What is CVE-2026-69207?

CVE-2026-69207 is a medium-severity vulnerability in Honojs Hono, classified under Inefficient Regular Expression Complexity. CVSS score: 5.3/10. Published 2026-08-07.

How severe is CVE-2026-69207?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Honojs Hono

CVE-2026-69207

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.34, the built-in CORS middleware, hono/cors, is vulnerable to a regular expression denial of service (ReDoS). During a preflight OPTIONS re…

Vulnerability class: ReDoS (Regular Expression Denial of Service)

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Honojs Hono — versions < 4.12.34

Weakness classification (CWE)

CWE-1333 — Inefficient Regular Expression Complexity

References

security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-69207?: CVE-2026-69207 is a medium-severity vulnerability in Honojs Hono, classified under Inefficient Regular Expression Complexity. CVSS score: 5.3/10. Published 2026-08-07.
How severe is CVE-2026-69207?: Medium severity. CVSS v3 base score is 5.3 out of 10.