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VulnerabilityPublished Updated

CVE-2026-93569: netty · CWE-444

Affects nettySource GCVE Database

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Authoritative record:CVE-2026-93569· High 8.2

Not known to be exploited · CVSS 8.2 High.

Data as of 7 Nov 2026, 23:24 UTC

CVSS 3.1 base score
8.2High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (redhat)CVSS 3.18.2
EPSS
2.4% chance of exploitation in 30 days – higher than 84% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 18 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 8 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Ubuntu 26.10nettypkg:deb/ubuntu/netty?arch=source&distro=stonkingOther threatsAffected
  • =1:4.1.48-16
  • =1:4.1.48-16ubuntu1
Fixed in–
Ubuntu Pro 26.04 LTSnettypkg:deb/ubuntu/netty?arch=source&distro=esm-apps/resoluteOther threatsAffected
  • 1:4.1.48-10 – 1:4.1.48-16ubuntu0.1~esm2
7 affected builds
Fixed in–
Ubuntu Pro 24.04 LTSnettypkg:deb/ubuntu/netty?arch=source&distro=esm-apps/nobleOther threatsAffected
  • 1:4.1.48-7 – 1:4.1.48-9ubuntu0.2+esm2
11 affected builds
Fixed in–
Ubuntu Pro 22.04 LTSnettypkg:deb/ubuntu/netty?arch=source&distro=esm-apps/jammyOther threatsAffected
  • 1:4.1.48-4 – 1:4.1.48-4+deb11u2ubuntu0.2+esm1
10 affected builds
Fixed in–
Ubuntu Pro 20.04 LTSnettypkg:deb/ubuntu/netty?arch=source&distro=esm-apps/focalOther threatsAffected
  • 1:4.1.33-1 – 1:4.1.45-1ubuntu0.1~esm7
10 affected builds
Fixed in–
Ubuntu Pro 18.04 LTSnettypkg:deb/ubuntu/netty?arch=source&distro=esm-apps/bionicOther threatsAffected
  • 1:4.1.7-4 – 1:4.1.7-4ubuntu0.1~esm1
10 affected builds
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A security update is available from Red Hat in the Red Hat build of Quarkus 3.33.3.SP2 release that addresses this vulnerability. Users should apply this official update to remediate the issue. Prior to applying this update, ensure all previously released relevant errata have been applied. No other specific mitigations are indicated by the vendor advisory.

Description

CVE-2026-93569 is a vulnerability in Netty's HTTP/1 to HTTP/2 conversion process affecting certain versions of Red Hat Build of Apache Camel. The flaw occurs when an HTTP/1 request contains both an absolute-form request-target and a conflicting Host header; Netty incorrectly prioritizes the Host header for the HTTP/2 :authority field, discarding the original request-target authority. This can lead to unauthorized access, cache poisoning, or misrouting of requests in Netty-based proxies or gateways. A security update addressing this and other vulnerabilities is available in Red Hat build of Quarkus 3.33.3.SP2.

References

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