---
title: "CVE-2026-112900: Pillow: Argument Injection in Ghostscript call, potentially leading into RCE"
url: https://erroneo.us/security/cve/CVE-2026-112900/
description: "CVE-2026-112900 (Pillow (PyPI)): Pillow is a Python imaging library. From 2.6.0 until 13.0.0, Pillow is vulnerable to argument injection when invoking…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-10-19
date_modified: 2026-10-21
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-112900"
kev: false
cvss: 9.2
epss: 0.00431
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-112900: Pillow: Argument Injection in Ghostscript call, potentially leading into RCE

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.4% , percentile 36: FIRST’s model estimates a 0.4% chance of exploitation activity in the next 30 days, higher than 36% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes Pillow (PyPI) >= 2.6.0, < 13.0.0, fixed in 13.0.0 . Check your lockfile, including transitive dependencies.
- Editorial verdict: Patch this week. Pillow 13.0.0: Critical Image-Parsing Memory Bugs Fixed — If your service opens images that users or the internet supply, move to Pillow 13.0.0 this week; the worst bugs are memory corruption reachable from a crafted file, and reproducers are in the published advisories.

## What it is

Pillow is a Python imaging library. From 2.6.0 until 13.0.0, Pillow is vulnerable to argument injection when invoking Ghostscript for EPS input. EpsImagePlugin.Ghostscript passes a caller-controlled input filename after -f without converting it to a safe absolute path, so a name beginning with a hyphen can be interpreted as a Ghostscript option. An attacker who controls the filename can inject Ghostscript arguments. Arbitrary command execution specifically requires a leading @ argument-file filename and control of the referenced text file containing additional Ghostscript arguments; the reported chain reproduces with the default -dSAFER invocation. This issue is fixed in version 13.0.0.

## Affected packages

- PyPI `Pillow` >= 2.6.0, < 13.0.0 → fixed: 13.0.0

## Affected products (CVE record)

- python-pillow Pillow: >= 2.6.0, < 13.0.0

## Severity

- GitHub_M CVSS 4.0: 9.2 `CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`
- GitHub CVSS 4.0: 9.2 `CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.43% probability of exploitation activity in the next 30 days; percentile 36.

## Sources

- [GitHub Advisory GHSA-w889-685w-c8fh](https://github.com/advisories/GHSA-w889-685w-c8fh)
- [CVE.org record CVE-2026-112900](https://www.cve.org/CVERecord?id=CVE-2026-112900)
- [NVD entry CVE-2026-112900](https://nvd.nist.gov/vuln/detail/CVE-2026-112900)
- [github.com](https://github.com/python-pillow/Pillow/security/advisories/GHSA-w889-685w-c8fh)
- [github.com](https://github.com/python-pillow/Pillow/commit/a2c363141da31a265dd536c945677db4b64f3ec9)
- [github.com](https://github.com/python-pillow/Pillow/releases/tag/13.0.0)

---
Source page: https://erroneo.us/security/cve/CVE-2026-112900/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt