Is CVE-2026-54311 in the CISA KEV catalog?

No. CVE-2026-54311 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-54311?

CVE-2026-54311 has a CVSS v3 base score of 7.7 (HIGH).

What is the EPSS score for CVE-2026-54311?

CVE-2026-54311 has an EPSS score of 0.32% (24th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-54311?

Upgrade n8n to 2.26.2 or later.

CVE & CISA-KEV Catalog

CVE-2026-54311

HIGH

7.7

CVSS v3

NVD

Description

n8n is an open source workflow automation platform. Prior to 2.25.7 and 2.26.2, an authenticated user with permission to create or modify workflows could pollute the sandbox used by the Merge node's SQL Query mode. Because the sandbox context was cached and reused across all workflow executions on the instance, prototype mutations introduced by one user's workflow persist into subsequent Merge SQL executions belonging to other users or projects. This allowed a low-privileged attacker to intercept workflow data processed by other users on the same instance. This issue only affects multi-user n8n instances where more than one user has permission to create and execute workflows containing the Merge node in SQL Query mode. This vulnerability is fixed in 2.25.7 and 2.26.2.

CWE-488

How to fix

Remediation Available

n8nNVD

Affected:>= 2.26.0, < 2.26.2Fixed in:2.26.2CVE-2026-54311derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Exploit Intelligence

0.32%probability of exploitation in 30 days

24thpercentile

Low risk: more likely to be exploited than 24% of all known CVEs.

References

Vendor Advisory1

github.com

Related Vulnerabilities

Other CWE-488 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-38367	High	8.2	11%	-	Fix
CVE-2024-6162	High	7.5	1.7%	-	Fix
CVE-2025-1247	High	8.3	0.8%	-	-
CVE-2024-27935	High	7.2	0.7%	-	Fix
CVE-2024-27455	Critical	9.1	0.6%	-	-
CVE-2024-5148	High	7.5	0.6%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-25.