HTTP/2 servers could end up crashing due to inadvertently modifying its HPACK encoder concurrently. This happens because the server modifies the HPACK encoder from two goroutines without synchronization: one uses the encoder to encode a HEADERS frame as part of a response sent to a client and the other modifies the encoder's table size when handling a SETTINGS frame containing SETTINGS_HEADER_TABLE_SIZE that a client sends. A malicious client can repeatedly send a request while changing the header table size to crash the server.
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Fixes
Solution
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Workaround
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References
History
Fri, 09 Oct 2026 02:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-362 |
Fri, 09 Oct 2026 00:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-362 |
Fri, 09 Oct 2026 00:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-366 | |
| References |
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| Metrics |
threat_severity
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cvssV3_1
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Thu, 08 Oct 2026 23:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | HTTP/2 servers could end up crashing due to inadvertently modifying its HPACK encoder concurrently. This happens because the server modifies the HPACK encoder from two goroutines without synchronization: one uses the encoder to encode a HEADERS frame as part of a response sent to a client and the other modifies the encoder's table size when handling a SETTINGS frame containing SETTINGS_HEADER_TABLE_SIZE that a client sends. A malicious client can repeatedly send a request while changing the header table size to crash the server. | |
| Title | HTTP/2 server crash due to HPACK encoder race in net/http | |
| References |
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Status: PUBLISHED
Assigner: Go
Published:
Updated: 2026-10-08T22:54:00.230Z
Reserved: 2026-09-23T23:03:58.333Z
Link: CVE-2026-97032
No data.
Status : Received
Published: 2026-10-08T23:17:06.213
Modified: 2026-10-08T23:17:06.213
Link: CVE-2026-97032
OpenCVE Enrichment
Updated: 2026-10-09T03:30:06Z
Weaknesses