CVE-2026-18924
Published:September 02, 2026
Updated:September 02, 2026
libcurl HTTP/2 server push use-after-free: when the parent handle is set to share connections with other handles, handling of HTTP/2 server push streams can lead to a use-after-free during cleanup. Requires HTTP/2 push enabled, connection sharing configured and server push accepted. Affects libcurl only, not the curl tool. Affects curl 7.44.0 through 8.21.0, fixed in 8.22.0.
Affected Packages
libcurl (CONAN):
Affected version(s) >=7.76.0 <8.22.0Fix Suggestion:
Update to version 8.22.0https://github.com/curl/curl.git (GITHUB):
Affected version(s) >=curl-7_44_0 <curl-8_22_0Fix Suggestion:
Update to version curl-8_22_0Related Resources (2)
Do you need more information?
Contact UsCVSS v4
Base Score:
6.3
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
3.7
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Weakness Type (CWE)
Use After Free