CVE-2026-77083: n8n is a workflow automation platform

Q: How do I fix CVE-2026-77083?

n8n: upgrade to 1.123.69, 2.33.4. Exact commands for each OS are on this page.

Q: Is CVE-2026-77083 being exploited?

CVE-2026-77083 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-77083 affect?

CVE-2026-77083 affects n8n. Severity is medium (CVSS 5.9). n8n is a workflow automation platform. In versions prior to 1.123.69, 2.33.4, and 2.34.1, the JavaScript Code node's VM sandbox did not freeze the sandbox's Function.prototype, allowing an authenticated user with the ability to create and e

Q: How urgent is CVE-2026-77083?

Priority 28/100. No elevated risk signals yet.

Routine

MEDIUM 5.9UPGRADE

CVE-2026-77083 is a medium-severity flaw (CVSS 5.9) affecting n8n. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

n8n is a workflow automation platform. In versions prior to 1.123.69, 2.33.4, and 2.34.1, the JavaScript Code node's VM sandbox did not freeze the sandbox's Function.prototype, allowing an authenticated user with the ability to create and execute workflows to pollute it from within a Code node execution and recover a reference to the host's globalThis, resulting in a sandbox escape. The full exploit chain additionally depends on specific modules

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.9 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 70%)
CISA exploited list	No
Weakness	CWE-1321
Published	2026-08-20
Last modified	2026-09-01

Publisher (CNA): VulnCheck · Vendor: n8n

Last updated 2026-09-01 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-20 12:16 UTCPublished CVE record published
2026-09-01 19:49 UTCUpdated Record last modified

n8n n8n UPGRADE

Affected: < 1.123.69 · >= 2.0.0 and < 2.33.4 · 2.34.0

Fixed in: 1.123.69, 2.33.4

Safe to downgrade to: a release before 2.0.0

1. Check installed version

npm ls n8n

2. UPGRADE to 1.123.69

npm install n8n@">=1.123.69"

3. If no update is available yet, DOWNGRADE to a release before 2.0.0

npm view n8n versions npm install n8n@"<2.0.0"

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-77083?

n8n: upgrade to 1.123.69, 2.33.4. Exact commands for each OS are on this page.

Is CVE-2026-77083 being exploited?

CVE-2026-77083 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-77083 affect?

CVE-2026-77083 affects n8n. Severity is medium (CVSS 5.9). n8n is a workflow automation platform. In versions prior to 1.123.69, 2.33.4, and 2.34.1, the JavaScript Code node's VM sandbox did not freeze the sandbox's Function.prototype, allowing an authenticated user with the ability to create and e

How urgent is CVE-2026-77083?

Priority 28/100. No elevated risk signals yet.

Related CVEs

CVE-2026-54309 CRITICAL 10.0 UPGRADE n8n is an open source workflow automation platform
CVE-2026-54310 CRITICAL 9.9 UPGRADE n8n is an open source workflow automation platform
CVE-2026-44789 CRITICAL 9.9 UPGRADE n8n is an open source workflow automation platform
CVE-2026-44791 CRITICAL 9.9 UPGRADE n8n is an open source workflow automation platform
CVE-2026-54314 HIGH 7.5 UPGRADE n8n is an open source workflow automation platform

References

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