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.
History

Thu, 15 Oct 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 15 Oct 2026 16:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-362
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Fri, 09 Oct 2026 09:15:00 +0000

Type Values Removed Values Added
First Time appeared Go Standard Library
Go Standard Library net/http
Go Standard Library net/http2
Vendors & Products Go Standard Library
Go Standard Library net/http
Go Standard Library net/http2

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
Metrics threat_severity

None

cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate


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

cve-icon MITRE

Status: PUBLISHED

Assigner: Go

Published: 2026-10-08T22:54:00.230Z

Updated: 2026-10-15T15:46:39.417Z

Reserved: 2026-09-23T23:03:58.333Z

Link: CVE-2026-97032

cve-icon Vulnrichment

Updated: 2026-10-15T15:46:08.235Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-08T23:17:06.213

Modified: 2026-10-15T16:18:24.967

Link: CVE-2026-97032

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-08T22:54:00Z

Links: CVE-2026-97032 - Bugzilla