n8n before 1.123.69, 2.x before 2.33.4, and 2.x before 2.34.1 contain an allowed-domains bypass in the GraphQL node. When the node's Authentication parameter is set to expression mode, every authentication-gated credential selector is treated as active; if two credentials of different types are attached, the node enforces the allowed-domains policy of only the first credential while still attaching material from both. An authenticated user with workflow-authoring rights can thereby send a domain-restricted credential to an attacker-controlled endpoint, exfiltrating it with the leaked credential's permissions.
CVE-2026-77081
MEDIUMPre-NVD 5.15.1Trending — 3 sources updated this week
EchelonGraph scoreLOW confidence
This medium-severity CVE scores 5.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: secondary
5.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 5.1Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 5.1
- EG Score
- 5.1(low)
- EG Risk
- 23(Track)EG Risk 23/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity51% × 45%Exploitation0% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- —
- EPSS %ILE
- —
- KEV
- Not listed
Published
August 20, 2026
Last Modified
August 20, 2026
Advisory Details (2)
Auto-updated Aug 20, 2026Patch available. Sources: github.
generic
n8n before 1.123.69 Allowed-Domains Bypass via GraphQL Node | Advisories | VulnCheck
https://www.vulncheck.com/advisories/n8n-before-allowed-domains-bypass-via-graphql-nodegithub Patch Available
GraphQL Node Allowed-Domains Bypass Permits Restricted Credential Exfiltration · Advisory · n8n-io/n8n · GitHub
https://github.com/n8n-io/n8n/security/advisories/GHSA-wcv8-x773-j96rVendor Advisories for CVE-2026-77081(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 7× in last 7d / 7× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-08-20 16:32 UTCEG score recompute
- 2026-08-20 16:32 UTCGHSA enrichment
- 2026-08-20 15:27 UTCEG score recompute
- 2026-08-20 15:27 UTCGHSA enrichment
- 2026-08-20 12:20 UTCEG score recompute
- 2026-08-20 11:37 UTCEG score recompute
- 2026-08-20 11:36 UTCMITRE cvelistV5first tracked
Frequently asked(4)
What is CVE-2026-77081?
CVE-2026-77081 is a medium vulnerability published on August 20, 2026. n8n before 1.123.69, 2.x before 2.33.4, and 2.x before 2.34.1 contain an allowed-domains bypass in the GraphQL node. When the node's Authentication parameter is set to expression mode, every authentication-gated credential selector is treated as active; if two credentials of different types are…
When was CVE-2026-77081 disclosed?
CVE-2026-77081 was first published in the National Vulnerability Database on August 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-77081?
CVE-2026-77081 has a CVSS v3 base score of 5.1 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-77081?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-77081, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-77081
Is Your Infrastructure Affected by CVE-2026-77081?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.