Pillow: Argument Injection in Ghostscript call, potentially leading into RCE

Pillow (pip)

### Summary `PIL.EpsImagePlugin.Ghostscript()` builds the Ghostscript command line using the input file path (`fp.name`) **without sanitization**, placing it at `-f <infile>`. A filename beginning with `-` is interpreted by Ghostscript as an option, giving command-line argument injection; chainable to RCE (see Impact). Reproduces with Pillow's default…

First seen: 21 Oct 2026
Last update: 23 Oct 2026, 11:17 UTC
Fixed in: Pillow 13.0.0
Identifiers: CVE-2026-112900
CVSS: 9.2
Source: GitHub advisory
On the menu as: PyPI packages
Python

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## Pillow: Argument Injection in Ghostscript call, potentially leading into RCE
Severity: critical. Patch status: patched.
Affected: Pillow (pip)
Fixed in: Pillow 13.0.0
Ids: CVE-2026-112900

### Summary `PIL.EpsImagePlugin.Ghostscript()` builds the Ghostscript command line using the input file path (`fp.name`) **without sanitization**, placing it at `-f <infile>`. A filename beginning with `-` is interpreted by Ghostscript as an option, giving command-line argument injection; chainable to RCE (see Impact). Reproduces with Pillow's default…

## Steps
1. Search every lockfile and manifest (package-lock.json, yarn.lock, pnpm-lock.yaml, requirements*.txt, poetry.lock, uv.lock, composer.lock, go.sum, Cargo.lock, Gemfile.lock) for `Pillow`. For each hit, compare the installed version with the fix on the same major line: Pillow 13.0.0. If it's lower, give the exact upgrade command for the package manager this repo uses.

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve("CVE-2026-112900") for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://github.com/advisories/GHSA-w889-685w-c8fh https://github.com/python-pillow/Pillow/commit/a2c363141da31a265dd536c945677db4b64f3ec9 https://github.com/python-pillow/Pillow/releases/tag/13.0.0 https://github.com/python-pillow/Pillow/security/advisories/GHSA-w889-685w-c8fh https://nvd.nist.gov/vuln/detail/CVE-2026-112900 https://thehackernews.com/2026/10/critical-flaw-in-pythons-popular-pillow.html
https://pwned.coffee/i/pillow-argument-injection-in-ghostscript-call-potentiall-cve-2026-112900

Timeline

23 Oct 2026, 11:17 UTC
Additional details on the flaw in Pillow's EPS image handling.
21 Oct 2026
First reported.

Sources

Totalone very hot coffee