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

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-10-19 · updated 2026-10-27
• Weakness: CWE-78

Description

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 products

• python-pillow Pillow: from 2.6.0 before 13.0.0 — fixed in 13.0.0
• Pypi Pillow: from 2.6.0 before 13.0.0; 10.0.0, 10.0.1, 10.1.0, 10.2.0, 10.3.0, 10.4.0 (+72) — fixed in 13.0.0
• python-pillow Pillow: from 2.6.0, < 13.0.0

How to fix

Upgrade to a fixed version: python-pillow Pillow 13.0.0; Pypi Pillow 13.0.0. Check the vendor advisory for mitigations.

In the news

• Critical Flaw in Python’s Popular Pillow Image Library Allows Code Execution via a Crafted Image

References

• 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

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