CVE-2026-123569
📛 CVE Title
Devalue before 5.6.3 Denial of Service via Sparse Array Serialization
Description
The devalue package for npm before 5.6.3 can consume excessive CPU and memory when serializing sparse arrays with uneval or stringify. An attacker who manages to get a sparse array created on the server, which mainstream wire formats do not allow, and serialized there can cause a denial of service.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- VulnCheck
- CVSS severity
- HIGH
- CVSS score
- 8.7 / 10
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N- Effective score
- 8.7 / 10 HIGH source: CNA overview
- CWE(s)
-
CWE-770 - Reserved
- 2026-11-06
- Published
- 2026-11-08 01:38 UTC
- Last updated
- 2026-11-08 01:38 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/123xxx/CVE-2026-123569.json
- Linked Threat
- CVE-2026-123569 — Devalue before 5.6.3 Denial of Service via Sparse Array Serialization
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2026-119454
EUVD enrichment is queued; refresh the page in a few seconds.
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| sveltejs | devalue |
0 (affected),
5.6.3 (unaffected)
|
— |
Vendor references (2)
References embedded in the original CVE record by the assigning CNA.
- GitHub Security Advisory (GHSA-33hq-fvwr-56pm) vendor-advisory
- VulnCheck Advisory: Devalue before 5.6.3 Denial of Service via Sparse Array Serialization third-party-advisory
MITRE references (2) cveawg.mitre.org
Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.
- GitHub Security Advisory (GHSA-33hq-fvwr-56pm) vendor-advisory
- VulnCheck Advisory: Devalue before 5.6.3 Denial of Service via Sparse Array Serialization third-party-advisory
Web references (0)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
No web references attached yet.
Remediations (10)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:blogs.oracle.com
For more information about the Critical Patch Update program, see the security vulnerability remediation practices page located on the Oracle Trust Center.
2026-11-08 10:24 UTC -
web:support.esri.com
The issues resolved by these patches are listed in the Issues addressed with this patch section below. As part of the patch installation, the ArcGIS Server service is stopped and restarted. The restart may take several minutes depending on the number of services published on the ArcGIS Server site. This patch can be uninstalled as outlined in the Uninstalling this patch on Windows and ...
2026-11-08 10:24 UTC -
web:support.esri.com
This patch deals specifically with the issues listed below under Issues Addressed with this Patch . As part of the patch installation, the Portal for ArcGIS service is stopped and restarted. The restart may take several minutes depending on the number of items on the enterprise deployment. As a best practice, clear the browser cache and re-launch the browser after installing the patch . This ...
2026-11-08 10:24 UTC -
web:support.sap.com
On 13 th of October 2026 , SAP security patch day saw the release of 16 new security notes and 4 GitHub security advisories. There are 2 updates to previously released security notes.
2026-11-08 10:24 UTC -
web:www.aikido.dev
CVE remediation is fixing known flaws in the software you run. Why upgrading often fails, what remediation actually involves, and how backporting fixes it.
2026-11-08 10:24 UTC -
web:www.fortra.com
Analyze Oracle's October 2026 Critical Patch Update, including 1,295 patches, critical vulnerabilities, affected products, and remediation guidance.
2026-11-08 10:24 UTC -
web:www.oracle.com
This Critical Patch Update contains 1448 new security patches across the product families listed below. Please note that a My Oracle Support (MOS) note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at July 2026 Critical Patch Update: Executive Summary and Analysis.
2026-11-08 10:24 UTC -
web:www.oracle.com
Prior Critical Patch Update and Critical Security Patch Update advisories should be reviewed for information regarding earlier published security patches. Refer to Critical Patch Updates, Critical Security Patch Updates, Security Alerts and Bulletins for information about Oracle Security advisories.
2026-11-08 10:24 UTC -
web:www.ptc.com
To stay informed, customers are urged to monitor security communications from [email protected] and regularly review the PTC Trust Center blog and eSupport Article (CS473270) for the latest updates, patch information, indicators of compromise (IOCs), remediation guidance, and other technical details.
2026-11-08 10:24 UTC -
web:www.thehackerwire.com
How do I fix or mitigate CVE-2026-123569 ? To protect against CVE-2026-123569 , you should: (1) Apply the latest security patches from the vendor, (2) Check official security advisories for specific remediation steps, (3) Update affected software to the latest version, and (4) Monitor your systems for any signs of exploitation.
2026-11-08 10:24 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2026-123569.json.
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"packageURL": "pkg:npm/devalue",
"product": "devalue",
"vendor": "sveltejs",
"versions": [
{
"lessThan": "5.6.3",
"status": "affected",
"version": "0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.6.3",
"versionType": "semver"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:svelte:devalue:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.6.3",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"credits": [
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}
],
"datePublic": "2026-02-18T00:00:00.000Z",
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}
],
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"version": "3.1"
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"problemTypes": [
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"description": "Allocation of Resources Without Limits or Throttling",
"lang": "en",
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"references": [
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"name": "GitHub Security Advisory (GHSA-33hq-fvwr-56pm)",
"tags": [
"vendor-advisory"
],
"url": "https://github.com/sveltejs/devalue/security/advisories/GHSA-33hq-fvwr-56pm"
},
{
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"tags": [
"third-party-advisory"
],
"url": "https://www.vulncheck.com/advisories/devalue-before-5.6.3-denial-of-service-via-sparse-array-serialization"
}
],
"title": "Devalue before 5.6.3 Denial of Service via Sparse Array Serialization",
"x_generator": {
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"cveMetadata": {
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"datePublished": "2026-11-08T01:38:07.240Z",
"dateReserved": "2026-11-06T00:53:14.312Z",
"dateUpdated": "2026-11-08T01:38:07.240Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
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