What is CVE-2026-44726?

CVE-2026-44726 is a high-severity vulnerability in Denoland Deno, classified under Cleartext Transmission of Sensitive Information. CVSS score: 7.4/10. Published 2026-06-23.

How severe is CVE-2026-44726?

High severity. CVSS v3 base score is 7.4 out of 10.

Vulnerability in Denoland Deno

CVE-2026-44726

Deno is a JavaScript, TypeScript, and WebAssembly runtime. From 2.0.0 until 2.7.8, a flaw in Deno's Node.js tls compatibility layer could cause a TLS client to transmit application data in plaintext after a connection retry. When `autoSele…

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Denoland Deno — versions >= 2.0.0, < 2.7.8

Weakness classification (CWE)

CWE-319 — Cleartext Transmission of Sensitive Information

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-44726?: CVE-2026-44726 is a high-severity vulnerability in Denoland Deno, classified under Cleartext Transmission of Sensitive Information. CVSS score: 7.4/10. Published 2026-06-23.
How severe is CVE-2026-44726?: High severity. CVSS v3 base score is 7.4 out of 10.