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CVE-2026-77076— n8n before 1.123.69 Credential Leak via GraphQL Node Error

Quick assessment

Affected
n8n-io n8n
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

n8n是n8n公司开源的一款支持持续集成与交付的工作流自动化工具。 n8n 1.123.69之前版本、2.33.4之前版本和2.34.1之前版本存在信息泄露漏洞，该漏洞源于GraphQL节点在处理连接失败的请求时直接抛出底层HTTP客户端错误，导致包含解密凭据的请求标头被持久化，可能造成信息泄露。

CVSS 7.1 · High EPSS 0.49% · P41

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 6

VendorProduct Version RangeStatus
n8n-io n8n < 1.123.69 affected
1.123.69 unaffected
2.34.0< 2.34.1 affected
2.34.1 unaffected
2.0.0< 2.33.4 affected
2.33.4 unaffected
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I. Basic Information for CVE-2026-77076

Vulnerability Information
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Vulnerability Title
n8n before 1.123.69 Credential Leak via GraphQL Node Error
Source: CVE Program / CVE List V5
Vulnerability Description
n8n versions before 1.123.69, 2.33.4, and 2.34.1 contain an information disclosure vulnerability in the GraphQL node. When a GraphQL request fails at the connection level, the node re-throws the underlying HTTP client error unchanged instead of wrapping it in n8n's standard error type. That error contains the live request's headers, including a decrypted credential secret, which the execution engine persists verbatim. Any authenticated user able to read the resulting execution can retrieve the decrypted credential secret from the stored run data.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过错误消息导致的信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
n8n 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
n8n是n8n公司开源的一款支持持续集成与交付的工作流自动化工具。 n8n 1.123.69之前版本、2.33.4之前版本和2.34.1之前版本存在信息泄露漏洞，该漏洞源于GraphQL节点在处理连接失败的请求时直接抛出底层HTTP客户端错误，导致包含解密凭据的请求标头被持久化，可能造成信息泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
n8n-io n8n 0 ~ 1.123.69 -
n8n-io n8n 2.34.0 ~ 2.34.1 -
n8n-io n8n 2.0.0 ~ 2.33.4 -

II. Public POCs for CVE-2026-77076

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III. Intelligence Information for CVE-2026-77076

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Vendor Advisories for CVE-2026-77076 (2)

Same Patch Batch · n8n-io · 2026-08-20 · 17 CVEs total

CVE-2026-77080 8.7 HIGH n8n before 1.123.69 Arbitrary File Read and Write via Snowflake
CVE-2026-77068 8.7 HIGH n8n before 2.34.1 Remote Code Execution via Path Traversal
CVE-2026-77075 8.4 HIGH n8n before 1.123.69 Expression Injection via Resource Locator
CVE-2026-77072 8.4 HIGH n8n before 1.123.69 Stored XSS via Form Completion Page
CVE-2026-77084 7.7 HIGH n8n before 1.123.69 Remote Code Execution via Git Node Configuration Values
CVE-2026-77079 7.4 HIGH n8n before 2.34.1 Authorization Bypass via Custom Role Deletion
CVE-2026-77077 7.2 HIGH n8n before 1.123.69 Remote Code Execution via EventEmitter Prototype Pollution
CVE-2026-77071 7.1 HIGH n8n before 1.123.69 PostgREST Filter Injection via Supabase
CVE-2026-77070 7.1 HIGH n8n before 1.123.69 NoSQL Injection via MongoDB Node
CVE-2026-77085 6.3 MEDIUM n8n before 2.34.1 SSRF Protection Bypass via SearXNG Tool
CVE-2026-77083 6.0 MEDIUM n8n before 1.123.69 Code Node Sandbox Escape via Function.prototype Pollution
CVE-2026-77074 6.0 MEDIUM n8n before 1.123.69 SSRF via Edit Image Node
CVE-2026-77073 5.3 MEDIUM n8n before 2.34.1 Cross-Project Credential Access via MCP
CVE-2026-77082 5.3 MEDIUM n8n before 1.123.69 ReDoS via Filter and Switch Node
CVE-2026-77081 5.1 MEDIUM n8n before 1.123.69 Allowed-Domains Bypass via GraphQL Node
CVE-2026-77069 2.3 LOW n8n before 1.123.69 SSRF Protection Bypass via OAuth2

IV. Related Vulnerabilities

Same product: n8n
Same vendor: n8n-io
Same weakness: CWE-209

V. Comments for CVE-2026-77076

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