CVE-2025-11679

MEDIUM EPSS 27.5%

Published Oct 20, 20258mo ago · Modified Jun 17, 20262w ago

5.9 CVSS 4.0

Medium

Published Oct 20, 2025 8mo ago

Last Modified Jun 17, 2026 2w ago

Description

Out-of-bounds Read in lws_upng_emit_next_line in warmcat libwebsockets allows, when the LWS_WITH_UPNG flag is enabled during compilation and the HTML display stack is used, to read past a heap allocated buffer possibly causing a crash, when the user visits an attacker controlled website that contains a crafted PNG file with a big height dimension.

CVSS Details

Base Score

5.9

Exploitability

—

Impact

—

Vector string

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector Network

Attack Complexity High

Privileges Required None

User Interaction A

Scope X

Threat Intelligence

EPSS Exploit Probability

27.5% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-125 Out-of-bounds Read Memory Safety

References 2

libwebsockets.org https://libwebsockets.org/git/libwebsockets/commit?id=7df24cca7144d7bc9233b6b0a71108bd154ce101
nozominetworks.com https://www.nozominetworks.com/labs/vulnerability-advisories-cve-2025-11679

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.