Critical

vLLM leaks a heap address when PIL throws an error

Type: advisorySources: OSV

vLLM is an inference and serving engine for large language models (LLMs). From 0.8.3 to before 0.14.1, when an invalid image is sent to vLLM's multimodal endpoint, PIL throws an error. vLLM returns this error to the client, leaking a heap address. With this leak, we reduce ASLR from 4 billion guesses to ~8 guesses. This vulnerability can be chained a heap overflow with JPEG2000 decoder in OpenCV/FFmpeg to achieve remote code execution. This vulnerability is fixed in 0.14.1.

Products: Not specified
Affected versions: Not specified
Fixed versions: Not specified
CVEs: CVE-2026-22778
Confirmed fixed CVEs: Not specified
Updated in this feed: 3 Nov 2026, 08:30 UTC · Revision 1

Source evidence

vLLM leaks a heap address when PIL throws an error

core-osv · Original source

Published 2 Feb 2026, 21:09 UTC

osv:CVE-2026-22778

Complete source record

{
  "id": "ded9739fd0e3662033938c65c24bac6741dd6815661d8df4a20d520d5cdad82b",
  "url": "https://osv.dev/vulnerability/CVE-2026-22778",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "vLLM leaks a heap address when PIL throws an error",
    "summary": "vLLM is an inference and serving engine for large language models (LLMs). From 0.8.3 to before 0.14.1, when an invalid image is sent to vLLM's multimodal endpoint, PIL throws an error. vLLM returns this error to the client, leaking a heap address. With this leak, we reduce ASLR from 4 billion guesses to ~8 guesses. This vulnerability can be chained a heap overflow with JPEG2000 decoder in OpenCV/FFmpeg to achieve remote code execution. This vulnerability is fixed in 0.14.1.",
    "evidence": "osv:CVE-2026-22778",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-22778",
      "aliases": [
        "CVE-2026-22778",
        "GHSA-4r2x-xpjr-7cvv",
        "PYSEC-2026-565"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/vllm-project/vllm",
              "type": "GIT",
              "events": [
                {
                  "introduced": "296c6572dd1f76b31b93be19e550790afcfb8843"
                },
                {
                  "fixed": "d7de043d55d1dd629554467e23874097e1c48993"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0.8.3"
                      },
                      {
                        "fixed": "0.14.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "d7de043d55d1dd629554467e23874097e1c48993"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v0.14.1"
                  },
                  {
                    "cpe": "cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0.8.3"
                      },
                      {
                        "fixed": "0.14.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-22778.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:27.248614532Z",
      "provider": "osv",
      "references": [
        "https://github.com/vllm-project/vllm/releases/tag/v0.14.1",
        "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-22778.json",
        "https://access.redhat.com/errata/RHSA-2026:19712",
        "https://access.redhat.com/errata/RHSA-2026:30087",
        "https://access.redhat.com/errata/RHSA-2026:30088",
        "https://access.redhat.com/errata/RHSA-2026:30089",
        "https://access.redhat.com/errata/RHSA-2026:3461",
        "https://access.redhat.com/errata/RHSA-2026:3462",
        "https://access.redhat.com/errata/RHSA-2026:3713",
        "https://access.redhat.com/errata/RHSA-2026:3782",
        "https://access.redhat.com/security/cve/CVE-2026-22778",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/22xxx/CVE-2026-22778.json",
        "https://github.com/vllm-project/vllm/security/advisories/GHSA-4r2x-xpjr-7cvv",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-22778",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2436113",
        "https://github.com/vllm-project/vllm/pull/31987",
        "https://github.com/vllm-project/vllm/pull/32319"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-532"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/22xxx/CVE-2026-22778.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-22778",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 493834,
  "published_at": "2026-02-02T21:09:53.265+00:00"
}