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CVE-2026-18924

HTTP/2 server push UAF

Published: Sep 6, 2026Updated: Sep 15, 2026 Sources: CVE List NVDCWE-416
9.1CRITICAL
NVD MITRE
EPSS Score
0.9%
Top 42.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-416

Affected Products

haxx
oss-project·SEaka haxx.se
curl
OSS Libraries
curl
oss-project·USaka libcurl, wcurl
curlLibraryLibrary
OSS Libraries / generic-library

Exploitability

Official Patch Available
Workaround Available
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Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://curl.se/docs/CVE-2026-18924.html
curl.se
https://curl.se/docs/CVE-2026-18924.json
curl.se
https://hackerone.com/reports/3916059
hackerone.com
News mentions
1

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