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CVE-2026-124040 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

Description

CivetWeb through 1.16, when built with USE_HTTP2 and enable_http2 on, contains a use-after-free vulnerability in handle_http2() that retains freed :method and :path pointers. Unauthenticated remote attackers can send a later HEADERS frame omitting these pseudo-headers to influence request method or path seen by access rules, or crash the server.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:8.2 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

CNA: [email protected]CVSS-B:8.1 HIGHVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/civetweb/civetweb	[email protected]	Source CodeVendor
https://github.com/civetweb/civetweb/blob/v1.16/src/http2.inl#L1574-L1581	[email protected]	Source CodeVendor
https://github.com/civetweb/civetweb/issues/1379	[email protected]	ExploitIssue TrackingTechnical DescriptionVendor
https://www.vulncheck.com/advisories/civetweb-through-1.16-http-2-use-after-free-via-stale-pseudo-header-state	[email protected]	AdvisoryRemedy

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-416	Use After Free	[email protected]

Affected Products

Product	Versions
CivetWeb	<= 1.16
CPE cpe:2.3:a:civetweb_project:civetweb:::::::: Remediation No remediation found in references.

Change History

1 change record found show changes