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.
Published: 2026-10-08
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

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

Subscriptions

Go Standard Library Net/http Net/http2
cve-icon MITRE

Status: PUBLISHED

Assigner: Go

Published:

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

cve-icon OpenCVE Enrichment

Updated: 2026-10-09T08:02:01Z

Weaknesses
  • CWE-362

    Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

  • CWE-366

    Race Condition within a Thread