CVE-2026-112899 — Pillow: EPS load(scale) lets Ghostscript render past the decompression bomb limit

Affected: python-pillow Pillow

Pillow is a Python imaging library. In versions 2.3.0 through 12.3.0, EPS rendering does not validate the scaled image dimensions before invoking Ghostscript. Applications that process untrusted EPS or PostScript files using an application-selected scale greater than one can incur excessive Ghostscript CPU and temporary disk consumption. In versions with decompression-bomb protection, the scaled output is checked only after Ghostscript has completed rendering, allowing resource consumption beyond the configured pixel limit. The amplification depends on the scale selected by the application, not an attacker-controlled scale value. This issue is fixed in version 13.0.0.

GHSA-vx6w-vv9f-6gvg — Pillow: EPS load(scale) lets Ghostscript render past the decompression bomb limit

Affected: PyPI: Pillow

``` ============================================================================ EPS load(scale) lets Ghostscript render past the decompression bomb limit Location: src/PIL/EpsImagePlugin.py:92 in Ghostscript() Commit: a707c6b21c313880d0771e54965d142dd42358b6 ============================================================================ ```

When an application opens an untrusted Encapsulated PostScript file and asks Pillow to render it at a larger scale, Pillow has Ghostscript produce an image several times bigger than Pillow's configured size limit allows. The size check runs only after Ghostscript has finished rendering and written the full raw image to a temporary file. An attacker who can upload a file of about 100 bytes makes each such request spend scale² times the Ghostscript rendering work and temporary disk space that the limit is meant to permit. For example, at scale 2 that is a 972 MB temporary file.

The cause is in `Ghostscript()` in `src/PIL/EpsImagePlugin.py`. It multiplies the file-declared size by the caller's `scale` (lines 93-94) and passes the product to `gs` as the `-g` output geometry. It never calls `Image._decompression_bomb_check()` on the scaled size. The only check is the one `Image.open()` ran on the unscaled size, so a file declaring 9000×9000 passes, and `load(scale=2)` then asks Ghostscript for 18000×18000 (3.6× `MAX_IMAGE_PIXELS`). A file declaring 18000×18000 directly would be refused before Ghostscript ever ran. `DecompressionBombError` f…

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CVE-2026-112899 — Pillow: EPS load(scale) lets Ghostscript render past the decompression bomb limit

GHSA-vx6w-vv9f-6gvg — Pillow: EPS load(scale) lets Ghostscript render past the decompression bomb limit