CVE-2026-22775: Devalue Denial of Service Vulnerability

HIGH
Advisory Identifier: GHSA-g2pg-6438-jwpf
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CVSS 7.5
CWE-405
Published
Advisory Summary

CVE-2026-22775 is a HIGH (CVSS 7.5) denial of service vulnerability (CWE-405: Asymmetric Resource Consumption (Amplification)) affecting Devalue libraries in the npm ecosystem. The issue involves devalue vulnerable to denial of service due to memory/cpu exhaustion in devalue.parse. Remediation is available by upgrading affected packages to version 5.6.2.

CVE-2026-22775 at a Glance

CVE Identifier CVE-2026-22775
GHSA Identifier GHSA-g2pg-6438-jwpf
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-405: Asymmetric Resource Consumption (Amplification)
Affected Product Devalue
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2026-22775

To remediate this vulnerability, upgrade all affected Devalue dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

devalue fixed: 5.6.2 
npm install devalue@5.6.2
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls devalue

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-22775, inspect your project dependencies using npm:

npm ls devalue

Analyze the terminal output to locate any version of Devalue in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 5.6.2), your application is affected.

Note: The npm ls devalue command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-405: Asymmetric Resource Consumption (Amplification), where the product does not properly control situations in which an adversary can cause the product to consume or produce excessive resources without requiring the adversary to invest equivalent work or otherwise prove authorization, i.e., the adversary's influence is "asymmetric.". In Devalue, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

## Summary Certain inputs can cause `devalue.parse` to consume excessive CPU time and/or memory, potentially leading to denial of service in systems that parse input from untrusted sources. This affects applications using `devalue.parse` on externally-supplied data. The root cause is the `ArrayBuffer` hydration expecting base64 encoded strings as input, but not checking the assumption before decoding the input. ## Details The parser's `ArrayBuffer` hydration logic does not properly validate input before processing. Specially crafted inputs can cause disproportionate memory allocation or CPU usage on the receiving system. ## Impact This is a denial of service vulnerability affecting systems that use `devalue.parse` to handle data from potentially untrusted sources. Affected systems should upgrade to patched versions immediately.

CVE-2026-22775 Affected Devalue Versions

1 component(s)
Fixed Versions:
5.6.2
Product / Package Ecosystem Affected Versions Fixed Version
devalue
npm/devalue
npm
≥ 5.1.0
< 5.6.2
5.6.2

References

GitHub Advisory / Wiki ADVISORY
https://github.com/sveltejs/devalue/security/advisories/GHSA-g2pg-6438-jwpf
NVD — CVE-2026-22775 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-22775
Security Fix Commit FIX COMMIT
https://github.com/sveltejs/devalue/commit/11755849fa0634ae294a15ec0aef2f43efcad7c4
Devalue Source Repository REPOSITORY
https://github.com/sveltejs/devalue
Devalue Release RELEASE
https://github.com/sveltejs/devalue/releases/tag/v5.6.2

Frequently Asked Questions

What is CVE-2026-22775?
CVE-2026-22775 is a security vulnerability in Devalue involving devalue vulnerable to denial of service due to memory/CPU exhaustion in devalue.parse under CWE-405: Asymmetric Resource Consumption (Amplification).
Which Devalue versions are affected?
Affected versions include releases prior to 5.6.2 across affected packages: devalue.
What version fixes CVE-2026-22775?
Upgrading to 5.6.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is devalue affected?
Yes, devalue is affected in releases prior to 5.6.2. Upgrade your dependency to 5.6.2 or later.
What is the CVSS score of CVE-2026-22775?
CVE-2026-22775 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-22775?
CVE-2026-22775 is classified under CWE-405: Asymmetric Resource Consumption (Amplification) (The product does not properly control situations in which an adversary can cause the product to consume or produce excessive resources without requiring the adversary to invest equivalent work or otherwise prove authorization, i.e., the adversary's influence is "asymmetric.").
How can I check npm dependencies for CVE-2026-22775?
Run the dependency tree command: 'npm ls devalue'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-g2pg-6438-jwpf",
  "modified" : "2026-01-15T22:15:18Z",
  "published" : "2026-01-15T22:15:18Z",
  "aliases" : [ "CVE-2026-22775" ],
  "summary" : "devalue vulnerable to denial of service due to memory/CPU exhaustion in devalue.parse",
  "details" : "## Summary\n\nCertain inputs can cause `devalue.parse` to consume excessive CPU time and/or memory, potentially leading to denial of service in systems that parse input from untrusted sources. This affects applications using `devalue.parse` on externally-supplied data. The root cause is the `ArrayBuffer` hydration expecting base64 encoded strings as input, but not checking the assumption before decoding the input.\n\n## Details\n\nThe parser's `ArrayBuffer` hydration logic does not properly validate input before processing. Specially crafted inputs can cause disproportionate memory allocation or CPU usage on the receiving system.\n\n## Impact\n\nThis is a denial of service vulnerability affecting systems that use `devalue.parse` to handle data from potentially untrusted sources.\n\nAffected systems should upgrade to patched versions immediately.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "devalue"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "5.1.0"
      }, {
        "fixed" : "5.6.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/sveltejs/devalue/security/advisories/GHSA-g2pg-6438-jwpf"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-22775"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/sveltejs/devalue/commit/11755849fa0634ae294a15ec0aef2f43efcad7c4"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/sveltejs/devalue"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/sveltejs/devalue/releases/tag/v5.6.2"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-405" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-01-15T22:15:18Z",
    "nvd_published_at" : "2026-01-15T19:16:05Z"
  }
}