CVE-2026-48748

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 71% 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
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0

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

Netty is a network application framework for development of protocol servers and clients. Prior to version 4.2.15.Final, a memory exhaustion vulnerability in the Netty HTTP/3 codec allows the creation of an infinite number of blocked streams, which can cause OOM error. Version 4.2.15.Final patches the issue.

CVSS v3
7.5
EG Score
7.5(medium)
EPSS
28.6%
KEV
Not listed

Published

June 12, 2026

Last Modified

June 30, 2026

Advisory Details (2)

Auto-updated Jun 12, 2026
Patch available. Sources: github_release, github.
github Patch Available

Netty HTTP/3 QPACK Blocked Streams Memory Exhaustion · Advisory · netty/netty · GitHub

https://github.com/netty/netty/security/advisories/GHSA-4grm-h2qv-h6w6
github_release Patch Available

netty-4.2.15.Final

Patch available: netty/netty netty-4.2.15.Final

https://github.com/netty/netty/releases/tag/netty-4.2.15.Final

Vendor Advisories for CVE-2026-48748(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)
Maven(1)
PackageVulnerable rangeFixed inDependents
io.netty:netty-codec-http34.2.10.Final ... 4.2.9.Final (13 versions)4.2.15.Final—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 19× in last 7d / 79× 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. 2026-07-07 01:12 UTCEG score recompute
  2. 2026-07-06 16:27 UTCEPSS rescore
  3. 2026-07-06 02:23 UTCEPSS rescore
  4. 2026-07-05 23:38 UTCEG score recompute
  5. 2026-07-05 11:24 UTCEG score recompute
  6. 2026-07-05 02:30 UTCEPSS rescore
  7. 2026-07-04 23:10 UTCEG score recompute
  8. 2026-07-04 10:56 UTCEG score recompute
  9. 2026-07-04 06:31 UTCEPSS rescore
  10. 2026-07-03 20:50 UTCEG score recompute
  11. 2026-07-03 08:36 UTCEG score recompute
  12. 2026-07-02 20:20 UTCEG score recompute
  13. 2026-07-02 08:07 UTCEG score recompute
  14. 2026-07-01 19:51 UTCEG score recompute
  15. 2026-07-01 15:07 UTCEPSS rescore
  16. 2026-07-01 07:38 UTCEG score recompute
  17. 2026-06-30 23:22 UTCEPSS rescore
  18. 2026-06-30 19:24 UTCEG score recompute
  19. 2026-06-30 07:10 UTCEG score recompute
  20. 2026-06-29 18:48 UTCEG score recompute
  21. 2026-06-29 06:16 UTCEG score recompute
  22. 2026-06-28 15:48 UTCEG score recompute
  23. 2026-06-28 14:07 UTCEPSS rescore
  24. 2026-06-28 04:56 UTCEPSS rescore
  25. 2026-06-28 04:56 UTCEPSS rescore
Show 54 more
  1. 2026-06-28 03:33 UTCEG score recompute
  2. 2026-06-27 15:19 UTCEG score recompute
  3. 2026-06-27 03:08 UTCEPSS rescore
  4. 2026-06-27 03:05 UTCEG score recompute
  5. 2026-06-26 14:49 UTCEG score recompute
  6. 2026-06-26 02:21 UTCEG score recompute
  7. 2026-06-25 14:07 UTCEG score recompute
  8. 2026-06-25 13:49 UTCEPSS rescore
  9. 2026-06-25 01:53 UTCEG score recompute
  10. 2026-06-24 14:05 UTCEPSS rescore
  11. 2026-06-24 13:39 UTCEG score recompute
  12. 2026-06-24 01:25 UTCEG score recompute
  13. 2026-06-23 21:33 UTCEPSS rescore
  14. 2026-06-23 21:33 UTCEPSS rescore
  15. 2026-06-23 13:09 UTCEG score recompute
  16. 2026-06-23 00:51 UTCEG score recompute
  17. 2026-06-22 14:25 UTCEPSS rescore
  18. 2026-06-22 14:25 UTCEPSS rescore
  19. 2026-06-22 12:12 UTCEG score recompute
  20. 2026-06-21 23:45 UTCEG score recompute
  21. 2026-06-21 14:56 UTCEPSS rescore
  22. 2026-06-21 14:56 UTCEPSS rescore
  23. 2026-06-21 10:54 UTCEG score recompute
  24. 2026-06-21 01:59 UTCEPSS rescore
  25. 2026-06-21 01:59 UTCEPSS rescore
  26. 2026-06-20 22:38 UTCEG score recompute
  27. 2026-06-20 09:59 UTCEG score recompute
  28. 2026-06-19 21:42 UTCEG score recompute
  29. 2026-06-19 19:26 UTCEPSS rescore
  30. 2026-06-19 19:26 UTCEPSS rescore
  31. 2026-06-19 09:21 UTCEG score recompute
  32. 2026-06-18 21:08 UTCEG score recompute
  33. 2026-06-18 17:52 UTCEPSS rescore
  34. 2026-06-18 17:52 UTCEPSS rescore
  35. 2026-06-18 08:54 UTCEG score recompute
  36. 2026-06-17 20:34 UTCEG score recompute
  37. 2026-06-17 17:53 UTCEPSS rescore
  38. 2026-06-17 08:21 UTCEG score recompute
  39. 2026-06-16 20:08 UTCEG score recompute
  40. 2026-06-16 17:53 UTCEPSS rescore
  41. 2026-06-16 07:54 UTCEG score recompute
  42. 2026-06-15 19:41 UTCEG score recompute
  43. 2026-06-15 17:49 UTCEPSS rescore
  44. 2026-06-15 17:49 UTCEPSS rescore
  45. 2026-06-15 07:26 UTCEG score recompute
  46. 2026-06-14 23:18 UTCEPSS rescore
  47. 2026-06-14 19:11 UTCEG score recompute
  48. 2026-06-14 06:58 UTCEG score recompute
  49. 2026-06-13 23:00 UTCEPSS rescore
  50. 2026-06-13 18:44 UTCEG score recompute
  51. 2026-06-13 06:29 UTCEG score recompute
  52. 2026-06-12 23:12 UTCEPSS rescore
  53. 2026-06-12 18:15 UTCEG score recompute
  54. 2026-06-12 18:13 UTCNVD updatefirst tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-48748?
CVE-2026-48748 is a high vulnerability published on June 12, 2026. Netty is a network application framework for development of protocol servers and clients. Prior to version 4.2.15.Final, a memory exhaustion vulnerability in the Netty HTTP/3 codec allows the creation of an infinite number of blocked streams, which can cause OOM error. Version 4.2.15.Final patches…
When was CVE-2026-48748 disclosed?
CVE-2026-48748 was first published in the National Vulnerability Database on June 12, 2026, with the most recent update on June 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-48748 actively exploited?
CVE-2026-48748 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 28.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-48748?
CVE-2026-48748 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-48748?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-48748, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-48748

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