CVE-2026-93568

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-18. A secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
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: 0.6%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw was found in Netty. A remote attacker could exploit this vulnerability by sending specially crafted HTTP/2 or HTTP/3 Extended CONNECT requests. Netty's HTTP-object conversion path incorrectly processes these requests as regular HTTP/1.1 CONNECT requests, leading to a loss of critical protocol and path information. This misinterpretation can allow attackers to bypass security policies, such as routing or authorization logic, in applications that rely on Netty for HTTP/2 or HTTP/3 communication, resulting in integrity loss.

CVSS v3
7.5
EG Score
7.5HIGHhigh confidence
EG Risk
49
EG Risk 49/100CISA SSVC

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%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.6%
EPSS %ILE
44th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 18, 2026

Last Modified

September 22, 2026

Advisory Details (2)

Auto-updated Sep 18, 2026
Patch available. Sources: redhat.
redhat

2536961 – (CVE-2026-93568) CVE-2026-93568 io.netty/netty-codec-http2: io.netty/netty-codec-http3: Netty: HTTP/2 and HTTP/3 Extended CONNECT requests are downgraded as regular CONNECT requests

https://bugzilla.redhat.com/show_bug.cgi?id=2536961
redhat Patch Available

CVE-2026-93568 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-93568

Vendor Advisories for CVE-2026-93568(1)

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

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
netty1:4.1.48-10 ... 1:4.1.48-9 (12 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
netty1:4.1.48-10 ... 1:4.1.48-16 (8 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
netty1:4.1.48-10 ... 1:4.1.48-16 (7 versions)
  • every version on: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 29× in last 7d / 81× 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. 2026-10-04 23:43 UTCEG score recompute
  2. 2026-10-04 23:43 UTCGHSA enrichment
  3. 2026-10-04 23:23 UTCEPSS rescore
  4. 2026-10-04 12:32 UTCGHSA enrichment
  5. 2026-10-04 01:20 UTCEG score recompute
  6. 2026-10-04 01:20 UTCGHSA enrichment
  7. 2026-10-03 14:26 UTCEPSS rescore
  8. 2026-10-03 14:08 UTCGHSA enrichment
  9. 2026-10-03 02:56 UTCEG score recompute
  10. 2026-10-03 02:56 UTCGHSA enrichment
  11. 2026-10-02 15:45 UTCGHSA enrichment
  12. 2026-10-02 04:34 UTCEG score recompute
  13. 2026-10-02 04:34 UTCGHSA enrichment
  14. 2026-10-01 19:51 UTCEPSS rescore
  15. 2026-10-01 17:04 UTCGHSA enrichment
  16. 2026-10-01 05:27 UTCGHSA enrichment
  17. 2026-09-30 18:15 UTCEG score recompute
  18. 2026-09-30 18:14 UTCGHSA enrichment
  19. 2026-09-30 15:04 UTCEPSS rescore
  20. 2026-09-30 06:54 UTCGHSA enrichment
  21. 2026-09-29 19:42 UTCEG score recompute
  22. 2026-09-29 19:42 UTCGHSA enrichment
  23. 2026-09-29 08:29 UTCEG score recompute
  24. 2026-09-29 08:29 UTCGHSA enrichment
  25. 2026-09-28 21:18 UTCEG score recompute
Show 56 more
  1. 2026-09-28 21:18 UTCGHSA enrichment
  2. 2026-09-28 13:52 UTCEPSS rescore
  3. 2026-09-28 13:52 UTCEPSS rescore
  4. 2026-09-28 10:07 UTCGHSA enrichment
  5. 2026-09-27 22:52 UTCEG score recompute
  6. 2026-09-27 22:52 UTCGHSA enrichment
  7. 2026-09-27 13:49 UTCEPSS rescore
  8. 2026-09-27 11:40 UTCGHSA enrichment
  9. 2026-09-27 00:23 UTCEG score recompute
  10. 2026-09-27 00:23 UTCGHSA enrichment
  11. 2026-09-26 15:59 UTCEPSS rescore
  12. 2026-09-26 13:12 UTCGHSA enrichment
  13. 2026-09-26 01:59 UTCEG score recompute
  14. 2026-09-26 01:58 UTCGHSA enrichment
  15. 2026-09-25 14:44 UTCGHSA enrichment
  16. 2026-09-25 03:32 UTCGHSA enrichment
  17. 2026-09-24 16:21 UTCEG score recompute
  18. 2026-09-24 16:21 UTCGHSA enrichment
  19. 2026-09-24 14:04 UTCEPSS rescore
  20. 2026-09-24 05:10 UTCGHSA enrichment
  21. 2026-09-23 17:58 UTCEG score recompute
  22. 2026-09-23 17:58 UTCGHSA enrichment
  23. 2026-09-23 17:54 UTCEPSS rescore
  24. 2026-09-23 06:47 UTCGHSA enrichment
  25. 2026-09-22 19:36 UTCEG score recompute
  26. 2026-09-22 19:36 UTCGHSA enrichment
  27. 2026-09-22 18:59 UTCEG score recompute
  28. 2026-09-22 18:59 UTCGHSA enrichment
  29. 2026-09-22 16:01 UTCEPSS rescore
  30. 2026-09-22 15:49 UTCGHSA enrichment
  31. 2026-09-22 04:38 UTCEG score recompute
  32. 2026-09-22 04:38 UTCGHSA enrichment
  33. 2026-09-21 21:09 UTCEPSS rescore
  34. 2026-09-21 17:26 UTCEG score recompute
  35. 2026-09-21 17:26 UTCGHSA enrichment
  36. 2026-09-21 16:50 UTCEG score recompute
  37. 2026-09-21 16:50 UTCGHSA enrichment
  38. 2026-09-21 05:25 UTCEG score recompute
  39. 2026-09-21 05:25 UTCGHSA enrichment
  40. 2026-09-20 20:16 UTCEPSS rescore
  41. 2026-09-20 18:13 UTCGHSA enrichment
  42. 2026-09-20 07:02 UTCGHSA enrichment
  43. 2026-09-19 19:51 UTCEG score recompute
  44. 2026-09-19 19:51 UTCGHSA enrichment
  45. 2026-09-19 08:40 UTCGHSA enrichment
  46. 2026-09-18 21:28 UTCGHSA enrichment
  47. 2026-09-18 19:27 UTCGHSA enrichment
  48. 2026-09-18 19:07 UTCEG score recompute
  49. 2026-09-18 19:07 UTCGHSA enrichment
  50. 2026-09-18 18:49 UTCEG score recompute
  51. 2026-09-18 18:49 UTCGHSA enrichment
  52. 2026-09-18 16:27 UTCEG score recompute
  53. 2026-09-18 16:27 UTCGHSA enrichment
  54. 2026-09-18 15:24 UTCEG score recompute
  55. 2026-09-18 14:44 UTCEG score recompute
  56. 2026-09-18 14:44 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-93568?
CVE-2026-93568 is a high vulnerability published on September 18, 2026. A flaw was found in Netty. A remote attacker could exploit this vulnerability by sending specially crafted HTTP/2 or HTTP/3 Extended CONNECT requests. Netty's HTTP-object conversion path incorrectly processes these requests as regular HTTP/1.1 CONNECT requests, leading to a loss of critical…
When was CVE-2026-93568 disclosed?
CVE-2026-93568 was first published on September 18, 2026, with the most recent update on September 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-93568 actively exploited?
CVE-2026-93568 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (44th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-93568?
CVE-2026-93568 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-93568?
A fix for CVE-2026-93568 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-93568 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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