Vulnerability-Lookup

OESA-2026-2668 (CVE-2026-10650)

Vulnerability from osv_openeuler – Published: 2026-06-12 11:11 – Updated: 2026-08-06 11:11 – Source website

Summary

libwebsockets security update

Details

Libwebsockets (LWS) is a flexible, lightweight pure C library for implementing modern network protocols easily with a tiny footprint, using a nonblocking event loop.

Security Fix(es):

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.(CVE-2026-10650)

Severity

5.3 (Medium)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-10650	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "libwebsockets-4.3.0-8.oe2003sp4.aarch64.rpm",
          "libwebsockets-debuginfo-4.3.0-8.oe2003sp4.aarch64.rpm",
          "libwebsockets-debugsource-4.3.0-8.oe2003sp4.aarch64.rpm",
          "libwebsockets-devel-4.3.0-8.oe2003sp4.aarch64.rpm"
        ],
        "noarch": [
          "libwebsockets-help-4.3.0-8.oe2003sp4.noarch.rpm"
        ],
        "src": [
          "libwebsockets-4.3.0-8.oe2003sp4.src.rpm"
        ],
        "x86_64": [
          "libwebsockets-4.3.0-8.oe2003sp4.x86_64.rpm",
          "libwebsockets-debuginfo-4.3.0-8.oe2003sp4.x86_64.rpm",
          "libwebsockets-debugsource-4.3.0-8.oe2003sp4.x86_64.rpm",
          "libwebsockets-devel-4.3.0-8.oe2003sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP4",
        "name": "libwebsockets",
        "purl": "pkg:rpm/openEuler/libwebsockets\u0026distro=openEuler-20.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.3.0-8.oe2003sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "libwebsockets-4.3.0-8.oe2203sp4.aarch64.rpm",
          "libwebsockets-debuginfo-4.3.0-8.oe2203sp4.aarch64.rpm",
          "libwebsockets-debugsource-4.3.0-8.oe2203sp4.aarch64.rpm",
          "libwebsockets-devel-4.3.0-8.oe2203sp4.aarch64.rpm"
        ],
        "noarch": [
          "libwebsockets-help-4.3.0-8.oe2203sp4.noarch.rpm"
        ],
        "src": [
          "libwebsockets-4.3.0-8.oe2203sp4.src.rpm"
        ],
        "x86_64": [
          "libwebsockets-4.3.0-8.oe2203sp4.x86_64.rpm",
          "libwebsockets-debuginfo-4.3.0-8.oe2203sp4.x86_64.rpm",
          "libwebsockets-debugsource-4.3.0-8.oe2203sp4.x86_64.rpm",
          "libwebsockets-devel-4.3.0-8.oe2203sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS-SP4",
        "name": "libwebsockets",
        "purl": "pkg:rpm/openEuler/libwebsockets\u0026distro=openEuler-22.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.3.0-8.oe2203sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "libwebsockets-4.3.3-5.oe2403sp1.aarch64.rpm",
          "libwebsockets-debuginfo-4.3.3-5.oe2403sp1.aarch64.rpm",
          "libwebsockets-debugsource-4.3.3-5.oe2403sp1.aarch64.rpm",
          "libwebsockets-devel-4.3.3-5.oe2403sp1.aarch64.rpm"
        ],
        "noarch": [
          "libwebsockets-help-4.3.3-5.oe2403sp1.noarch.rpm"
        ],
        "src": [
          "libwebsockets-4.3.3-5.oe2403sp1.src.rpm"
        ],
        "x86_64": [
          "libwebsockets-4.3.3-5.oe2403sp1.x86_64.rpm",
          "libwebsockets-debuginfo-4.3.3-5.oe2403sp1.x86_64.rpm",
          "libwebsockets-debugsource-4.3.3-5.oe2403sp1.x86_64.rpm",
          "libwebsockets-devel-4.3.3-5.oe2403sp1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP1",
        "name": "libwebsockets",
        "purl": "pkg:rpm/openEuler/libwebsockets\u0026distro=openEuler-24.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.3.3-5.oe2403sp1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "libwebsockets-4.3.3-5.oe2403sp3.aarch64.rpm",
          "libwebsockets-debuginfo-4.3.3-5.oe2403sp3.aarch64.rpm",
          "libwebsockets-debugsource-4.3.3-5.oe2403sp3.aarch64.rpm",
          "libwebsockets-devel-4.3.3-5.oe2403sp3.aarch64.rpm"
        ],
        "noarch": [
          "libwebsockets-help-4.3.3-5.oe2403sp3.noarch.rpm"
        ],
        "src": [
          "libwebsockets-4.3.3-5.oe2403sp3.src.rpm"
        ],
        "x86_64": [
          "libwebsockets-4.3.3-5.oe2403sp3.x86_64.rpm",
          "libwebsockets-debuginfo-4.3.3-5.oe2403sp3.x86_64.rpm",
          "libwebsockets-debugsource-4.3.3-5.oe2403sp3.x86_64.rpm",
          "libwebsockets-devel-4.3.3-5.oe2403sp3.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP3",
        "name": "libwebsockets",
        "purl": "pkg:rpm/openEuler/libwebsockets\u0026distro=openEuler-24.03-LTS-SP3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.3.3-5.oe2403sp3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "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)",
  "id": "OESA-2026-2668",
  "modified": "2026-08-06T11:11:36Z",
  "published": "2026-06-12T11:11:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2668"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-10650"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "libwebsockets security update",
  "upstream": [
    "CVE-2026-10650"
  ]
}

CVE-2026-10650 (GCVE-0-2026-10650)

Vulnerability from cvelistv5 – Published: 2026-06-02 21:15 – Updated: 2026-06-03 14:04 X_Open Source

Title

warmcat libwebsockets SSH Protocol sshd.c lws_ssh_parse_plaintext resource consumption

Summary

Severity

6.9 (Medium)


                        
                          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

5.3 (Medium)


                        
                          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

5.3 (Medium)


                        
                          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

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-03 14:04 UTC

CWE

CWE-400 - Resource Consumption
CWE-404 - Denial of Service

Assigner

VulDB mitre root

References

8 references

URL	Tags
https://vuldb.com/vuln/367955	vdb-entrytechnical-description
https://vuldb.com/vuln/367955/cti	signaturepermissions-required
https://vuldb.com/cve/CVE-2026-10650	third-party-advisory
https://vuldb.com/submit/830261	third-party-advisory
https://github.com/biniamf/pocs/tree/main/libwebs…	exploit
https://github.com/biniamf/pocs/blob/main/libwebs…	exploit
https://github.com/warmcat/libwebsockets/commit/3…	patch
https://github.com/warmcat/libwebsockets/	product

Impacted products

1 product

Vendor	Product	Version
warmcat	libwebsockets	Affected: 4.5.0 Affected: 4.5.1 Affected: 4.5.2 Affected: 4.5.3 Affected: 4.5.4 Affected: 4.5.5 Affected: 4.5.6 Affected: 4.5.7 Affected: 4.5.8 cpe:2.3:a:warmcat:libwebsockets::::::::

Credits

biniam (VulDB User)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-10650",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-03T14:04:17.007618Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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          "dateUpdated": "2026-06-03T14:04:31.919Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:warmcat:libwebsockets:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "SSH Protocol Handler"
          ],
          "product": "libwebsockets",
          "vendor": "warmcat",
          "versions": [
            {
              "status": "affected",
              "version": "4.5.0"
            },
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              "status": "affected",
              "version": "4.5.1"
            },
            {
              "status": "affected",
              "version": "4.5.2"
            },
            {
              "status": "affected",
              "version": "4.5.3"
            },
            {
              "status": "affected",
              "version": "4.5.4"
            },
            {
              "status": "affected",
              "version": "4.5.5"
            },
            {
              "status": "affected",
              "version": "4.5.6"
            },
            {
              "status": "affected",
              "version": "4.5.7"
            },
            {
              "status": "affected",
              "version": "4.5.8"
            }
          ]
        }
      ],
      "credits": [
        {
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          "type": "reporter",
          "value": "biniam (VulDB User)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "vectorString": "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",
            "version": "4.0"
          }
        },
        {
          "cvssV3_1": {
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            "baseSeverity": "MEDIUM",
            "vectorString": "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",
            "version": "3.1"
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            "baseSeverity": "MEDIUM",
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            "version": "3.0"
          }
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            "version": "2.0"
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      "problemTypes": [
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          "descriptions": [
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      "providerMetadata": {
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      },
      "references": [
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          "url": "https://vuldb.com/vuln/367955"
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        {
          "name": "VDB-367955 | CTI Indicators (IOB, IOC, TTP, IOA)",
          "tags": [
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          "name": "Submit #830261 | warmcat libwebsockets 4.5.99-v4.5.0-382-g4a63b9333 Uncontrolled Memory Allocation",
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          "url": "https://github.com/biniamf/pocs/blob/main/libwebsockets_sshd-parse-ic-unbounded-alloc/poc_sshd_unbounded_alloc.py"
        },
        {
          "tags": [
            "patch"
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          "url": "https://github.com/warmcat/libwebsockets/commit/3f9f0c6ecaf0e6f3f219d30632c5d1f2479d7498"
        },
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          "tags": [
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          "time": "2026-06-02T02:00:00.000Z",
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          "time": "2026-06-02T17:24:23.000Z",
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    "datePublished": "2026-06-02T21:15:10.566Z",
    "dateReserved": "2026-06-02T15:19:20.070Z",
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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OESA-2026-2668 (CVE-2026-10650)

CVE-2026-10650 (GCVE-0-2026-10650)

Tags

Sightings

Nomenclature

Related by attack behaviour