vLLM is an inference and serving engine for large language models.
CVE-2026-115915
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.loadbase64() 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…
Part of the AI stack
This affects vLLM, in Inference & serving.
Assessment
- CVSS
- 9.8 (v3.1)
- Severity
- Critical
- EPSS
- 0.0066% chance of exploitation in the next 30 days
- Known exploited
- Not listed in CISA KEV
- Exploit availability
- Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
- Published
- 26 October 2026
- Last updated
- 28 October 2026
- Affected
- pip · vllm
- Weakness
- CWE-183, CWE-20
- Assigner
- security-advisories@github.com
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
At the source
References
- https://github.com/vllm-project/vllm/commit/710ac56e691d4713feca50a43e6c440f07d373fd
- https://github.com/vllm-project/vllm/pull/60022
- https://github.com/vllm-project/vllm/releases/tag/v0.32.0
- https://github.com/vllm-project/vllm/security/advisories/GHSA-h3rc-j82p-2c3h
- https://nvd.nist.gov/vuln/detail/CVE-2026-115915
- https://github.com/advisories/GHSA-h3rc-j82p-2c3h
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