CVE-2026-44726
- Source
- https://cve.org/CVERecord?id=CVE-2026-44726
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44726.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-44726
- Aliases
- Downstream
- Published
- 2026-06-23T17:24:02Z
- Modified
- 2026-10-20T11:59:55Z
- Severity
-
- 7.4 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
- Summary
- Deno: TLS retry copies stale upgrade hook, risking plaintext traffic
- Details
-
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 `autoSelectFamily was enabled and the first address-family attempt failed, the socket reinitialization path reused a stale TLS upgrade hook that was bound to the original, failed handle. As a result, the replacement TCP connection was never upgraded to TLS, and any data the application wrote before the secureConnect event travelled over the network unencrypted. A network attacker positioned to cause the initial connection attempt to fail (for example, by dropping IPv6 traffic on a dual-stack host) could deterministically trigger the fallback path and observe or tamper with traffic that the application believed was TLS-protected. This vulnerability is fixed in 2.7.8.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-319" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44726.json" }- References
Affected packages
Git / github.com/denoland/deno
Affected ranges
- Type
- GIT
- Repo
- https://github.com/denoland/deno
- Events
- Database specific
-
Show details
{ "extracted_events": [ { "introduced": "2.0.0" }, { "fixed": "2.7.8" }, { "cpe": "cpe:2.3:a:deno:deno:*:*:*:*:*:*:*:*", "range": [ { "introduced": "2.0.0" }, { "fixed": "2.7.8" } ], "source": "CPE_RANGE" } ], "source": "AFFECTED_FIELD" }