Threat Intelligence Database

A vulnerability in warmcat libwebsockets 4.5.0 affects the function report_raw_cbor in the LECP CBOR Recording component, causing an out-of-bounds write. This flaw can be exploited remotely without authentication. A patch has been identified to fix the issue. The vulnerability has a CVSS score of 7.3, indicating a medium severity level.

CVE-2026-78161 is an out-of-bounds write vulnerability in warmcat libwebsockets version 4.5.0. The flaw exists in the report_raw_cbor function within the LECP CBOR Recording component. This vulnerability can be exploited remotely without authentication. A patch has been identified to address this issue. The CVSS 4.0 base score is 6.9, indicating a medium severity level.

A flaw has been found in warmcat libwebsockets up to 4.5.8. This issue affects the function lws_ssh_parse_plaintext of the file plugins/protocol_lws_ssh_base/sshd.c of the component SSH Protocol Handler. Executing a manipulation of the argument msg_len can lead to resource consumption. The attack may be launched remotely. The exploit has been published and may be used. This patch is called 3f9f0c6ecaf0e6f3f219d30632c5d1f2479d7498. A patch should be applied to remediate this issue.

Out-of-bounds Write in unfilter_scanline in warmcat libwebsockets allows, when the LWS_WITH_UPNG flag is enabled during compilation and the HTML display stack is used, to write 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 width value that causes an integer overflow which value is used for determining the size of a heap allocation.

MediumVulnerabilityGermanyFranceUnited Kingdom+5#cve#cve-2025-11680#cwe-787

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.

MediumVulnerabilityGermanyFranceUnited Kingdom+3#cve#cve-2025-11679#cwe-125

Stack-based Buffer Overflow in lws_adns_parse_label in warmcat libwebsockets allows, when the LWS_WITH_SYS_ASYNC_DNS flag is enabled during compilation, to overflow the label_stack, when the attacker is able to sniff a DNS request in order to craft a response with a matching id containing a label longer than the maximum.

HighVulnerabilityGermanyFranceUnited Kingdom+3#cve#cve-2025-11678#cwe-121

Use After Free in WebSocket server implementation in lws_handshake_server in warmcat libwebsockets may allow an attacker, in specific configurations where the user provides a callback function that handles LWS_CALLBACK_HTTP_CONFIRM_UPGRADE, to achieve denial of service.

MediumVulnerabilityGermanyFranceUnited Kingdom+5#cve#cve-2025-11677#cwe-416