Out-of-bounds write in libwebsockets - CVE-2025-11680
Published: November 3, 2025
Vulnerability identifier: #VU117945
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2025-11680
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: libwebsockets.org
Affected software:
libwebsockets
libwebsockets
Detailed vulnerability description
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a boundary error within the lws_upng_decode() function in lib/misc/upng.c. A remote attacker can trigger an out-of-bounds write and execute arbitrary code on the target system.
How to mitigate CVE-2025-11680
Install updates from vendor's website.