Vulnerability-Lookup

PYSEC-2026-4346

Vulnerability from pysec - Published: 2026-10-26 18:17 - Updated: 2026-10-29 10:34

Details

vLLM is an inference and serving engine for large language models. Prior to 0.32.0, ImageMediaIO passes attacker-controlled image bytes to Pillow through Image.open(BytesIO(data)) without restricting decoder selection, and the MIME label does not constrain the selected format. Image-capable request paths through parse_image() and fetch_image() can therefore dispatch an EPS payload to host components. A host with Ghostscript affected by CVE-2024-29510 can execute commands with the vLLM process's privileges, while environments using Pillow 12.0.0 through 12.2.0 can trigger CVE-2026-59203 and exhaust media-loading workers. Deployments without the applicable vulnerable dependency are not affected by that corresponding impact. This issue is fixed in version 0.32.0.

Severity

9.8 (Critical)


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

Impacted products

Name	purl
vllm	pkg:pypi/vllm

Aliases

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {},
      "package": {
        "ecosystem": "PyPI",
        "name": "vllm",
        "purl": "pkg:pypi/vllm"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.30.0"
            },
            {
              "fixed": "0.32.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.30.0",
        "0.31.0"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-115915",
    "GHSA-h3rc-j82p-2c3h"
  ],
  "details": "vLLM is an inference and serving engine for large language models. Prior to 0.32.0, ImageMediaIO passes attacker-controlled image bytes to Pillow through Image.open(BytesIO(data)) without restricting decoder selection, and the MIME label does not constrain the selected format. Image-capable request paths through parse_image() and fetch_image() can therefore dispatch an EPS payload to host components. A host with Ghostscript affected by CVE-2024-29510 can execute commands with the vLLM process\u0027s privileges, while environments using Pillow 12.0.0 through 12.2.0 can trigger CVE-2026-59203 and exhaust media-loading workers. Deployments without the applicable vulnerable dependency are not affected by that corresponding impact. This issue is fixed in version 0.32.0.",
  "id": "PYSEC-2026-4346",
  "modified": "2026-10-29T10:34:17.383489Z",
  "published": "2026-10-26T18:17:38.883Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/vllm-project/vllm/releases/tag/v0.32.0"
    },
    {
      "type": "FIX",
      "url": "https://github.com/vllm-project/vllm/commit/710ac56e691d4713feca50a43e6c440f07d373fd"
    },
    {
      "type": "FIX",
      "url": "https://github.com/vllm-project/vllm/pull/60022"
    },
    {
      "type": "FIX",
      "url": "https://github.com/vllm-project/vllm/security/advisories/GHSA-h3rc-j82p-2c3h"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-115915 (GCVE-0-2026-115915)

Vulnerability from cvelistv5 – Published: 2026-10-26 17:16 – Updated: 2026-10-26 19:35

Title

vLLM: Untrusted EPS inputs can trigger denial of service or Ghostscript RCE

Summary

Severity

8.1 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-26 19:31 UTC

CWE

CWE-20 - Improper Input Validation
CWE-183 - Permissive List of Allowed Inputs

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 8129 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/vllm-project/vllm/security/adv…	x_refsource_CONFIRM
https://github.com/vllm-project/vllm/pull/60022	x_refsource_MISC
https://github.com/vllm-project/vllm/commit/710ac…	x_refsource_MISC
https://github.com/vllm-project/vllm/releases/tag…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
vllm-project	vllm	Affected: < 0.32.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-115915",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-26T19:31:21.498549Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-26T19:35:10.423Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "vllm",
          "vendor": "vllm-project",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.32.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "vLLM is an inference and serving engine for large language models. Prior to 0.32.0, ImageMediaIO passes attacker-controlled image bytes to Pillow through Image.open(BytesIO(data)) without restricting decoder selection, and the MIME label does not constrain the selected format. Image-capable request paths through parse_image() and fetch_image() can therefore dispatch an EPS payload to host components. A host with Ghostscript affected by CVE-2024-29510 can execute commands with the vLLM process\u0027s privileges, while environments using Pillow 12.0.0 through 12.2.0 can trigger CVE-2026-59203 and exhaust media-loading workers. Deployments without the applicable vulnerable dependency are not affected by that corresponding impact. This issue is fixed in version 0.32.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-20",
              "description": "CWE-20: Improper Input Validation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-183",
              "description": "CWE-183: Permissive List of Allowed Inputs",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-26T17:16:57.526Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/vllm-project/vllm/security/advisories/GHSA-h3rc-j82p-2c3h",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/vllm-project/vllm/security/advisories/GHSA-h3rc-j82p-2c3h"
        },
        {
          "name": "https://github.com/vllm-project/vllm/pull/60022",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/vllm-project/vllm/pull/60022"
        },
        {
          "name": "https://github.com/vllm-project/vllm/commit/710ac56e691d4713feca50a43e6c440f07d373fd",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/vllm-project/vllm/commit/710ac56e691d4713feca50a43e6c440f07d373fd"
        },
        {
          "name": "https://github.com/vllm-project/vllm/releases/tag/v0.32.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/vllm-project/vllm/releases/tag/v0.32.0"
        }
      ],
      "source": {
        "advisory": "GHSA-h3rc-j82p-2c3h",
        "discovery": "UNKNOWN"
      },
      "title": "vLLM: Untrusted EPS inputs can trigger denial of service or Ghostscript RCE"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-115915",
    "datePublished": "2026-10-26T17:16:06.387Z",
    "dateReserved": "2026-10-23T20:21:45.107Z",
    "dateUpdated": "2026-10-26T19:35:10.423Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

GHSA-H3RC-J82P-2C3H

Vulnerability from github – Published: 2026-10-28 21:15 – Updated: 2026-10-28 21:15

Summary

vLLM: Untrusted EPS inputs can trigger denial of service or Ghostscript RCE

Details

Summary

In vLLM 0.30.0, ImageMediaIO passes attacker-controlled image bytes to Pillow's format autodetection without restricting the accepted formats; the request's MIME label does not constrain decoder selection. An EPS payload labeled image/png reached the host's Ghostscript executable. On a host with Ghostscript affected by CVE-2024-29510, this exposes the known Ghostscript sandbox escape through vLLM's image-loading path and can execute commands with the vLLM process's privileges. A bounded marker-command payload executed through the PyPI wheel's actual ImageMediaIO.load_base64() implementation using Debian Ghostscript 10.03.0. The loader-level execution is reproduced; the HTTP request path is source-traced but was not exercised end to end. This report concerns vLLM's untrusted-format dispatch and does not claim a new Ghostscript vulnerability. Exploitation requires an image-capable request path, a caller able to reach it under the deployment's authentication policy, and a vulnerable host Ghostscript build.

Details

ImageMediaIO is the boundary where attacker-controlled bytes enter Pillow's format autodetection: the declared MIME type does not constrain decoder selection, and the loader calls Image.open(BytesIO(data)) without a Pillow format allowlist. Pillow recognizes EPS by its file signature, and vLLM's subsequent image.load() call enters Pillow's EPS processing path. The OpenAI chat multimodal parser reaches this path through parse_image() and fetch_image() and the media connector; the data URL path extracts the MIME label and forwards the bytes to the loader (source). This is the vLLM-specific issue: untrusted image bytes can select a Pillow-supported format parser. Each downstream impact depends on the relevant parser, component version, and host configuration.

Pillow recognizes EPS by its file signature and invokes Ghostscript with -dSAFER, -sDEVICE=pnmraw, and the untrusted EPS input (Pillow EPS plugin, load path). The command execution in this report uses the already-known Ghostscript CVE-2024-29510, which allows crafted PostScript to bypass -dSAFER; Ghostscript lists 10.03.1 as the upstream fixed version (Ghostscript CVE details). This is an N-day dependency chain: CVE-2024-29510 provides the command-execution primitive, while the vLLM-specific issue is that untrusted, remotely supplied image bytes can reach the affected interpreter. No new Ghostscript flaw is claimed here.

The vLLM Python requirements declare Pillow but not Ghostscript, so this execution chain depends on a Ghostscript executable supplied by the host or deployment image. I reproduced command execution with the PyPI vllm==0.30.0 wheel, Pillow 12.3.0, and Debian amd64 Ghostscript 10.03.0~dfsg-1. The Codean Labs CVE-2024-29510 testkit identified that Ghostscript build as vulnerable. The adapted EPS payload ran only touch on a temporary marker. The marker existed after the loader call, although Pillow then raised ValueError because the exploit changes Ghostscript's output device. The API route was traced in source but a model-backed HTTP request was not run. Only PyPI vllm==0.30.0 was checked; no wider affected release range or other Ghostscript vendor build is claimed.

The same input boundary also exposes a separate Pillow-only denial-of-service condition when the installed Pillow version is 12.0.0–12.2.0. CVE-2026-59203 is triggered by a negative %%BeginBinary byte count and causes Pillow's EPS parser to loop during Image.open(); it does not invoke Ghostscript or provide code execution (Pillow advisory). The published vllm==0.30.0 requirements leave Pillow unpinned, so an existing environment can retain an affected Pillow version; the source at commit bc21cba9673cfc2256a2726b4bc32f062237cd35 requires pillow>=12.3.0. In an isolated local check with Pillow 12.2.0, the official sample hung through ImageMediaIO.load_bytes() and MediaConnector.fetch_image_async(). Eight concurrent image loads occupied the connector's eight media-loading threads and left a benign image load queued. Pillow 12.3.0 rejected the sample promptly. This confirms a conditional media-processing DoS path, separate from the Ghostscript RCE chain; full HTTP-server availability was not measured.

Impact

When a vLLM image-processing endpoint accepts attacker-supplied content and the host has Ghostscript affected by CVE-2024-29510, a caller who can reach the endpoint can trigger command execution as the vLLM process user. API-key authentication and network access controls determine who can reach the request path. Deployments without Ghostscript or with a build fixed for CVE-2024-29510 are not affected by this execution chain. Separately, existing environments that run vLLM 0.30.0 with Pillow 12.0.0–12.2.0 are exposed to CVE-2026-59203 through the same image-format dispatch boundary; the demonstrated impact is exhaustion of media-loading workers, and this Pillow CVE does not cause RCE. The report asks vLLM to assess and address the unsafe dispatch of untrusted image bytes and the affected dependency combinations.

This advisory was fixed in MR60022.

Severity

8.1 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "vllm"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.32.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-115915"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-183",
      "CWE-20"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-10-28T21:15:29Z",
    "nvd_published_at": "2026-10-26T18:17:38Z",
    "severity": "HIGH"
  },
  "details": "### Summary\n\nIn vLLM 0.30.0, `ImageMediaIO` passes attacker-controlled image bytes to Pillow\u0027s format autodetection without restricting the accepted formats; the request\u0027s MIME label does not constrain decoder selection. An EPS payload labeled `image/png` reached the host\u0027s Ghostscript executable. On a host with Ghostscript affected by CVE-2024-29510, this exposes the known Ghostscript sandbox escape through vLLM\u0027s image-loading path and can execute commands with the vLLM process\u0027s privileges. A bounded marker-command payload executed through the PyPI wheel\u0027s actual `ImageMediaIO.load_base64()` implementation using Debian Ghostscript 10.03.0. The loader-level execution is reproduced; the HTTP request path is source-traced but was not exercised end to end. This report concerns vLLM\u0027s untrusted-format dispatch and does not claim a new Ghostscript vulnerability. Exploitation requires an image-capable request path, a caller able to reach it under the deployment\u0027s authentication policy, and a vulnerable host Ghostscript build.\n\n### Details\n\n`ImageMediaIO` is the boundary where attacker-controlled bytes enter Pillow\u0027s format autodetection: the declared MIME type does not constrain decoder selection, and the loader calls `Image.open(BytesIO(data))` without a Pillow format allowlist. Pillow recognizes EPS by its file signature, and vLLM\u0027s subsequent `image.load()` call enters Pillow\u0027s EPS processing path. The OpenAI chat multimodal parser reaches this path through [`parse_image()` and `fetch_image()`](https://github.com/vllm-project/vllm/blob/bc21cba9673cfc2256a2726b4bc32f062237cd35/vllm/entrypoints/chat_utils.py#L1077-L1081) and the [media connector](https://github.com/vllm-project/vllm/blob/bc21cba9673cfc2256a2726b4bc32f062237cd35/vllm/multimodal/media/connector.py#L367-L402); the data URL path extracts the MIME label and forwards the bytes to the loader ([source](https://github.com/vllm-project/vllm/blob/bc21cba9673cfc2256a2726b4bc32f062237cd35/vllm/multimodal/media/connector.py#L319-L332)). This is the vLLM-specific issue: untrusted image bytes can select a Pillow-supported format parser. Each downstream impact depends on the relevant parser, component version, and host configuration.\n\nPillow recognizes EPS by its file signature and invokes Ghostscript with `-dSAFER`, `-sDEVICE=pnmraw`, and the untrusted EPS input ([Pillow EPS plugin](https://github.com/python-pillow/Pillow/blob/12.3.0/src/PIL/EpsImagePlugin.py#L132-L159), [load path](https://github.com/python-pillow/Pillow/blob/12.3.0/src/PIL/EpsImagePlugin.py#L405-L415)). The command execution in this report uses the already-known Ghostscript CVE-2024-29510, which allows crafted PostScript to bypass `-dSAFER`; Ghostscript lists 10.03.1 as the upstream fixed version ([Ghostscript CVE details](https://www.ghostscript.com/releases/cve/index.html)). This is an N-day dependency chain: CVE-2024-29510 provides the command-execution primitive, while the vLLM-specific issue is that untrusted, remotely supplied image bytes can reach the affected interpreter. No new Ghostscript flaw is claimed here.\n\nThe vLLM Python requirements declare Pillow but not Ghostscript, so this execution chain depends on a Ghostscript executable supplied by the host or deployment image. I reproduced command execution with the PyPI `vllm==0.30.0` wheel, Pillow 12.3.0, and Debian amd64 Ghostscript `10.03.0~dfsg-1`. The Codean Labs CVE-2024-29510 testkit identified that Ghostscript build as vulnerable. The adapted EPS payload ran only `touch` on a temporary marker. The marker existed after the loader call, although Pillow then raised `ValueError` because the exploit changes Ghostscript\u0027s output device. The API route was traced in source but a model-backed HTTP request was not run. Only PyPI `vllm==0.30.0` was checked; no wider affected release range or other Ghostscript vendor build is claimed.\n\nThe same input boundary also exposes a separate Pillow-only denial-of-service condition when the installed Pillow version is 12.0.0\u201312.2.0. CVE-2026-59203 is triggered by a negative `%%BeginBinary` byte count and causes Pillow\u0027s EPS parser to loop during `Image.open()`; it does not invoke Ghostscript or provide code execution ([Pillow advisory](https://github.com/python-pillow/Pillow/security/advisories/GHSA-pg7v-jwj7-p798)). The published [`vllm==0.30.0` requirements](https://github.com/vllm-project/vllm/blob/v0.30.0/requirements/common.txt#L21) leave Pillow unpinned, so an existing environment can retain an affected Pillow version; the source at commit `bc21cba9673cfc2256a2726b4bc32f062237cd35` requires [`pillow\u003e=12.3.0`](https://github.com/vllm-project/vllm/blob/bc21cba9673cfc2256a2726b4bc32f062237cd35/requirements/common.txt#L22). In an isolated local check with Pillow 12.2.0, the official sample hung through `ImageMediaIO.load_bytes()` and `MediaConnector.fetch_image_async()`. Eight concurrent image loads occupied the connector\u0027s eight media-loading threads and left a benign image load queued. Pillow 12.3.0 rejected the sample promptly. This confirms a conditional media-processing DoS path, separate from the Ghostscript RCE chain; full HTTP-server availability was not measured.\n\n### Impact\n\nWhen a vLLM image-processing endpoint accepts attacker-supplied content and the host has Ghostscript affected by CVE-2024-29510, a caller who can reach the endpoint can trigger command execution as the vLLM process user. API-key authentication and network access controls determine who can reach the request path. Deployments without Ghostscript or with a build fixed for CVE-2024-29510 are not affected by this execution chain. Separately, existing environments that run vLLM 0.30.0 with Pillow 12.0.0\u201312.2.0 are exposed to CVE-2026-59203 through the same image-format dispatch boundary; the demonstrated impact is exhaustion of media-loading workers, and this Pillow CVE does not cause RCE. The report asks vLLM to assess and address the unsafe dispatch of untrusted image bytes and the affected dependency combinations.\n\nThis advisory was fixed in [MR60022](https://github.com/vllm-project/vllm/pull/60022).",
  "id": "GHSA-h3rc-j82p-2c3h",
  "modified": "2026-10-28T21:15:29Z",
  "published": "2026-10-28T21:15:29Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/vllm-project/vllm/security/advisories/GHSA-h3rc-j82p-2c3h"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-115915"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vllm-project/vllm/pull/60022"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vllm-project/vllm/commit/710ac56e691d4713feca50a43e6c440f07d373fd"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/vllm-project/vllm"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vllm-project/vllm/releases/tag/v0.32.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "vLLM: Untrusted EPS inputs can trigger denial of service or Ghostscript RCE"
}

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.

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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.
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PYSEC-2026-4346

CVE-2026-115915 (GCVE-0-2026-115915)

GHSA-H3RC-J82P-2C3H

Summary

Details

Impact

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Related by attack behaviour