CVE-2026-59206GHSA-75QM-GP28-RCQ9
n8n: Prototype Pollution via Workflow Credentials Leads to Unauthenticated User and Project Enumeration
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 2.28.1, 2.27.4, 1.123.61
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
n8n is an open source workflow automation platform. Prior to 1.123.61, 2.27.4, and, 2.28.1, an authenticated user with the default workflow:create permission could pollute Object.prototype through a crafted workflow saved, updated, or imported via the workflow API, allowing unauthenticated requests to be treated as a privileged user and exposing user and project listing endpoints. This issue is fixed in versions 1.123.61, 2.27.4, and 2.28.1.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- n8n-io n8n
From 2.28.0 · fixed in 2.28.1; From 2.0.0-rc.0 · fixed in 2.27.4; fixed in 1.123.61
- n8nnpm
fixed in 1.123.61
- n8nnpm
From 2.28.0 · fixed in 2.28.1
- n8nnpm
From 2.0.0-rc.0 · fixed in 2.27.4