CVE-2026-110133: Ghostscript heap buffer overflow in TrueType font rendering

CVE-2026-110133 · Severity: medium · CVSS 5.8 · Published 2026-10-30

Ghostscript is a document processing tool used to handle PostScript and PDF files. A flaw in how it processes TrueType fonts can allow an attacker to trigger a memory corruption vulnerability by providing a malicious document or font file. An exploit could crash the application, cause a denial of service, or potentially execute arbitrary code on the victim's system.

Quick answers

Is CVE-2026-110133 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-110133 being exploited in the wild.
How severe is CVE-2026-110133?
Medium severity, with a CVSS score of 5.8, published 30 October 2026.
Which products and versions are affected?
Ghostscript.
Is there a fix for CVE-2026-110133?
No fixed version is recorded yet. Avoid processing untrusted documents or standalone TrueType fonts with Ghostscript. If feasible, disable TrueType instruction execution within Ghostscript configurations, and consider running Ghostscript in a restrictive sandbox environment to reduce the blast radius of potential exploitation.</anigation> <parameter name="timeline">[{"kind": "disclosed", "at": "2026-10-30"}] If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-110133 attacked?
It is attacked with local access, in a software library.
Am I affected by CVE-2026-110133?
Check whether you run Ghostscript. 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

Avoid processing untrusted documents or standalone TrueType fonts with Ghostscript. If feasible, disable TrueType instruction execution within Ghostscript configurations, and consider running Ghostscript in a restrictive sandbox environment to reduce the blast radius of potential exploitation.</anigation> <parameter name="timeline">[{"kind": "disclosed", "at": "2026-10-30"}]

Technical details

An integer underflow in the TrueType outliner during font rendering bypasses buffer size checks, leading to a heap-based buffer overflow (CWE-122). The vulnerability is triggered when processing a specially crafted TrueType font or a document embedding one. A remote attacker can exploit this by enticing a victim or automated service to open malicious content, potentially achieving DoS or arbitrary code execution; Red Hat lists this as exploitable via local attack vector with high privileges required.

Affected products

  • Ghostscript

References

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