Double free in cURL - CVE-2026-8925
Published: June 24, 2026
Vulnerability identifier: #VU135083
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-8925
CWE-ID: CWE-415
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: curl.haxx.se
Affected software:
cURL
cURL
Detailed vulnerability description
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to double free in the SASL authentication logic when processing SASL authentication with a malicious server response. A remote user can influence server behavior to trigger the double free and cause a denial of service.
Only builds using libgsasl are vulnerable, and the issue can be triggered over IMAP, POP3, and SMTP.
How to mitigate CVE-2026-8925
Install security update from vendor's website.