CVE-2026-100655

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Source
https://cve.org/CVERecord?id=CVE-2026-100655
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-100655.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-100655
Aliases
  • GHSA-rmcw-9fcq-wjq7
Downstream
Published
2026-09-26T13:23:23Z
Modified
2026-09-28T03:48:30Z
Severity
  • 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
Netty before 4.1.138.Final Denial of Service via SpdySessionHandler
Details

Netty (io.netty:netty-codec-http) versions up to and including 4.1.137.Final and from 4.2.0.Final through 4.2.17.Final accept an unlimited number of concurrent remote-initiated SPDY streams: SpdySessionHandler defaults localConcurrentStreams to Integer.MAX_VALUE and exposes no API to change it. A remote peer that opens a SPDY connection and sends millions of SYN_STREAM frames with FLAG_FIN=0 causes the server to allocate unbounded heap and direct memory, eventually triggering a JVM OutOfMemoryError and crashing the service. Fixed in 4.1.138.Final and 4.2.18.Final.

Database specific 
{
    "cna_assigner":  "VulnCheck",
    "cwe_ids":  [
        "CWE-770"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100655.json"
}
References

Affected packages

Git / github.com/netty/netty

Affected ranges

Type
GIT
Repo
https://github.com/netty/netty
Events
Introduced
09e64d259c99be8b5b2a471a78f11e65eb82598a
Fixed
e0789d32c72f46fd2e7c99b6fdbbf7e2f4409e44
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "4.2.0.Final"
        },
        {
            "fixed":  "4.2.17.Final"
        }
    ],
    "source":  "DESCRIPTION"
}

Affected versions

netty-4.*
netty-4.2.0.Final
netty-4.2.1.Final
netty-4.2.10.Final
netty-4.2.11.Final
netty-4.2.12.Final
netty-4.2.13.Final
netty-4.2.14.Final
netty-4.2.15.Final
netty-4.2.16.Final
netty-4.2.2.Final
netty-4.2.3.Final
netty-4.2.4.Final
netty-4.2.5.Final
netty-4.2.6.Final
netty-4.2.7.Final
netty-4.2.8.Final
netty-4.2.9.Final

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-100655.json"