in some JavaScript engines, be convinced to allocate much more memory than was needed when deserializing sparse arrays, leading to excessive memory consumption. This issue has been patched in version 5.8.1."}], "id": "CVE-2026-42570", "lastModified": "2026-06-11T18:52:51.173", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "[email protected]", "type": "Secondary"}]}, "published": "2026-06-09T17:17:07.253", "references": [{"source": "[email protected]", "tags": ["Patch"], "url": "https://github.com/sveltejs/devalue/commit/206ca6712fbc380a4571c59de9ab04b91110792d"}, {"source": "[email protected]", "tags": ["Product", "Release Notes"], "url": "https://github.com/sveltejs/devalue/releases/tag/v5.8.1"}, {"source": "[email protected]", "tags": ["Vendor Advisory"], "url": "https://github.com/sveltejs/devalue/security/advisories/GHSA-77vg-94rm-hx3p"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-770"}], "source": "[email protected]", "type": "Primary"}]}

{"bugzilla": {"description": "devalue: devalue: Excessive memory consumption via deserialization of sparse arrays", "id": "2487050", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2487050"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-770", "details": ["Svelte devalue is a JavaScript library that serializes values into strings when JSON.stringify isn't sufficient for the job. From version 5.6.3 to before version 5.8.1, devalue.parse could, due to quirks in some JavaScript engines, be convinced to allocate much more memory than was needed when deserializing sparse arrays, leading to excessive memory consumption. This issue has been patched in version 5.8.1.", "A flaw was found in devalue, a JavaScript library used for serializing values. Due to quirks in some JavaScript engines, the `devalue.parse` function could be exploited by a remote attacker when deserializing specially crafted sparse arrays. This could lead to excessive memory consumption, resulting in a Denial of Service (DoS) for the affected system."], "name": "CVE-2026-42570", "package_state": [{"cpe": "cpe:/a:redhat:podman_desktop:1", "fix_state": "Under investigation", "package_name": "rh-podman-desktop.git", "product_name": "Red Hat Build of Podman Desktop"}, {"cpe": "cpe:/a:redhat:trusted_artifact_signer:1", "fix_state": "Under investigation", "package_name": "rhtas/rekor-search-ui-rhel9", "product_name": "Red Hat Trusted Artifact Signer"}], "public_date": "2026-06-09T16:12:26Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-42570\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-42570\nhttps://github.com/sveltejs/devalue/commit/206ca6712fbc380a4571c59de9ab04b91110792d\nhttps://github.com/sveltejs/devalue/releases/tag/v5.8.1\nhttps://github.com/sveltejs/devalue/security/advisories/GHSA-77vg-94rm-hx3p"], "threat_severity": "Important"}