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Node.js EUVDEUVD-2026-39612

| CVE-2026-48934 MEDIUM
Improper Certificate Validation (CWE-295)
4.3
CVSS 3.0 · Vendor
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Severity by source

Vendor (CNA) PRIMARY
4.3 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
vuln.today AI
3.1 LOW

AC:H reflects that exploitation requires active session reuse across multiple hosts; C:L only, as no integrity or availability impact is described.

3.1 AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
4.0 AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
SUSE
6.5 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Red Hat
4.3 MEDIUM
qualitative

Primary rating from Vendor (CNA).

CVSS VectorVendor

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

Lifecycle Timeline

4
Source Code Evidence Fetched
Jun 26, 2026 - 02:25 vuln.today
Analysis Generated
Jun 26, 2026 - 02:25 vuln.today
CVSS changed
Jun 26, 2026 - 02:22 NVD
4.3 (MEDIUM)
CVE Published
Jun 18, 2026 - 04:37 github-releases
UNKNOWN (no severity yet)

Description PRE-NVD

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

AnalysisAI

TLS session resumption in Node.js fails to bind reusable sessions to the originally authenticated host, enabling an information disclosure pathway. Affected versions are Node.js 26.x prior to 26.3.1 (Current channel), as disclosed in the June 2026 security release. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Attacker gains low-privilege network position
Delivery
Client connects to legitimate TLS host, session cached without host binding
Exploit
Attacker steers client to connect to attacker-controlled host
Execution
Node.js resumes prior session without re-authenticating hostname
Impact
Attacker receives data intended for original authenticated host

Vulnerability AssessmentAI

Exploitation Exploitation requires Node.js 26.x prior to 26.3.1 to be running as a TLS client that connects to multiple distinct hostnames and that session resumption is active (the default). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS base score of 4.3 (Medium) accurately reflects the limited impact: only confidentiality is affected (C:L), and no integrity or availability consequences are indicated. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker with low-level access-such as an insider or a service operating within the same network namespace-causes a Node.js client application that connects to multiple HTTPS endpoints to reuse a TLS session originally authenticated against a trusted server (e.g., internal-api.example.com) when subsequently connecting to a different server under attacker influence. Because the session is not bound to the authenticated hostname, the TLS resumption succeeds without re-validating host identity, potentially exposing request data or auth tokens intended for the original host to the attacker-controlled endpoint. …
Remediation Upgrade Node.js to version 26.3.1 (Current) or later, which is confirmed to contain the fix via commit attributed to Matteo Collina. … Detailed patch versions, workarounds, and compensating controls in full report.

Threat intelligence, references, and detailed analysis are available after sign-in.

CVE-2024-3566 CRITICAL POC
9.8 Apr 10

Command injection via Windows CreateProcess argument parsing affects multiple language runtimes and tooling (Node.js, PH

CVE-2026-48930 CRITICAL
9.8 Jun 18

Hostname validation bypass in Node.js (versions 22.22.3, 24.16.0, and 26.3.0) lets attackers smuggle embedded NUL bytes

CVE-2025-55130 CRITICAL
9.1 Jan 20

Node.js has a permissions model bypass that allows attackers to circumvent --allow-fs-read and --allow-fs-write restrict

CVE-2026-48931 LOW POC
3.7 Jun 18

Response queue poisoning in Node.js http.Agent allows network-accessible attackers to corrupt the HTTP keep-alive connec

CVE-2026-48933 HIGH
7.5 Jun 18

Denial of service in Node.js 26.x (fixed in 26.3.1) arises from an unguarded integer overflow when computing WebCrypto c

CVE-2026-48619 HIGH
7.5 Jun 18

Denial of service in Node.js HTTP/2 lets a remote peer exhaust process memory by driving unbounded growth of the connect

CVE-2026-48615 HIGH
7.5 Jun 18

Sensitive information disclosure in Node.js (versions 26.3.0, 24.16.0, and 22.22.3) leaks embedded proxy credentials whe

CVE-2025-59465 HIGH
7.5 Jan 20

A malformed `HTTP/2 HEADERS` frame with oversized, invalid `HPACK` data can cause Node.js to crash by triggering an unha

CVE-2026-48618 MEDIUM
6.5 Jun 18

Improper hostname normalization in Node.js TLS server-identity verification (fixed in v26.3.1) lets a TLS peer's hostnam

CVE-2026-48928 MEDIUM
5.4 Jun 18

TLS SNI context matching in Node.js performs case-sensitive hostname comparison, enabling network-accessible low-privile

CVE-2026-48935 LOW
3.3 Jun 18

Node.js permission model bypass via FileHandle.utimes() allows local low-privilege users to modify file timestamps on pa

CVE-2026-48936 LOW
3.3 Jun 18

Node.js Permission Model fails to apply net scope guards to pipe open and chmod operations, enabling a local authenticat

Vendor StatusVendor

SUSE

Severity: Moderate
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

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EUVD-2026-39612 vulnerability details – vuln.today

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