CVE-2026-49402

HIGHNVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.1 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 80% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
8.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.1Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
8.1
EG Score
8.1(medium)
EPSS
20.1%
KEV
Not listed

Published

June 16, 2026

Last Modified

June 26, 2026

Advisory Details (1)

Auto-updated Jun 23, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Command Injection via spawnSync & spawn on Windows · Advisory · denoland/deno · GitHub

https://github.com/denoland/deno/security/advisories/GHSA-7xh3-mhg9-jcw8

Vendor Advisories for CVE-2026-49402(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
crates.io(1)
PackageVulnerable rangeFixed inDependents
deno—2.7.10—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 20× in last 7d / 58× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-06 23:09 UTCEG score recompute
  2. 2026-07-06 16:27 UTCEPSS rescore
  3. 2026-07-06 06:48 UTCEG score recompute
  4. 2026-07-06 02:23 UTCEPSS rescore
  5. 2026-07-05 19:42 UTCEG score recompute
  6. 2026-07-05 08:42 UTCEG score recompute
  7. 2026-07-05 02:30 UTCEPSS rescore
  8. 2026-07-04 20:06 UTCEG score recompute
  9. 2026-07-04 09:08 UTCEG score recompute
  10. 2026-07-04 06:31 UTCEPSS rescore
  11. 2026-07-03 19:03 UTCEG score recompute
  12. 2026-07-03 08:09 UTCEG score recompute
  13. 2026-07-02 21:13 UTCEG score recompute
  14. 2026-07-02 10:18 UTCEG score recompute
  15. 2026-07-01 23:23 UTCEG score recompute
  16. 2026-07-01 15:07 UTCEPSS rescore
  17. 2026-07-01 12:28 UTCEG score recompute
  18. 2026-07-01 01:34 UTCEG score recompute
  19. 2026-06-30 23:22 UTCEPSS rescore
  20. 2026-06-30 14:39 UTCEG score recompute
  21. 2026-06-30 03:43 UTCEG score recompute
  22. 2026-06-29 16:38 UTCEG score recompute
  23. 2026-06-29 14:06 UTCEPSS rescore
  24. 2026-06-29 14:06 UTCEPSS rescore
  25. 2026-06-29 05:43 UTCEG score recompute
Show 33 more
  1. 2026-06-28 18:32 UTCEG score recompute
  2. 2026-06-28 14:07 UTCEPSS rescore
  3. 2026-06-28 07:37 UTCEG score recompute
  4. 2026-06-28 04:56 UTCEPSS rescore
  5. 2026-06-28 04:56 UTCEPSS rescore
  6. 2026-06-27 20:43 UTCEG score recompute
  7. 2026-06-27 09:46 UTCEG score recompute
  8. 2026-06-27 03:08 UTCEPSS rescore
  9. 2026-06-26 22:52 UTCEG score recompute
  10. 2026-06-26 11:50 UTCEG score recompute
  11. 2026-06-25 22:54 UTCEG score recompute
  12. 2026-06-25 13:49 UTCEPSS rescore
  13. 2026-06-25 11:59 UTCEG score recompute
  14. 2026-06-25 01:03 UTCEG score recompute
  15. 2026-06-24 14:07 UTCEG score recompute
  16. 2026-06-24 14:05 UTCEPSS rescore
  17. 2026-06-24 03:12 UTCEG score recompute
  18. 2026-06-23 16:16 UTCEG score recompute
  19. 2026-06-23 05:18 UTCEG score recompute
  20. 2026-06-22 18:20 UTCEG score recompute
  21. 2026-06-22 07:26 UTCEG score recompute
  22. 2026-06-21 20:29 UTCEG score recompute
  23. 2026-06-21 09:35 UTCEG score recompute
  24. 2026-06-20 22:23 UTCEG score recompute
  25. 2026-06-20 11:22 UTCEG score recompute
  26. 2026-06-20 00:25 UTCEG score recompute
  27. 2026-06-19 13:21 UTCEG score recompute
  28. 2026-06-19 02:27 UTCEG score recompute
  29. 2026-06-18 15:31 UTCEG score recompute
  30. 2026-06-18 04:33 UTCEG score recompute
  31. 2026-06-17 17:37 UTCEG score recompute
  32. 2026-06-17 06:43 UTCEG score recompute
  33. 2026-06-16 19:45 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-49402?
CVE-2026-49402 is a high vulnerability published on June 16, 2026. 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…
When was CVE-2026-49402 disclosed?
CVE-2026-49402 was first published in the National Vulnerability Database on June 16, 2026, with the most recent update on June 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-49402 actively exploited?
CVE-2026-49402 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 20.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-49402?
CVE-2026-49402 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-49402?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-49402, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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