CVE-2026-77076Network attack vector

Credential disclosure via persisted GraphQL errors

Published Aug 20, 2026 · Updated Aug 20, 2026

Information disclosure in n8n before 1.123.69, 2.33.4, and 2.34.1 allows authenticated users to read decrypted credential secrets. The GraphQL node re-throws a connection-level HTTP client error unchanged, and the execution engine stores the raw error with live request headers that include decrypted credential values. Exposure requires authenticated access to execution records after a failing GraphQL run, and the disclosed data is limited to secrets present in the persisted error payload.

CVSS severity7.1
High
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in n8n before 1.123.69, 2.33.4, and 2.34.1 allows authenticated users to read decrypted credential secrets. The GraphQL node re-throws a connection-level HTTP client error unchanged, and the execution engine stores the raw error with live request headers that include decrypted credential values. Exposure requires authenticated access to execution records after a failing GraphQL run, and the disclosed data is limited to secrets present in the persisted error payload.

The record

CVE
CVE-2026-77076
Published
Aug 20, 2026
Updated
Aug 20, 2026
Vendor
n8n
Product
n8n
Classifications
CWE-209, T1552.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.123.69
  2. Affected versionversion=0 <2.33.4
  3. Affected versionversion=0 <2.34.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

n8n · n8nversion=0 <1.123.69; version=0 <2.33.4; version=0 <2.34.1

Published CVSS scores

7.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-209Generation of Error Message Containing Sensitive Information
T1552.001Credentials In Files

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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