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Node.js EUVDEUVD-2026-51022

| CVE-2026-56847 MEDIUM
Excessive Use of Unconditional Branching (CWE-1119)
2026-07-29 GHSA-hw7r-7v27-7388
Information Disclosure Node.js Red Hat Suse Node Js
6.1
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
6.1 MEDIUM
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
vuln.today AI
3.3 LOW

Local-only exploitation requiring an existing low-privilege process context with experimental permission mode enabled; impact is limited to unauthorized integrity writes with no confidentiality or availability effect.

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

Primary rating from NVD.

CVSS VectorNVD

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

Lifecycle Timeline

7
Severity Changed
Aug 25, 2026 - 17:52 NVD
LOW MEDIUM
CVSS changed
Aug 25, 2026 - 17:52 NVD
3.3 (LOW) 6.1 (MEDIUM)
Source Code Evidence Fetched
Jul 30, 2026 - 08:40 vuln.today
Analysis Generated
Jul 30, 2026 - 08:40 vuln.today
CVSS changed
Jul 30, 2026 - 06:37 NVD
3.3 (LOW)
CVE Published
Jul 29, 2026 - 14:02 github-releases
UNKNOWN (no severity yet)
CVE Published
Jul 29, 2026 - 14:02 github-releases
LOW 3.3

Description PRE-NVD

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

AnalysisAI

Node.js Permission Model fails to enforce filesystem write restrictions for the trace events subsystem, allowing a local attacker with low privileges to write files to paths explicitly blocked by the operator via the --experimental-permission flag. Rated Low severity (CVSS 3.3), this flaw affects Node.js 22.x through 22.23.1, 24.x through 24.18.0, and 26.x through 26.5.0, and is one of ten CVEs addressed in the July 2026 Node.js security release. No public exploit code has been identified and the vulnerability is not listed in CISA KEV; the fix is available in Node.js 26.5.1 released 2026-07-29.

Technical ContextAI

Node.js's experimental Permission Model, activated via the --experimental-permission CLI flag, allows operators to explicitly constrain what filesystem paths a process may read or write using --allow-fs-read and --allow-fs-write. The trace events subsystem, enabled via --trace-event-categories or --trace-events-enabled, writes structured diagnostic output to disk as part of V8 and Node.js core instrumentation. CVE-2026-56847 exposes a gap where the Permission Model's fs write enforcement is not applied to the path used by trace events output, meaning trace data can be written to locations outside the operator-defined allow-list. The assigned CWE is CWE-1119 (Insufficient Documentation of Error Handling Techniques), though the root cause is more precisely an access-control enforcement gap consistent with CWE-863 (Incorrect Authorization) - this discrepancy is worth noting. Affected CPE entries span the 22.x (Maintenance LTS), 24.x (Active LTS), and 26.x (Current) Node.js release lines per EUVD-2026-51022.

RemediationAI

Upgrade to Node.js 26.5.1 or the corresponding patched release for the active 22.x or 24.x branch, as announced in the July 2026 Node.js security releases at https://nodejs.org/en/blog/vulnerability/july-2026-security-releases and detailed at https://github.com/nodejs/node/releases/tag/v26.5.1. If an immediate upgrade is not feasible and the deployment uses --experimental-permission, the most targeted workaround is to remove trace event flags (--trace-event-categories, --trace-events-enabled) from the Node.js invocation, eliminating the write path that bypasses Permission Model enforcement; note that this sacrifices diagnostic trace capability. Deployments not using --experimental-permission require no action, as the vulnerability is entirely scoped to that non-default mode.

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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
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 16.0 SUSE Linux Enterprise Server for SAP applications 16.0 Fixed
SUSE Linux Enterprise Server for SAP Applications 15 SP6 Fixed
openSUSE Leap 16.0 Fixed

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EUVD-2026-51022 vulnerability details – vuln.today
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