This is caused by a race condition in the server when handling RST_STREAM frames and GOAWAY frames sent by the client.
The race condition "resets" the HTTP2Flusher.terminated, previously set to a non-null value, to the null value, allowing entries to be enqueued in the flusher that however will never be processed. These unprocessed entries are the ones that would unblock the write-blocked threads.
Analysis
Analysis and contextual insights are available on OpenCVE Cloud.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Eclipse Foundation | Eclipse Jetty | unaffected |
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| Vendor | Product | Confidence | Versions | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Eclipse | Jetty | 95% |
|
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No vendor fix or workaround currently provided.
Additional remediation guidance may be available on OpenCVE Cloud.
Tracking
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Tue, 08 Sep 2026 14:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Title | HTTP/2 Race Condition Causing Server Denial of Service in Jetty |
Tue, 08 Sep 2026 13:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Eclipse
Eclipse jetty |
|
| Vendors & Products |
Eclipse
Eclipse jetty |
Tue, 08 Sep 2026 12:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A client may issue HTTP/2 requests to a Jetty server that result in blocking writes that are never unblocked, eventually causing all threads to be blocked and the whole server to become unresponsive. This is caused by a race condition in the server when handling RST_STREAM frames and GOAWAY frames sent by the client. The race condition "resets" the HTTP2Flusher.terminated, previously set to a non-null value, to the null value, allowing entries to be enqueued in the flusher that however will never be processed. These unprocessed entries are the ones that would unblock the write-blocked threads. | |
| Weaknesses | CWE-400 | |
| References |
| |
| Metrics |
cvssV4_0
|
MITRE
Status: PUBLISHED
Assigner: eclipse
Published:
Updated: 2026-09-08T12:28:51.669Z
Reserved: 2026-06-18T11:34:22.081Z
Link: CVE-2026-12611
Vulnrichment
No data.
NVD
Status : Deferred
Published: 2026-09-08T13:17:17.150
Modified: 2026-09-08T14:15:01.243
Link: CVE-2026-12611
Redhat
No data.
OpenCVE Enrichment
Updated: 2026-09-08T14:00:19Z
-
CWE-400
Uncontrolled Resource Consumption