# CVE-2026-11526

## Summary

- **CVE ID:** CVE-2026-11526
- **Severity:** CRITICAL
- **CVSS Score:** 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** CWE-78, CWE-73
- **Published:** Jun 14, 2026
- **Last Modified:** Jun 21, 2026

## Description

GD versions before 2.86 for Perl allow OS command injection and file overwrite via a 2-arg open() of filename arguments in _make_filehandle.

GD::Image::_make_filehandle opens a filename argument with Perl's 2-arg open(), so a filename that begins or ends with a pipe ("| cmd", "cmd |") or begins with a redirect ("> path", ">> path") is run as a command or redirect rather than opened as a file. _make_filehandle is the single open path behind every filename-accepting constructor (new, newFromPng, newFromJpeg, and the rest); the in-memory *Data variants do not open a path and are unaffected.

Any caller that forwards untrusted input to one of these constructors as a pathname can run an arbitrary command or truncate a file under the process UID.

## Affected Products

- RURBAN — GD (0)

## References

- [CNA](https://github.com/lstein/Perl-GD/commit/67b163713c6c78dfeb693da0978ae934e5cd8210.patch)
- [CNA](https://metacpan.org/release/RURBAN/GD-2.86/changes)
- [CVE](http://www.openwall.com/lists/oss-security/2026/06/14/4)
- [CVE](https://lists.debian.org/debian-lts-announce/2026/06/msg00027.html)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 1.35%
- **EPSS Percentile:** 70.2

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._