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 52% 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
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 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)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
48%
KEV
Not listed

Published

June 11, 2026

Last Modified

September 18, 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(16)

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

Patch Availability(8)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatnetty-codec-http22026-09-10redhat
redhatrhoai/odh-trustyai-service-rhel9:17881986812026-09-08redhat
redhateap7-wildfly-0:7.4.25-2.GA_redhat_00001.1.el7eap2026-08-11redhat
redhateap7-wildfly-0:7.4.25-2.GA_redhat_00001.1.el9eap2026-08-11redhat
redhateap7-wildfly-0:7.4.25-2.GA_redhat_00001.1.el8eap2026-08-11redhat
redhatcryostat/jfr-datasource-rhel9:4.2.0-132026-07-29redhat
redhatdevspaces/jetbrains-ide-rhel9:17848305522026-07-29redhat
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

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
netty1:4.1.48-10 ... 1:4.1.48-9 (16 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
netty1:4.1.48-10 ... 1:4.1.48-9 (12 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
netty1:4.1.48-10 ... 1:4.1.48-16 (8 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
netty1:4.1.48-10 ... 1:4.1.48-16 (7 versions)——
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.

Additional Vendor Advisories

(2)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 9× in last 7d / 46× 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 256 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

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 September 18, 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 1% probability of exploitation in the next 30 days, which ranks it in the top 51.9% of all scored CVEs.
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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-48043

Explore →

Is Your Infrastructure Affected by CVE-2026-48043?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs