CVE-2026-65594: n8n before 2.29.8 and 2.30.x before 2.30.1 (affected from 2.27.0, when the OAuth 2.1 consent and token-issuanc

Routine

MEDIUM 6.5UPGRADE

CVE-2026-65594 is a medium-severity flaw (CVSS 6.5) affecting n8n. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

n8n before 2.29.8 and 2.30.x before 2.30.1 (affected from 2.27.0, when the OAuth 2.1 consent and token-issuance flow was introduced) does not verify that the authenticated user has access to the workflow referenced as the OAuth resource. On instances with at least one active MCP Server Trigger workflow configured with n8n OAuth2 authentication, a member-level user can register an OAuth client, self-approve consent for another user's workflow, and

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 63%)
CISA exploited list	No
Weakness	CWE-863
Published	2026-07-22
Last modified	2026-10-24

Publisher (CNA): VulnCheck · Vendor: n8n

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-22 12:18 UTCPublished CVE record published
2026-10-24 17:10 UTCUpdated Record last modified

n8n n8n UPGRADE

Affected: >= 2.27.0 and < 2.29.8 · 2.30.0

Fixed in: 2.29.8

Safe to downgrade to: a release before 2.27.0

1. Check installed version

npm ls n8n

2. UPGRADE to 2.29.8

npm install n8n@">=2.29.8"

3. If no update is available yet, DOWNGRADE to a release before 2.27.0

npm view n8n versions npm install n8n@"<2.27.0"

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.

Exact fixes by distribution

npm · n8n · FIXED · 2.30.1 · vulnerable: >= 2.30.0, < 2.30.1 · source

npm install n8n@">=2.30.1" npm ls n8n

Fedora 46 · uv · FIXED · 0.13.5-2.fc46 · FEDORA-2026-0a45cde16b · source

sudo dnf upgrade --advisory=FEDORA-2026-0a45cde16b

Fedora ELN · oo7 · FIXED · 0.7.0~beta-3.eln159 · FEDORA-2026-f348262964 · source

sudo dnf upgrade --advisory=FEDORA-2026-f348262964

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-2026-65594?

n8n: upgrade to 2.29.8. Exact commands for each OS are on this page.

Is CVE-2026-65594 being exploited?

CVE-2026-65594 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-2026-65594 affect?

CVE-2026-65594 affects n8n. Severity is medium (CVSS 6.5). n8n before 2.29.8 and 2.30.x before 2.30.1 (affected from 2.27.0, when the OAuth 2.1 consent and token-issuance flow was introduced) does not verify that the authenticated user has access to the workflow referenced as the OAuth resource. On

How urgent is CVE-2026-65594?

Priority 32/100. No elevated risk signals yet.

Related CVEs

CVE-2026-58661 MEDIUM 4.3 UPGRADE n8n before 2.28.0 (and before 1.123.58 on the 1.x branch) contains a disk space exhaustion vulnerability in th
CVE-2026-56353 MEDIUM 4.8 UPGRADE n8n contains an authentication bypass in the Chat Trigger node when configured with n8n User Auth (a non-defau
CVE-2026-59259 MEDIUM 6.5 UPGRADE n8n before versions 1.123.61, 2.27.4, and 2.28.1 contains a permission bypass vulnerability in external secret
CVE-2026-65590 CRITICAL 9.8 UPGRADE n8n before 2.29.8 and 2.30.x before 2.30.1 does not enforce shell sandbox restrictions on Linux and Windows in
CVE-2026-65591 HIGH 8.8 UPGRADE n8n contains a sanitizer bypass vulnerability in the legacy expression evaluator's computed-member handler

References

← Back to latest CVEs