CVE-2026-49411

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 98% 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, secondary
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.5Exploit: 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 2.8.0, the Node.js compatibility TCP path checked the permission against the original hostname string before resolution and then did not re-check after resolution. A caller could therefore pass a numeric alias of an IP address (for example the decimal integer 2130706433 or the hex form 0x7f000001, both of which resolve to 127.0.0.1) and reach the denied destination through node:net.connect or node:http.request's { host, port } options form. This vulnerability is fixed in 2.8.0.

CVSS v3
6.5
EG Score
6.5(medium)
EPSS
1.6%
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

Deno Node TCPWrap numeric hostname aliases bypass --deny-net resolved-IP deny checks · Advisory · denoland/deno · GitHub

https://github.com/denoland/deno/security/advisories/GHSA-v8fw-85r8-5m23

Vendor Advisories for CVE-2026-49411(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—2.8.0—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 31× 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 23:08 UTCEG score recompute
  2. 2026-07-06 16:27 UTCEPSS rescore
  3. 2026-07-06 02:23 UTCEPSS rescore
  4. 2026-07-05 22:11 UTCEG score recompute
  5. 2026-07-05 02:30 UTCEPSS rescore
  6. 2026-07-04 22:04 UTCEG score recompute
  7. 2026-07-04 06:31 UTCEPSS rescore
  8. 2026-07-03 21:55 UTCEG score recompute
  9. 2026-07-02 21:46 UTCEG score recompute
  10. 2026-07-01 21:40 UTCEG score recompute
  11. 2026-06-30 23:22 UTCEPSS rescore
  12. 2026-06-30 21:32 UTCEG score recompute
  13. 2026-06-29 21:25 UTCEG score recompute
  14. 2026-06-28 21:19 UTCEG score recompute
  15. 2026-06-28 14:07 UTCEPSS rescore
  16. 2026-06-28 04:56 UTCEPSS rescore
  17. 2026-06-28 04:56 UTCEPSS rescore
  18. 2026-06-27 21:12 UTCEG score recompute
  19. 2026-06-27 03:08 UTCEPSS rescore
  20. 2026-06-26 21:05 UTCEG score recompute
  21. 2026-06-25 20:59 UTCEG score recompute
  22. 2026-06-24 20:52 UTCEG score recompute
  23. 2026-06-24 14:05 UTCEPSS rescore
  24. 2026-06-23 20:45 UTCEG score recompute
  25. 2026-06-22 20:31 UTCEG score recompute
Show 6 more
  1. 2026-06-21 20:24 UTCEG score recompute
  2. 2026-06-20 20:16 UTCEG score recompute
  3. 2026-06-19 20:09 UTCEG score recompute
  4. 2026-06-18 20:02 UTCEG score recompute
  5. 2026-06-17 19:52 UTCEG score recompute
  6. 2026-06-16 19:45 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-49411?
CVE-2026-49411 is a medium vulnerability published on June 16, 2026. Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.8.0, the Node.js compatibility TCP path checked the permission against the original hostname string before resolution and then did not re-check after resolution. A caller could therefore pass a numeric alias of an IP address (for…
When was CVE-2026-49411 disclosed?
CVE-2026-49411 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-2026-49411 actively exploited?
CVE-2026-49411 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-49411?
CVE-2026-49411 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-49411?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-49411, 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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