What is the CVSS score of CVE-2026-22775?

CVE-2026-22775 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.0%.

How to fix or mitigate CVE-2026-22775?

Within 7 days: Identify all affected systems and apply vendor patches promptly. Vendor patch is available.

Svelte CVE-2026-22775

HIGH

Asymmetric Resource Consumption (Amplification) (CWE-405)

2026-01-15 security-advisories@github.com

GHSA-g2pg-6438-jwpf

Denial Of Service Devalue Svelte

7.5

CVSS 3.1 · Vendor: github

View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

Access

Send malformed serialized data to devalue.parse
Exploit

Parser attempts base64 decode on non-base64 ArrayBuffer input
Execution

Excessive CPU/memory consumption
Impact

Denial of service

Vulnerability Assessment

Weakness	CWE CWE-405 OWASP Top 10:2025 A06:2021 - Vulnerable and Outdated Components ASVS 5.0 V2 - Validation and Business Logic Asymmetric resource consumption control
Exploitation Conditions	Application must call devalue.parse() on untrusted, externally-supplied data. Requires devalue versions 5.1.0 through 5.6.1. No authentication or special configuration required.
Impact	CVSS 7.5 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: None. User interaction: None.
Exploit ScenarioDerived	An attacker could exploit this flaw, denial of service in systems that parse input from untrusted.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

Patch available 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Denial of service in Svelte devalue library versions 5.1.0 through 5.6.1 allows remote attackers to exhaust CPU and memory resources by supplying malformed input to the parse function, affecting applications that process untrusted serialized data. The vulnerability stems from insufficient validation of ArrayBuffer inputs during deserialization. Applications should upgrade to version 5.6.2 or later.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 21:54 CVSS 7.5

Svelte devalue is a JavaScript library that serializes values into strings when JSON.stringify isn't sufficient for the job. [CVSS 7.5 HIGH]

RemediationAI

A vendor patch is available — apply it immediately. Fixed in version 5.6.2.. Restrict network access to the affected service where possible.

Affected Packages

npm devalue fix: 5.6.2

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in npm

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Affects Devalue. Svelte devalue is a JavaScript library that serializes values into strings when JSON.stringify isn't sufficient for the job. From 5.1.0 to 5.6.1, 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 checkin

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (github) PRIMARY 7.5 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SUSE HIGH

Red Hat 7.5 HIGH

Primary rating from Vendor (github).

CVSS VectorVendor: github

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Patch released

Jan 20, 2026 - 15:29 nvd

Patch available

CVE Published

Jan 15, 2026 - 19:16 nvd

HIGH 7.5

DescriptionCVE.org

Svelte devalue is a JavaScript library that serializes values into strings when JSON.stringify isn't sufficient for the job. From 5.1.0 to 5.6.1, 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. This vulnerability is fixed in 5.6.2.

Executive ViewAI

Why It Matters

Organizations using Svelte devalue face notable risk from CVE-2026-22775 rated CVSS 7.5. Exploitation could compromise the security of affected deployments. A patch is available and should be applied as part of regular vulnerability management.

Business Impact: High

Compensating Controls

Apply vendor patch. If immediate patching is not feasible: (1) Implement network-level access controls to limit exposure; (2) Enable enhanced monitoring and alerting; (3) Apply principle of least privilege.

Threat Intelligence Overview

EPSS Score

0.0%

Top 96% exploitable

Data Quality

6 sources

Confidence: High

NVD

CVE.org

EPSS Vendor

GitHub

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC No

EPSS 0.0%

Patch available Yes

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact

High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +38

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Denial of Service MEDIUM

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

Affected Products (CPE)CVE.org

cpe:2.3:a:svelte:devalue:*:*:*:*:*:node.js:*:*

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Vendor StatusVendor

SUSE

Severity: High

Product	Status
SUSE Linux Enterprise Desktop 15 SP7	Fixed
SUSE Linux Enterprise High Performance Computing 15 SP7	Fixed
SUSE Linux Enterprise Module for Python 3 15 SP7	Fixed
SUSE Linux Enterprise Server 15 SP7	Fixed
SUSE Linux Enterprise Server for SAP Applications 15 SP7	Fixed

References

Advisories & patches

PATCH https://github.com/sveltejs/devalue/commit/11755849fa0634ae294a15ec0aef2f43efcad7c4 ADVISORY https://access.redhat.com/errata/RHSA-2026:2144 ADVISORY https://access.redhat.com/errata/RHSA-2026:2926 ADVISORY https://github.com/sveltejs/devalue/security/advisories/GHSA-g2pg-6438-jwpf ADVISORY https://vuldb.com/vuln/341389 REF https://access.redhat.com/security/cve/CVE-2026-22775 REF https://bugzilla.redhat.com/show_bug.cgi?id=2430109 REF https://github.com/sveltejs/devalue/releases/tag/v5.6.2 REF https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-22775.json

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