What is CVE-2026-54321?

CVE-2026-54321 is a high-severity vulnerability in Daytonaio Daytona, classified under Insufficient Session Expiration. CVSS score: 7.0/10. Published 2026-06-23.

How severe is CVE-2026-54321?

High severity. CVSS v3 base score is 7.0 out of 10.

Auth bypass in Daytonaio Daytona

CVE-2026-54321

Daytona is a secure and elastic infrastructure runtime for AI-generated code execution and agent workflows. From 0.101.0 until 0.184.0, sandbox previews that were switched from public to private could remain reachable without authenticatio…

EPSS: 0.002 (16.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:L.

Affected products

Daytonaio Daytona — versions >= 0.101.0, < 0.184.0

Weakness classification (CWE)

CWE-613 — Insufficient Session Expiration
CWE-863 — Incorrect Authorization

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-54321?: CVE-2026-54321 is a high-severity vulnerability in Daytonaio Daytona, classified under Insufficient Session Expiration. CVSS score: 7.0/10. Published 2026-06-23.
How severe is CVE-2026-54321?: High severity. CVSS v3 base score is 7.0 out of 10.