# CVE-2026-112892: Pillow MSP RLE decoder memory exhaustion

Source: https://junglewise.ai/threats/cve-2026-112892-pillow-is-a-python-imaging-library-from-4-1-0-until-13-0-0  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-19. Updated: 2026-10-19  
License: CC BY 4.0 with a link back

CVE-2026-112892 · Severity: high · CVSS 4 · Published 2026-10-19

Pillow is a Python image processing library used to read and manipulate images in applications. The MSP image format decoder can be tricked into consuming unbounded memory when processing a crafted image file, causing the application to run out of memory and crash even if the image's declared size passes safety checks. An attacker can exploit this by providing a specially crafted MSP image to any application that uses Pillow to load images.

Technologies: [pillow (PyPI)](https://junglewise.ai/threats/technologies/pillow), [Python Pillow Pillow](https://junglewise.ai/threats/technologies/python-pillow-pillow). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi), [Python Pillow](https://junglewise.ai/threats/vendors/python-pillow).

## Quick answers

**Is CVE-2026-112892 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-112892 being exploited in the wild.

**How severe is CVE-2026-112892?** High severity, with a CVSS score of 4, published 19 October 2026.

**Which products and versions are affected?** pillow (PyPI) >= 4.1.0, < 13.0.0, ECOSYSTEM:introduced=4.1.0,fixed=13.0.0; Python Pillow Pillow 4.1.0 to 12.x.

**Is there a fix for CVE-2026-112892?** Yes. pillow (PyPI): upgrade to 13.0.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-112892 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-112892?** Check whether you run pillow (PyPI) or Python Pillow Pillow at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- pillow (PyPI): upgrade to 13.0.0 or later

  ```sh
  pip install "pillow>=13.0.0"
  ```


## Technical details

The MSP RLE decoder in Pillow versions 4.1.0 through 12.x writes run-length encoded output to a BytesIO buffer without enforcing limits tied to the declared image dimensions, allowing an attacker-controlled MSP file to bypass decompression-bomb checks. The vulnerability exists in the MspImagePlugin's decode function when processing MSP files. An attacker can supply a crafted MSP image to trigger unbounded memory allocation, causing denial of service; this requires only the ability to provide a file to be processed by a Pillow-using application, with no authentication or user interaction beyond opening the file.

## Affected products

- Python Pillow Pillow 4.1.0 to 12.x

## Identifiers

- CVE-2026-112892
- GHSA-gg2r-wvfm-q9rx

## Timeline

- 2026-10-19: advisory
- 2026-10-16: patched

## References

- [https://github.com/python-pillow/Pillow/commit/5dcb630b9798efd91929cb873d677aeee6ed0bb3](https://github.com/python-pillow/Pillow/commit/5dcb630b9798efd91929cb873d677aeee6ed0bb3)
- [https://github.com/python-pillow/Pillow/releases/tag/13.0.0](https://github.com/python-pillow/Pillow/releases/tag/13.0.0)

## Related threats

- [Pillow heap buffer overflow in TIFF encoder with mismatched geometry tags](https://junglewise.ai/threats/cve-2026-128067-pillow-heap-buffer-overflow-saving-tiff-with-libtiff-when-tags)
- [Pillow memory denial of service in TIFF and EXIF parsing](https://junglewise.ai/threats/cve-2026-128066-pillow-memory-dos-in-tiff-and-exif-ifd-parsing-via-overlapping)
- [Pillow libtiff encoder memory disclosure and crash via crafted TIFF tags](https://junglewise.ai/threats/cve-2026-112902-pillow-memory-disclosure-and-segfault-in-libtiff-encoder-via)
- [Pillow EPS load decompression bomb check bypass in Ghostscript scaling](https://junglewise.ai/threats/cve-2026-112899-pillow-eps-load-scale-lets-ghostscript-render-past-the)
- [Pillow heap buffer overflow in bundled libopenjp2](https://junglewise.ai/threats/pillow-bundled-libopenjp2-2-5-4-in-all-wheels-since-11-1-0-carries-osv-cd00a842)