Summary
It was discovered that Libwebsockets incorrectly handled certain SSH
protocol messages in its SSH protocol handler. A remote attacker could
possibly use this issue to cause Libwebsockets to consume excessive
resources, resulting in a denial of service. (CVE-2026-10650)
It was discovered that Libwebsockets incorrectly handled certain malformed
CBOR data. A remote attacker could possibly use this issue to cause
Libwebsockets to crash, resulting in a denial of service, or execute
arbitrary code. This issue only affected Ubuntu 24.04 LTS and Ubuntu 26.04
LTS. (CVE-2026-78161)
Fixed packages 4
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · 26.04 LTS 26.04:LTS | libwebsockets | 4.3.5-3ubuntu1.1 |
| Ubuntu · Pro 20.04 LTS Pro:20.04:LTS | libwebsockets | 3.2.1-3ubuntu0.1~esm2 |
| Ubuntu · Pro 22.04 LTS Pro:22.04:LTS | libwebsockets | 4.0.20-2ubuntu1.1+esm1 |
| Ubuntu · Pro 24.04 LTS Pro:24.04:LTS | libwebsockets | 4.3.3-1.1ubuntu0.1~esm2 |
Vulnerabilities 2
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High 7.3
warmcat libwebsockets LECP CBOR Recording lecp.c report_raw_cbor out-of-bounds write
A vulnerability was found in warmcat libwebsockets 4.5.0. Impacted is the function report_raw_cbor of the file lib/misc/lecp.c of the component LECP CBOR Recording. The manipulation results in out-of-bounds write. The attack can be launched remotely. The expl…
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Medium 5.3
warmcat libwebsockets SSH Protocol sshd.c lws_ssh_parse_plaintext resource consumption
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 le…