CVE-2026-18924 - Vulnerability Details - OpenCVE

A flaw in libcurl's handling of HTTP/2 Server Push streams, when the parent
handle is set to share connections with other handles, can lead to
use-after-free in the cleanup process.

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00206.

Key SSVC decision points have not yet been added.

Vendors	Products
Curl Subscribe	Curl Subscribe

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors	Products
Curl Subscribe	Curl Subscribe

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://curl.se/docs/CVE-2026-18924.html
https://curl.se/docs/CVE-2026-18924.json
https://hackerone.com/reports/3916059

History

Sun, 06 Sep 2026 20:15:00 +0000

Type	Values Removed	Values Added
First Time appeared		Curl Curl curl
Weaknesses		CWE-416
Vendors & Products		Curl Curl curl

Sun, 06 Sep 2026 18:00:00 +0000

Type	Values Removed	Values Added
Description		A flaw in libcurl's handling of HTTP/2 Server Push streams, when the parent handle is set to share connections with other handles, can lead to use-after-free in the cleanup process.
Title		HTTP/2 server push UAF
References		https://curl.se/docs/CVE-2026-18924.html https://curl.se/docs/CVE-2026-18924.json https://hackerone.com/reports/3916059

Projects

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MITRE

Status: PUBLISHED

Assigner: curl

Published: 2026-09-06T17:47:27.820Z

Updated: 2026-09-06T17:47:27.820Z

Reserved: 2026-08-05T08:31:56.125Z

Link: CVE-2026-18924

Vulnrichment

No data.

NVD

Status : Received

Published: 2026-09-06T18:17:20.553

Modified: 2026-09-06T18:17:20.553

Link: CVE-2026-18924

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-09-06T20:00:06Z

Weaknesses

CWE-416

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"type": "finder"}, {"lang": "en", "value": "Daniel Stenberg", "type": "remediation developer"}]}}}

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"affected", "version": "7.50.0", "versionType": "semver"}, {"lessThanOrEqual": "7.49.1", "status": "affected", "version": "7.49.1", "versionType": "semver"}, {"lessThanOrEqual": "7.49.0", "status": "affected", "version": "7.49.0", "versionType": "semver"}, {"lessThanOrEqual": "7.48.0", "status": "affected", "version": "7.48.0", "versionType": "semver"}, {"lessThanOrEqual": "7.47.1", "status": "affected", "version": "7.47.1", "versionType": "semver"}, {"lessThanOrEqual": "7.47.0", "status": "affected", "version": "7.47.0", "versionType": "semver"}, {"lessThanOrEqual": "7.46.0", "status": "affected", "version": "7.46.0", "versionType": "semver"}, {"lessThanOrEqual": "7.45.0", "status": "affected", "version": "7.45.0", "versionType": "semver"}, {"lessThanOrEqual": "7.44.0", "status": "affected", "version": "7.44.0", "versionType": "semver"}]}], "source": "2499f714-1537-4658-8207-48ae4bb9eae9"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A flaw in libcurl's handling of HTTP/2 Server Push streams, when the parent\nhandle is set to share connections with other handles, can lead to\nuse-after-free in the cleanup process."}], "id": "CVE-2026-18924", "lastModified": "2026-09-06T18:17:20.553", "metrics": {}, "published": "2026-09-06T18:17:20.553", "references": [{"source": "2499f714-1537-4658-8207-48ae4bb9eae9", "url": "https://curl.se/docs/CVE-2026-18924.html"}, {"source": "2499f714-1537-4658-8207-48ae4bb9eae9", "url": "https://curl.se/docs/CVE-2026-18924.json"}, {"source": "2499f714-1537-4658-8207-48ae4bb9eae9", "url": "https://hackerone.com/reports/3916059"}], "sourceIdentifier": "2499f714-1537-4658-8207-48ae4bb9eae9", "vulnStatus": "Received"}