Vulnerability-Lookup

GHSA-XXV9-73GC-96FM

Vulnerability from github – Published: 2026-02-17 03:30 – Updated: 2026-02-17 03:30

Details

LightLLM version 1.1.0 and prior contain an unauthenticated remote code execution vulnerability in PD (prefill-decode) disaggregation mode. The PD master node exposes WebSocket endpoints that receive binary frames and pass the data directly to pickle.loads() without authentication or validation. A remote attacker who can reach the PD master can send a crafted payload to achieve arbitrary code execution.

Severity

9.3 (Critical)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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{
  "affected": [],
  "aliases": [
    "CVE-2026-26220"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-502"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-02-17T03:16:01Z",
    "severity": "CRITICAL"
  },
  "details": "LightLLM version 1.1.0 and prior contain an unauthenticated remote code execution vulnerability in PD (prefill-decode) disaggregation mode. The PD master node exposes WebSocket endpoints that receive binary frames and pass the data directly to pickle.loads() without authentication or validation. A remote attacker who can reach the PD master can send a crafted payload to achieve arbitrary code execution.",
  "id": "GHSA-xxv9-73gc-96fm",
  "modified": "2026-02-17T03:30:15Z",
  "published": "2026-02-17T03:30:15Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-26220"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ModelTC/LightLLM/issues/1213"
    },
    {
      "type": "WEB",
      "url": "https://chocapikk.com/posts/2026/lightllm-pickle-rce"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ModelTC/lightllm/blob/a27dfc88c2144ed51a6e160b6fbe20aad66c8fe0/lightllm/server/api_http.py#L310"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ModelTC/lightllm/blob/a27dfc88c2144ed51a6e160b6fbe20aad66c8fe0/lightllm/server/api_http.py#L331"
    },
    {
      "type": "WEB",
      "url": "https://lightllm-en.readthedocs.io/en/latest/index.html"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/lightllm-pd-mode-unsafe-deserialization-rce"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/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",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-26220 (GCVE-0-2026-26220)

Vulnerability from cvelistv5 – Published: 2026-02-17 01:52 – Updated: 2026-07-14 15:54

Title

LightLLM <= 1.1.0 PD Mode Unsafe Deserialization RCE

Summary

Severity

9.3 (Critical)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: poc Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-02-17 14:37 UTC

CWE

CWE-502 - Deserialization of Untrusted Data

Assigner

VulnCheck mitre root

References

6 references

URL	Tags
https://chocapikk.com/posts/2026/lightllm-pickle-rce/	technical-descriptionexploit
https://github.com/ModelTC/LightLLM/issues/1213	issue-tracking
https://lightllm-en.readthedocs.io/en/latest/index.html	product
https://github.com/ModelTC/lightllm/blob/a27dfc88…	product
https://github.com/ModelTC/lightllm/blob/a27dfc88…	product
https://www.vulncheck.com/advisories/lightllm-pd-…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
ModelTC	LightLLM	Affected: 0 , ≤ 1.1.0 (semver)

Credits

Valentin Lobstein (Chocapikk)

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-26220",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-02-17T14:37:33.792813Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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          "dateUpdated": "2026-02-17T14:37:46.080Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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        {
          "defaultStatus": "unknown",
          "packageName": "LightLLM",
          "packageURL": "pkg:github/ModelTC/lightllm",
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          "repo": "https://github.com/ModelTC/lightllm",
          "vendor": "ModelTC",
          "versions": [
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            }
          ]
        }
      ],
      "credits": [
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          "type": "finder",
          "value": "Valentin Lobstein (Chocapikk)"
        }
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              "type": "text/html",
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            }
          ],
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        }
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      "metrics": [
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            "Recovery": "NOT_DEFINED",
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            "valueDensity": "NOT_DEFINED",
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            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
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        },
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        },
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          "tags": [
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        },
        {
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          "url": "https://www.vulncheck.com/advisories/lightllm-pd-mode-unsafe-deserialization-rce"
        }
      ],
      "source": {
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    "datePublished": "2026-02-17T01:52:03.650Z",
    "dateReserved": "2026-02-11T20:08:07.944Z",
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    "state": "PUBLISHED"
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}

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.

Detection rules are retrieved from Rulezet.

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.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.