Bug 2560976 (CVE-2026-115915)

Summary: CVE-2026-115915 vllm: vllm: Arbitrary code execution via unrestricted image format parsing
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: alinfoot, bbrownin, dtrifiro, mwoodson, weaton
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in vLLM. The application processes user-supplied image data without restricting accepted file formats or verifying that the content matches the declared media type. A remote attacker can exploit this vulnerability by submitting a specially crafted image, such as an Encapsulated PostScript (EPS) file, to an image-handling endpoint. Depending on the host environment and installed image processing tools, this can result in arbitrary code execution or a Denial of Service (DoS) through resource exhaustion.
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Description OSIDB Bzimport 2026-10-26 17:27:59 UTC 
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.