{"id":"CVE-2026-10650","aliases":["BELL-CVE-2026-10650","DEBIAN-CVE-2026-10650","EUVD-2026-34034","GHSA-23jv-8gf4-7r88","MGASA-2026-0442","OESA-2026-2668","UBUNTU-CVE-2026-10650","USN-8822-1"],"status":"published","title":"warmcat libwebsockets SSH Protocol sshd.c lws_ssh_parse_plaintext resource consumption","description":"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.","severity":{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00429,"percentile":0.37598,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-400","CWE-404"],"published":"2026-06-02T21:15:10Z","modified":"2026-10-28T11:03:52Z","fixes":[{"ecosystem":"Debian:13","package":"libwebsockets","fixed_in":["4.3.5-1+deb13u2"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"libwebsockets","fixed_in":["4.3.5-5"],"sources":["osv"]},{"ecosystem":"Mageia:10","package":"libwebsockets","fixed_in":["4.5.2-1.1.mga10"],"sources":["osv"]},{"ecosystem":"Mageia:9","package":"libwebsockets","fixed_in":["4.3.2-1.1.mga9"],"sources":["osv"]},{"ecosystem":"openEuler:20.03-LTS-SP4","package":"libwebsockets","fixed_in":["4.3.0-8.oe2003sp4"],"sources":["osv"]},{"ecosystem":"openEuler:22.03-LTS-SP4","package":"libwebsockets","fixed_in":["4.3.0-8.oe2203sp4"],"sources":["osv"]},{"ecosystem":"openEuler:24.03-LTS-SP1","package":"libwebsockets","fixed_in":["4.3.3-5.oe2403sp1"],"sources":["osv"]},{"ecosystem":"openEuler:24.03-LTS-SP3","package":"libwebsockets","fixed_in":["4.3.3-5.oe2403sp3"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:20.04:LTS","package":"libwebsockets","fixed_in":["3.2.1-3ubuntu0.1~esm2"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:22.04:LTS","package":"libwebsockets","fixed_in":["4.0.20-2ubuntu1.1+esm1"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:24.04:LTS","package":"libwebsockets","fixed_in":["4.3.3-1.1ubuntu0.1~esm2"],"sources":["osv"]},{"ecosystem":"Ubuntu:26.04:LTS","package":"libwebsockets","fixed_in":["4.3.5-3ubuntu1.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"libwebsockets","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.1.6-3","4.1.6-3.1","4.3.2-1","4.3.2-2","4.3.2-3","4.3.2-4","4.3.3-1","4.3.3-1.1","4.3.3-1.1~exp1","4.3.5-1","4.3.5-2","4.3.5-3","4.3.5-4","4.3.5-4.1","4.3.5-5","4.3.5-6","4.3.5-7"]},{"source":"osv","ecosystem":"Debian:13","package":"libwebsockets","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.5-1+deb13u2"}]}],"versions":["4.3.5-1","4.3.5-1+deb13u1"]},{"source":"osv","ecosystem":"Debian:14","package":"libwebsockets","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.5-5"}]}],"versions":["4.3.5-1","4.3.5-2","4.3.5-3","4.3.5-4","4.3.5-4.1"]},{"source":"osv","ecosystem":"Mageia:10","package":"libwebsockets","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.5.2-1.1.mga10"}]}]},{"source":"osv","ecosystem":"Mageia:9","package":"libwebsockets","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.2-1.1.mga9"}]}]},{"source":"osv","ecosystem":"openEuler:20.03-LTS-SP4","package":"libwebsockets","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.0-8.oe2003sp4"}]}]},{"source":"osv","ecosystem":"openEuler:22.03-LTS-SP4","package":"libwebsockets","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.0-8.oe2203sp4"}]}]},{"source":"osv","ecosystem":"openEuler:24.03-LTS-SP1","package":"libwebsockets","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.3-5.oe2403sp1"}]}]},{"source":"osv","ecosystem":"openEuler:24.03-LTS-SP3","package":"libwebsockets","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.3-5.oe2403sp3"}]}]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"libwebsockets","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.1-3ubuntu0.1~esm2"}]}],"versions":["2.0.3-3build1","3.2.1-3","3.2.1-3ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"libwebsockets","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.0.20-2ubuntu1.1+esm1"}]}],"versions":["4.0.20-2","4.0.20-2ubuntu1","4.0.20-2ubuntu1.1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:24.04:LTS","package":"libwebsockets","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.3-1.1ubuntu0.1~esm2"}]}],"versions":["4.3.2-4","4.3.3-1","4.3.3-1.1build1","4.3.3-1.1build2","4.3.3-1.1build3","4.3.3-1.1ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"libwebsockets","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.3.5-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"libwebsockets","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.5-3ubuntu1.1"}]}],"versions":["4.3.5-1","4.3.5-3","4.3.5-3ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"libwebsockets","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.1-3ubuntu0.1~esm2"}]}],"versions":["2.0.3-3build1","3.2.1-3","3.2.1-3ubuntu0.1~esm1"],"bundled":2},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"libwebsockets","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.0.20-2ubuntu1.1+esm1"}]}],"versions":["4.0.20-2","4.0.20-2ubuntu1","4.0.20-2ubuntu1.1"],"bundled":2},{"source":"osv","ecosystem":"Ubuntu:Pro:24.04:LTS","package":"libwebsockets","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.3-1.1ubuntu0.1~esm2"}]}],"versions":["4.3.2-4","4.3.3-1","4.3.3-1.1build1","4.3.3-1.1build2","4.3.3-1.1build3","4.3.3-1.1ubuntu0.1~esm1"],"bundled":2},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"libwebsockets","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.5-3ubuntu1.1"}]}],"versions":["4.3.5-1","4.3.5-3","4.3.5-3ubuntu1"],"bundled":2}],"products":[{"vendor":"warmcat","product":"libwebsockets"}],"references":[{"url":"https://vuldb.com/vuln/367955","tags":["vdb-entry","technical-description","advisory"]},{"url":"https://vuldb.com/vuln/367955/cti","tags":["signature","permissions-required","report"]},{"url":"https://vuldb.com/cve/CVE-2026-10650","tags":["third-party-advisory","advisory"]},{"url":"https://vuldb.com/submit/830261","tags":["third-party-advisory","advisory"]},{"url":"https://github.com/biniamf/pocs/tree/main/libwebsockets_sshd-parse-ic-unbounded-alloc","tags":["exploit","evidence","web"]},{"url":"https://github.com/biniamf/pocs/blob/main/libwebsockets_sshd-parse-ic-unbounded-alloc/poc_sshd_unbounded_alloc.py","tags":["exploit","evidence"]},{"url":"https://github.com/warmcat/libwebsockets/commit/3f9f0c6ecaf0e6f3f219d30632c5d1f2479d7498","tags":["patch","fix"]},{"url":"https://github.com/warmcat/libwebsockets/","tags":["product","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-10650","tags":["advisory"]},{"url":"https://github.com/warmcat/libwebsockets"},{"url":"https://github.com/advisories/GHSA-23jv-8gf4-7r88","tags":["advisory"]},{"url":"https://docs.bell-sw.com/security/cves/CVE-2026-10650","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/10xxx/CVE-2026-10650.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-10650","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2026-0442.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=36157","tags":["report"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KMAEZLLRGAX46TX4KZNYWZXYVIWBF3RU/","tags":["web"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2668","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-10650","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-10650","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-8822-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-78161","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-10650","title":"warmcat libwebsockets SSH Protocol sshd.c lws_ssh_parse_plaintext resource consumption","description":"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.","status":"published","published":"2026-06-02T21:15:10.566Z","modified":"2026-06-03T14:04:31.919Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","level":"medium","assessor":"cna"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C","level":"medium","assessor":"cna"},{"version":"3.0","score":5.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C","level":"medium","assessor":"cna"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:OF/RC:C","assessor":"cna"}],"cwes":["CWE-400","CWE-404"],"updated_at":"2026-11-02T13:40:12.486331Z"}],"euvd":[{"id":"EUVD-2026-34034","description":"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.","status":"published","published":"2026-06-02T21:15:10Z","modified":"2026-06-03T14:04:31Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","level":"medium"}],"updated_at":"2026-11-02T18:20:54.253343Z"}],"ghsa":[{"id":"GHSA-23jv-8gf4-7r88","title":"A flaw has been found in warmcat libwebsockets up to 4.5.8. This issue affects the function...","description":"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.","status":"published","published":"2026-06-03T00:30:25Z","modified":"2026-06-03T00:30:32Z","cvss":[{"version":"4.0","score":5.5,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/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","level":"medium"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T15:08:30.717444Z"}],"nvd":[{"id":"CVE-2026-10650","description":"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.","status":"published","published":"2026-06-02T22:16:16.293Z","modified":"2026-07-22T19:10:00.12Z","cvss":[{"version":"4.0","score":5.5,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/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","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"secondary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"secondary"}],"cwes":["CWE-400","CWE-404"],"updated_at":"2026-11-02T14:12:22.022466Z"}],"osv":[{"id":"BELL-CVE-2026-10650","title":"CVE-2026-10650 does not affect BellSoft software","status":"withdrawn","published":"2026-06-05T06:11:25.870225Z","modified":"2026-06-20T07:15:04.857770972Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:28:23.037038Z"},{"id":"CVE-2026-10650","title":"warmcat libwebsockets SSH Protocol sshd.c lws_ssh_parse_plaintext resource consumption","description":"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.","status":"published","published":"2026-06-02T21:15:10.566Z","modified":"2026-10-28T11:03:52.143187363Z","cvss":[{"version":"4.0","score":5.5,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","level":"medium"}],"cwes":["CWE-400","CWE-404"],"updated_at":"2026-11-02T15:44:54.583213Z"},{"id":"DEBIAN-CVE-2026-10650","description":"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.","status":"published","published":"2026-06-02T22:16:16.293Z","modified":"2026-10-01T03:00:39.229273242Z","cvss":[{"version":"4.0","score":5.5,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/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","level":"medium"}],"updated_at":"2026-11-02T15:45:49.381767Z"},{"id":"OESA-2026-2668","title":"libwebsockets security update","description":"Libwebsockets (LWS) is a flexible, lightweight pure C library for implementing modern network protocols easily with a tiny footprint, using a nonblocking event loop.\r\n\r\nSecurity Fix(es):\n\nA 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.(CVE-2026-10650)","status":"published","published":"2026-06-12T11:11:36Z","modified":"2026-08-18T01:20:04.856653074Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:52:46.449097Z"},{"id":"UBUNTU-CVE-2026-10650","description":"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.","status":"published","published":"2026-06-02T22:16:00Z","modified":"2026-09-28T11:30:25.459585227Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"},{"version":"4.0","score":5.5,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","level":"medium"}],"updated_at":"2026-11-02T16:55:59.130573Z"},{"id":"MGASA-2026-0442","title":"Updated libwebsockets packages fix a security vulnerability","description":"warmcat libwebsockets SSH Protocol sshd.c lws_ssh_parse_plaintext\nresource consumption. (CVE-2026-10650)\n","status":"published","published":"2026-09-23T23:49:21Z","modified":"2026-09-24T00:00:03.34343278Z","updated_at":"2026-11-02T15:49:43.795591Z"},{"id":"USN-8822-1","title":"libwebsockets vulnerabilities","description":"It was discovered that Libwebsockets incorrectly handled certain SSH\nprotocol messages in its SSH protocol handler. A remote attacker could\npossibly use this issue to cause Libwebsockets to consume excessive\nresources, resulting in a denial of service. (CVE-2026-10650)\n\nIt was discovered that Libwebsockets incorrectly handled certain malformed\nCBOR data. A remote attacker could possibly use this issue to cause\nLibwebsockets to crash, resulting in a denial of service, or execute\narbitrary code. This issue only affected Ubuntu 24.04 LTS and Ubuntu 26.04\nLTS. (CVE-2026-78161)","status":"published","published":"2026-09-25T02:39:11Z","modified":"2026-09-28T11:42:43.847664856Z","updated_at":"2026-11-02T16:58:26.907654Z"}]}}