CVE-2026-48043

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.6%, top 56% 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
Trending — 3 sources updated this week
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.5Exploit: NoneExposed: 0

A fix is available — apply it.

Netty is a network application framework for development of protocol servers and clients. In netty-codec-http2 prior to versions 4.1.135.Final and 4.2.15.Final, the DelegatingDecompressorFrameListener class orchestrates HTTP/2 decompression by embedding a per-stream EmbeddedChannel that runs the appropriate decompression codec (gzip, deflate, zstd) and forwards decompressed chunks to a wrapped listener. Each decompressed chunk is a pooled ByteBuf handed to an anonymous ChannelInboundHandlerAdapter tail handler, which becomes the sole owner responsible for releasing it. A remote peer could send frames that would result in the flow-controller throwing and so trigger a resource leak which at the end might take down the whole JVM due OOME. Versions 4.1.135.Final and 4.2.15.Final patch the issue.

CVSS v3
7.5
EG Score
7.5(medium)
EPSS
45.9%
KEV
Not listed

Published

June 11, 2026

Last Modified

July 21, 2026

Advisory Details (3)

Auto-updated Jun 13, 2026
Patch available. Sources: github_release, github.
github Patch Available

[codec-http2] ByteBuf Reference-Count Leak in DelegatingDecompressorFrameListener Leads to Memory Exhaustion · Advisory · netty/netty · GitHub

https://github.com/netty/netty/security/advisories/GHSA-c2gf-v879-257j
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
github_release Patch Available

netty-4.1.135.Final

Patch available: netty/netty netty-4.1.135.Final

https://github.com/netty/netty/releases/tag/netty-4.1.135.Final

Vendor Advisories for CVE-2026-48043(8)

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

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatnetty-codec-http22026-07-09redhat
redhatdevspaces/server-rhel9:17830333972026-07-08redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
Maven(1)
PackageVulnerable rangeFixed inDependents
io.netty:netty-codec-http24.2.0.Alpha1 ... 4.2.9.Final (25 versions)4.2.15.Final—

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 83× 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.

Showing the most recent 100 of 112 total refreshes for this CVE.

  1. 2026-07-22 14:08 UTCEPSS rescore
  2. 2026-07-21 15:24 UTCEPSS rescore
  3. 2026-07-20 17:08 UTCEPSS rescore
  4. 2026-07-19 14:31 UTCEPSS rescore
  5. 2026-07-19 02:29 UTCEPSS rescore
  6. 2026-07-18 10:04 UTCEPSS rescore
  7. 2026-07-16 23:29 UTCVendor advisory
  8. 2026-07-16 17:03 UTCEPSS rescore
  9. 2026-07-16 04:27 UTCEG score recompute▲ 2.20
  10. 2026-07-16 04:27 UTCVendor advisory
  11. 2026-07-15 16:57 UTCEPSS rescore
  12. 2026-07-15 02:26 UTCNVD updateCVSS v3 → 7.5 · severity → HIGH
  13. 2026-07-15 02:00 UTCEPSS rescore
  14. 2026-07-15 01:43 UTCEG score recompute▼ 2.20
  15. 2026-07-15 01:43 UTCVendor advisory
  16. 2026-07-15 01:21 UTCMITRE cvelistV5CVSS v3 → 5.3 · severity → MEDIUM
  17. 2026-07-14 12:43 UTCVendor advisory
  18. 2026-07-14 01:27 UTCVendor advisory
  19. 2026-07-13 22:30 UTCEPSS rescore
  20. 2026-07-13 13:35 UTCVendor advisory
  21. 2026-07-13 06:13 UTCEPSS rescore
  22. 2026-07-12 20:33 UTCVendor advisory
  23. 2026-07-12 05:46 UTCEPSS rescore
  24. 2026-07-12 03:53 UTCVendor advisory
  25. 2026-07-11 16:20 UTCVendor advisory
Show 75 more
  1. 2026-07-11 08:27 UTCEPSS rescore
  2. 2026-07-11 05:03 UTCVendor advisory
  3. 2026-07-10 17:48 UTCEG score recompute▲ 2.20
  4. 2026-07-10 17:48 UTCVendor advisory
  5. 2026-07-10 12:27 UTCNVD updateCVSS v3 → 7.5 · severity → HIGH
  6. 2026-07-10 12:12 UTCMITRE cvelistV5CVSS v3 → 5.3 · severity → MEDIUM
  7. 2026-07-09 19:10 UTCEPSS rescore
  8. 2026-07-09 13:52 UTCNVD updateCVSS v3 → 7.5 · severity → HIGH
  9. 2026-07-09 09:17 UTCVendor advisory
  10. 2026-07-08 15:16 UTCEPSS rescore
  11. 2026-07-08 06:40 UTCVendor advisory
  12. 2026-07-07 13:46 UTCEPSS rescore
  13. 2026-07-07 03:10 UTCEG score recompute▼ 2.20
  14. 2026-07-07 03:10 UTCVendor advisory
  15. 2026-07-06 16:27 UTCEPSS rescore
  16. 2026-07-06 13:07 UTCMITRE cvelistV5CVSS v3 → 5.3 · severity → MEDIUM
  17. 2026-07-06 02:23 UTCEPSS rescore
  18. 2026-07-05 22:19 UTCVendor advisory
  19. 2026-07-05 11:05 UTCVendor advisory
  20. 2026-07-05 02:30 UTCEPSS rescore
  21. 2026-07-04 22:47 UTCVendor advisory
  22. 2026-07-04 11:26 UTCVendor advisory
  23. 2026-07-04 06:31 UTCEPSS rescore
  24. 2026-07-03 14:49 UTCVendor advisory
  25. 2026-07-03 02:12 UTCVendor advisory
  26. 2026-07-02 14:55 UTCVendor advisory
  27. 2026-07-02 03:40 UTCVendor advisory
  28. 2026-07-01 16:24 UTCVendor advisory
  29. 2026-07-01 15:07 UTCEPSS rescore
  30. 2026-07-01 05:09 UTCVendor advisory
  31. 2026-06-30 23:22 UTCEPSS rescore
  32. 2026-06-30 17:37 UTCVendor advisory
  33. 2026-06-30 06:22 UTCVendor advisory
  34. 2026-06-29 19:06 UTCVendor advisory
  35. 2026-06-29 14:06 UTCEPSS rescore
  36. 2026-06-29 14:06 UTCEPSS rescore
  37. 2026-06-29 07:48 UTCVendor advisory
  38. 2026-06-28 20:29 UTCVendor advisory
  39. 2026-06-28 14:07 UTCEPSS rescore
  40. 2026-06-28 09:14 UTCVendor advisory
  41. 2026-06-28 04:56 UTCEPSS rescore
  42. 2026-06-28 04:56 UTCEPSS rescore
  43. 2026-06-27 21:58 UTCVendor advisory
  44. 2026-06-27 10:42 UTCVendor advisory
  45. 2026-06-27 03:08 UTCEPSS rescore
  46. 2026-06-26 23:26 UTCVendor advisory
  47. 2026-06-26 12:11 UTCVendor advisory
  48. 2026-06-25 23:15 UTCVendor advisory
  49. 2026-06-25 13:49 UTCEPSS rescore
  50. 2026-06-25 12:00 UTCVendor advisory
  51. 2026-06-25 00:45 UTCVendor advisory
  52. 2026-06-24 14:05 UTCEPSS rescore
  53. 2026-06-24 13:31 UTCVendor advisory
  54. 2026-06-24 02:09 UTCVendor advisory
  55. 2026-06-23 21:33 UTCEPSS rescore
  56. 2026-06-23 21:33 UTCEPSS rescore
  57. 2026-06-23 14:54 UTCVendor advisory
  58. 2026-06-23 03:15 UTCVendor advisory
  59. 2026-06-22 15:43 UTCVendor advisory
  60. 2026-06-22 14:25 UTCEPSS rescore
  61. 2026-06-22 14:25 UTCEPSS rescore
  62. 2026-06-22 04:07 UTCVendor advisory
  63. 2026-06-21 16:51 UTCVendor advisory
  64. 2026-06-21 14:56 UTCEPSS rescore
  65. 2026-06-21 14:56 UTCEPSS rescore
  66. 2026-06-21 04:50 UTCVendor advisory
  67. 2026-06-21 01:59 UTCEPSS rescore
  68. 2026-06-21 01:59 UTCEPSS rescore
  69. 2026-06-20 17:18 UTCVendor advisory
  70. 2026-06-20 06:02 UTCVendor advisory
  71. 2026-06-19 19:26 UTCEPSS rescore
  72. 2026-06-19 19:26 UTCEPSS rescore
  73. 2026-06-19 18:02 UTCVendor advisory
  74. 2026-06-19 06:06 UTCVendor advisory
  75. 2026-06-18 18:22 UTCVendor advisory

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Frequently asked(5)

What is CVE-2026-48043?
CVE-2026-48043 is a high vulnerability published on June 11, 2026. Netty is a network application framework for development of protocol servers and clients. In netty-codec-http2 prior to versions 4.1.135.Final and 4.2.15.Final, the DelegatingDecompressorFrameListener class orchestrates HTTP/2 decompression by embedding a per-stream EmbeddedChannel that runs the…
When was CVE-2026-48043 disclosed?
CVE-2026-48043 was first published in the National Vulnerability Database on June 11, 2026, with the most recent update on July 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-48043 actively exploited?
CVE-2026-48043 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 45.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-48043?
CVE-2026-48043 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-48043?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-48043, 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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