CVE-2026-21858

criticalpriority · track · 37EPSS 0.782 · 100 %ileexploit · PoCDEEUNLRUUS
grimoire priorityP1 · Urgent
Exploitable?
Public exploit
17 exploits · PoC
Likely / severe?
78.2% (100th) EPSS
CVSS 10 · critical
Is it mine?
10 products
Check your exposure
Who says so?
7 sources
cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

n8n is an open source workflow automation platform. Versions starting with 1.65.0 and below 1.121.0 enable an attacker to access files on the underlying server through execution of certain form-based workflows. A vulnerable workflow could grant access to an unauthenticated remote attacker, resulting in exposure of sensitive information stored on the system and may enable further compromise depending on deployment configuration and workflow usage. This issue is fixed in version 1.121.0.

01

cvss

Technical severity, 0–10. One row per scoring source.

10.0
010

base score 0–10 · higher = more severe · hover a vector to decode

v3.110criticalAV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:Nsecondary · FSTEC (BDU) RU
v3.110criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:Nsecondary · ENISA EU
v3.110criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:Nsecondary · security-advisories@github.comexploitability 3.9 · impact 5.8
v3.110criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:Nsecondary · OSV
v3.110criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N/E:Hsecondary · CVSS-BT (t0sche)
v3.110criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:Nsecondary · NCSC-NL NL
02

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USCWE-20USCWE-20USCWE-20US
04

exploits (17)

Public proof-of-concept and weaponised exploit code.

05

affected products (10)

Products and version ranges known to be affected.

06

advisories (3)

Vendor and ecosystem advisories describing this.

  • NCSC-2026-0002Kwetsbaarheid verholpen in n8nNL2026-01-08csaf · ncsc_nlNL

    N8n heeft een kwetsbaarheid verholpen in versies onder 1.121.0.

  • WID-SEC-W-2026-0040n8n: Mehrere SchwachstellenDeutsch2026-01-07csaf · cert_bundDE

    Ein Angreifer kann mehrere Schwachstellen in n8n ausnutzen, um beliebigen Programmcode auszuführen, vertrauliche Informationen offenzulegen und Sicherheitsmaßnahmen zu umgehen.

  • GHSA-v4pr-fm98-w9pgn8n Vulnerable to Unauthenticated File Access via Improper Webhook Request Handling2026-01-07ghsa · osvUS

    ### Impact A vulnerability in n8n allows an attacker to access files on the underlying server through execution of certain form-based workflows. A vulnerable workflow could grant access to an unauthenticated remote attacker. This could result in exposure of sensitive information stored on the system and may enable further compromise depending on deployment configuration and workflow usage. ### Patches The issue has been fixed in n8n version 1.121.0. Users should upgrade to this version or later to remediate the vulnerability. ### Workarounds No official workarounds are available. As a temporary mitigation, users may restrict or disable publicly accessible webhook and form endpoints until upgrading.

07

also known as (4)

Other names and identifiers for this entity.

08

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bducert_bundncsc_nlnvdosvNVDCVE.orgMITRE
published 2026-01-08modified 2026-06-17
09

references (6)

External citations — patches, advisories, analysis.

scry

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