Skip to main content

Node.js EUVDEUVD-2026-39609

| CVE-2026-48933 HIGH
Integer Overflow or Wraparound (CWE-190)
2026-06-18 GHSA-pvpp-9x2p-fxg3
Information Disclosure Node.js Integer Overflow Node Js
7.5
CVSS 3.1 · Vendor
View

Attack ChainAIDerived

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

  1. Access
    Reach app endpoint using WebCrypto
  2. Exploit
    Submit oversized/crafted cipher input
  3. Execution
    Trigger integer overflow in output-length calc
  4. Impact
    Process abort / denial of service

Vulnerability Assessment

Weakness
CWE
CWE-190
ASVS 5.0
V15 - Secure Coding and Architecture Integer overflow checks
MITRE ATT&CK

1 technique across 1 tactic: Execution

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Sign in to read
Exploitation Conditions

Exploitation requires the target application to invoke the WebCrypto / SubtleCrypto cipher API (subtle.encrypt or subtle.decrypt) on input whose size is influenced by the attacker; the integer overflow is in the cipher output-length computation, so an attacker must be able to supply or trigger an operation with a sufficiently large/crafted length. Limiting factors: applications that never expose WebCrypto operations to untrusted input, or that hard-cap input sizes, are not realistically exploitable despite the network CVSS vector; impact is confined to denial of service (process crash) with no confidentiality or integrity effect per the vector. Affected only on Node.js 26.x before 26.3.1.
Impact

The CVSS 3.0 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H, base 7.5) describes a network-reachable, low-complexity, unauthenticated condition whose sole impact is availability - consistent with a crash/abort rather than data exposure or code execution. Note a conflict in the intelligence: the vendor tags list both 'Information Disclosure' and 'Integer Overflow', yet the CVSS sets C:N and I:N, so the practical impact per the score is denial of service only; the 'Information Disclosure' tag is likely a generic batch label for this multi-CVE release and is not substantiated by the vector. No EPSS score was provided, the issue is not in CISA KEV, and no POC is referenced, so real-world risk is currently theoretical and gated by whether an application actually feeds attacker-controlled sizes into WebCrypto. Net: a legitimately High-severity DoS for exposed crypto endpoints, but absent KEV/EPSS/POC signals it is a patch-on-normal-cycle item rather than an emergency for most deployments.
Exploit ScenarioDerived

An attacker sends a request to an application endpoint that performs a WebCrypto encrypt or decrypt on attacker-controlled data of an attacker-chosen size; the unguarded output-length calculation overflows and the Node.js process aborts, taking the service offline. Given AV:N/AC:L/PR:N/UI:N, this requires no authentication or user interaction where such an endpoint is reachable. No public POC is referenced.
This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 0.6% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAIv1 – Jun 26, 2026

Denial of service in Node.js 26.x (fixed in 26.3.1) arises from an unguarded integer overflow when computing WebCrypto cipher output buffer lengths, allowing remote attackers to crash a process that performs SubtleCrypto encrypt/decrypt operations on attacker-influenced data. Rated High by the Node.js project (CVSS 7.5, availability-only impact). No public exploit identified at time of analysis, and it is not listed in CISA KEV.

RemediationAI

Vendor-released patch: Node.js 26.3.1 - upgrade from 26.x to 26.3.1 (or the corresponding patched build on your release line as listed in the Node.js June 2026 security release advisory at https://nodejs.org/en/blog/vulnerability/june-2026-security-releases). Release notes: https://github.com/nodejs/node/releases/tag/v26.3.1 (fix commit 98fbc89211). If immediate upgrade is not possible, the practical compensating control is to avoid passing untrusted or unbounded input lengths into crypto.subtle.encrypt/decrypt - validate and cap the size of any externally-supplied ciphertext/plaintext before handing it to WebCrypto, or route such operations through Node's classic crypto module where appropriate; the trade-off is added input-validation code and possible API changes in your application. Restricting or rate-limiting endpoints that expose WebCrypto operations to untrusted callers reduces crash exposure but does not eliminate the underlying overflow.

Affected VersionsENISA

Node 26.3.0 ≤26.3.0
Node 24.16.0 ≤24.16.0
Node 22.22.3 ≤22.22.3

Affected Packages

euvd node no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

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

Sign in to check
Technical ContextAI · show details

The flaw lives in Node.js's WebCrypto (Web Crypto API / SubtleCrypto) implementation, the standards-based cryptographic interface exposed through globalThis.crypto.subtle. The root cause is CWE-190 (Integer Overflow or Wraparound): the code computing the output length for a cipher operation was not properly bounds-checked, so a large or crafted input size can cause the length calculation to wrap around. The fix commit (98fbc89211, 'crypto: guard WebCrypto cipher output length', by Filip Skokan) adds an explicit guard on that computed length. Because this is the runtime's own crypto layer rather than a third-party library, any application calling subtle.encrypt/decrypt with externally-controlled buffer sizes inherits the exposure.

Know when Node.js gets its next vulnerability

  • Watch products and get an email when something new is published
  • Check this CVE against your own stack and servers
  • Exploit and PoC references, threat intelligence from 22 sources
Continue with Google Continue with GitHub

No credit card · 7-day full trial

Severity by source

Vendor (CNA) PRIMARY 7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
vuln.today AI 7.5 HIGH

Network-reachable WebCrypto operation, no auth or interaction (PR:N/UI:N/AC:L); integer overflow yields a process crash, so availability-only (A:H, C:N/I:N).

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SUSE HIGH
Red Hat 7.5 HIGH

Primary rating from Vendor (CNA).

CVSS VectorVendor

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

3
CVSS changed
Jun 26, 2026 - 02:22 NVD
7.5 (HIGH)
CVE Published
Jun 18, 2026 - 04:37 github-releases
UNKNOWN (no severity yet)
CVE Published
Jun 18, 2026 - 04:37 github-releases
HIGH 7.5

Description PRE-NVD

Disclosed via GitHub release of nodejs/node. NVD scoring and full description are pending.

Executive ViewAI

Why It Matters

Organizations running Node.js 26.x face availability risk from CVE-2026-48933, a denial of service vulnerability triggered by remote requests to WebCrypto encryption operations that can crash affected processes. Vendor has released a patch (version 26.3.1), and immediate deployment is necessary to prevent potential production outages in any application performing cryptographic operations. This vulnerability affects the core operational stability of Node.js-based services but does not compromise data confidentiality or integrity.

Business Impact: High
Compensating Controls

Apply vendor patch.

Threat Intelligence Overview

EPSS Score
0.6%
Top 57% exploitable
Prevalence
Ubiquitous
Node.js is a core runtime across most modern web and backend stacks
Data Quality
7 sources
Confidence: High
EUVD 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 0.6%
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

39
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +38
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Integer Overflow MEDIUM

Integer overflow occurs when an arithmetic operation produces a result that exceeds the maximum value a given integer type can store.

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

More in Node.js

View all
CVE-2025-68613 HIGH POC
8.8 Dec 19

Remote code execution in n8n's workflow expression evaluation system allows an authenticated user with workflow creation
CVE-2024-41713 CRITICAL POC
9.1 Oct 21

A vulnerability in the NuPoint Unified Messaging (NPM) component of Mitel MiCollab through 9.8 SP1 FP2 (9.8.1.201) could
CVE-2024-55591 CRITICAL POC
9.8 Jan 14

FortiOS and FortiProxy contain an authentication bypass via the Node.js websocket module allowing unauthenticated remote
CVE-2023-44487 HIGH POC
7.5 Oct 10

Denial of service against HTTP/2 server implementations allows remote unauthenticated attackers to exhaust server resour
CVE-2014-7205 CRITICAL POC
10.0 Oct 08

Eval injection vulnerability in the internals.batch function in lib/batch.js in the bassmaster plugin before 1.5.2 for t
CVE-2025-59528 CRITICAL POC
10.0 Sep 22

Flowise version 3.0.5 contains a remote code execution vulnerability in the CustomMCP node. The mcpServerConfig paramete
CVE-2017-14849 HIGH POC
7.5 Sep 28

Node.js 8.5.0 before 8.6.0 allows remote attackers to access unintended files, because a change to ".." handling was inc
CVE-2017-5941 CRITICAL POC
9.8 Feb 09

An issue was discovered in the node-serialize package 0.0.4 for Node.js. Rated critical severity (CVSS 9.8), this vulner
CVE-2014-0224 HIGH POC
7.4 Jun 05

OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before 1.0.1h does not properly restrict processing of ChangeCiph
CVE-2014-3744 HIGH POC
7.5 Oct 23

Directory traversal vulnerability in the st module before 0.2.5 for Node.js allows remote attackers to read arbitrary fi
CVE-2014-9566 HIGH POC
7.5 Mar 10

Multiple SQL injection vulnerabilities in the Manage Accounts page in the AccountManagement.asmx service in the Solarwin
CVE-2013-4660 MEDIUM POC
6.8 Jun 28

The JS-YAML module before 2.0.5 for Node.js parses input without properly considering the unsafe !!js/function tag, whic

Same weakness CWE-190 – Integer Overflow or Wraparound

View all
CVE-2013-2729 CRITICAL POC
9.8
CVE-2015-8651 HIGH
8.8
CVE-2012-5054 HIGH POC
8.8
CVE-2014-0569 CRITICAL POC
9.3
CVE-2023-21716 CRITICAL POC
9.8
CVE-2017-3599 HIGH POC
7.5
CVE-2017-7529 HIGH
7.5
CVE-2016-1010 HIGH
8.8

Same technique Information Disclosure

View all
CVE-2019-2725 CRITICAL POC
9.8
CVE-2021-34523 CRITICAL POC
9.0
CVE-2013-2251 CRITICAL POC
9.8
CVE-2017-5638 CRITICAL POC
9.8
CVE-2025-24813 CRITICAL POC
9.8
CVE-2015-1701 HIGH POC
7.8
CVE-2017-0147 HIGH POC
7.5

Vendor StatusVendor

SUSE

Severity: Important
Product Status
SUSE Linux Enterprise High Performance Computing 15 SP7 SUSE Linux Enterprise Module for Web and Scripting 15 SP7 SUSE Linux Enterprise Server 15 SP7 SUSE Linux Enterprise Server for SAP Applications 15 SP7 Fixed
SUSE Linux Enterprise Server 15 SP6-LTSS Fixed
SUSE Linux Enterprise Server for SAP Applications 15 SP6 Fixed
openSUSE Tumbleweed Fixed
SUSE Linux Enterprise Module for Web and Scripting 15 SP7 Affected

References

Advisories & patches
ADVISORY https://access.redhat.com/errata/RHSA-2026:28727 ADVISORY https://access.redhat.com/errata/RHSA-2026:29012 ADVISORY https://access.redhat.com/errata/RHSA-2026:30172 ADVISORY https://access.redhat.com/errata/RHSA-2026:7378 ADVISORY https://access.redhat.com/errata/RHSA-2026:9455 ADVISORY https://github.com/nodejs/node/releases/tag/v26.3.1 ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-48933 ADVISORY https://seclists.org/oss-sec/2026/q2/984 ADVISORY https://vuldb.com/vuln/374102 ADVISORY https://www.herodevs.com/vulnerability-directory/cve-2026-48933 ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:2633/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:2647/ REF https://access.redhat.com/errata/RHSA-2026:35841 REF https://access.redhat.com/errata/RHSA-2026:35842 REF https://access.redhat.com/errata/RHSA-2026:35891 REF https://access.redhat.com/errata/RHSA-2026:35892 REF https://access.redhat.com/errata/RHSA-2026:39246 REF https://access.redhat.com/errata/RHSA-2026:39868 REF https://access.redhat.com/errata/RHSA-2026:41947 REF https://access.redhat.com/errata/RHSA-2026:52399 REF https://access.redhat.com/security/cve/CVE-2026-48933 REF https://bugzilla.redhat.com/show_bug.cgi?id=2493331 REF https://nodejs.org/en/blog/vulnerability/june-2026-security-releases REF https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48933.json

Search Externally

GitHub PoC Exploit-DB PacketStorm Snyk Rapid7 Nuclei Templates Trickest PoC
Back

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy