# CVE-2026-10118: Poppler Splash backend integer overflow in tilingPatternFill

Source: https://junglewise.ai/threats/cve-2026-10118-poppler-splash-backend-integer-overflow-in-tilingpatternfill  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-01. Updated: 2026-06-01  
License: CC BY 4.0 with a link back

CVE-2026-10118 · Severity: high · CVSS 7.8 · Published 2026-06-01

Poppler is a widely used library for rendering PDF documents in various applications and operating systems. A security flaw in its rendering engine allows a malicious PDF file to crash the application or potentially execute unauthorized code when the file is opened. This could lead to the theft of sensitive information or a complete system compromise if a user is tricked into opening a specially crafted document.

Technologies: [Freedesktop.Org Poppler](https://junglewise.ai/threats/technologies/poppler). Vendors: [Freedesktop.Org](https://junglewise.ai/threats/vendors/freedesktop-org).

## Quick answers

**Is CVE-2026-10118 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-10118 being exploited in the wild.

**How severe is CVE-2026-10118?** High severity, with a CVSS score of 7.8, published 1 June 2026.

**Which products and versions are affected?** Freedesktop.Org Poppler current.

**Is there a fix for CVE-2026-10118?** No fixed version is recorded yet. Check the vendor's advisory in the references below. 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-2026-10118 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-10118?** Check whether you run Freedesktop.Org Poppler 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.

## Technical details

An integer overflow vulnerability exists in Poppler's Splash backend within the `tilingPatternFill` function. The flaw is triggered during the computation of `result_width` and `result_height` when processing specific `/Matrix` and `/BBox` values for a given `/Pattern`. This overflow results in an undersized heap memory allocation via `gmallocn_checkoverflow`, leading to a heap-based buffer overflow (out-of-bounds write) in `SplashOutputDev::tilingBitmapSrc` during rendering. An attacker can exploit this by crafting a malicious PDF that, when processed by utilities like `pdftoppm` or other Poppler-based viewers, allows for arbitrary code execution, information disclosure, or a denial of service. The vulnerability was reported by Aisle Research and tracked by Red Hat.

## Affected products

- freedesktop.org Poppler current

## Timeline

- 2026-06-01: disclosed: CVE published and Red Hat advisory released

## References

- [https://access.redhat.com/security/cve/CVE-2026-10118](https://access.redhat.com/security/cve/CVE-2026-10118)
- [https://bugzilla.redhat.com/show_bug.cgi?id=2460428](https://bugzilla.redhat.com/show_bug.cgi?id=2460428)
- [https://gitlab.freedesktop.org/poppler/poppler/-/work_items/1715](https://gitlab.freedesktop.org/poppler/poppler/-/work_items/1715)

## Related threats

- [freedesktop Poppler infinite recursion in pdfseparate](https://junglewise.ai/threats/cve-2025-50420-freedesktop-poppler-infinite-recursion-in-pdfseparate)