# EPUBCheck MED-004: Image file header may be corrupted

Source: https://epublab.com/epubcheck/med-004/ (updated 2026-11-03)

EPUBCheck MED-004 is an error message: “Image file header may be corrupted.” An image file's header looks damaged, so the image may not display.

- Official message (EPUBCheck 5.4.0): Image file header may be corrupted.
- Default severity: Error

## Typical causes

- An image truncated in a copy or saved by a faulty tool.

## How to fix it

- Re-export the image from its source and replace the file.

Message text and severity: EPUBCheck (W3C, BSD-3-Clause). Explanation: EPUBLab.