CVE-2026-100658

✕ Withdrawn — historical dataMEDIUMPre-NVD 5.3
5.3CVSS

Netty (io.netty:netty-codec-http) contains an unbounded per-connection queue in WebSocketServerExtensionHandler. The handler offers an entry to its per-channel validExtensions queue for every inbound HttpRequest, but polls an entry only when the application writes an HttpResponse, and the queue size is never bounded. A remote, unauthenticated peer can use HTTP/1.1 pipelining to send requests faster than the application produces responses — including plain non-upgrade HTTP requests to any path — causing the queue to grow without limit until the JVM exhausts heap memory and terminates with OutOfMemoryError. Because the affected handler is the base class of WebSocketServerCompressionHandler, any server that enables permessage-deflate is exposed on its plain HTTP port before any WebSocket upgrade completes and before any application-level authentication. Affected versions are 4.1.88.Final through 4.1.137.Final and 4.2.0.Final through 4.2.17.Final; the issue is fixed in 4.1.138.Final and 4.2.18.Final.

CVSS v3
5.3
EchelonGraph score
Not yet assessedThis CVE record was withdrawn by its numbering authority, so there is no vulnerability to rate.
EPSS PROB
—
EPSS %ILE
—
KEV
—Not applicable: this CVE ID was withdrawn

Published

September 26, 2026

Last Modified

September 28, 2026

References (2)

Frequently asked(4)

What is CVE-2026-100658?
CVE-2026-100658 is a rejected CVE ID: its record was withdrawn on September 28, 2026 and no longer describes a vulnerability. Reason given: This CVE ID has been rejected as a duplicate.
When was the CVE record for CVE-2026-100658 published?
The CVE record for CVE-2026-100658 was published on September 26, 2026. EchelonGraph's copy of the record carries a last-modified date of September 28, 2026; the record at its source may have been updated since.
What is the CVSS score of CVE-2026-100658?
CVE-2026-100658 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-100658?
There is nothing to remediate under CVE-2026-100658: it is a rejected (withdrawn) CVE ID and no longer describes a vulnerability.