Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV N H N N U H H H 8.1 .0034 26.5 —
AFFECTED Product Versions Fixed deno < 2.7.10 – —
TIMELINE May 29 Reserved by GitHub_M Jun 23 EXPLOIT PUBLISHED — CVE-2026-49402 (denoland deno). Public exploit reference added. Jun 23 Published (CNA: GitHub_M)
Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.7.10, Deno's node:child_process implementation provided an escapeShellArg() helper used when callers passed shell: true to spawn / spawnSync / exec and friends. On Windows, the helper failed to quote arguments that contained cmd.exe metacharacters and did not neutralize % (which cmd.exe expands even inside double-quoted strings). An attacker who controlled any portion of an argument passed to such a call could inject arbitrary additional commands into the spawned cmd.exe invocation. This vulnerability is fixed in 2.7.10.
| Date | Event | Detail |
|---|---|---|
| May 29, 2026 | Reserved | Reserved by GitHub_M |
| June 23, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-49402 (denoland deno). Public exploit reference added. |
| June 23, 2026 | Published | Published (CNA: GitHub_M) |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| denoland | deno | — | < 2.7.10 | — |
Authoritative record: CVE-2026-49402 at cve.org
Vendors: denoland
Weaknesses: CWE-78
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-49402 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.