# CVE-2026-11526: Command injection in GD

> Attackers can execute arbitrary OS commands or overwrite files by passing malicious filenames to Perl GD image constructors.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 14 Jun 2026
- **Updated:** 21 Jun 2026
- **Also known as:** ALPINE-CVE-2026-11526, BELL-CVE-2026-11526, DEBIAN-CVE-2026-11526, GHSA-hx22-9fx3-xg77, MGASA-2026-0318, OESA-2026-2789, RHSA-2026:49758, UBUNTU-CVE-2026-11526, USN-8484-1, openSUSE-SU-2026:11017-1

## What is CVE-2026-11526?

CVE-2026-11526 is a critical command injection vulnerability in RURBAN GD, published on 14 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command), CWE-73 (External Control of File Name or Path)

## Which versions are affected by CVE-2026-11526?


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `perl-GD` | Red Hat:rhel_els:7 | All versions | 0:2.49-3.el7_9.1 |
| `perl-GD-debuginfo` | Red Hat:rhel_els:7 | All versions | 0:2.49-3.el7_9.1 |
| `perl-GD` | openSUSE:Tumbleweed | All versions | 2.860.0-1.1 |

## How do I fix CVE-2026-11526?

Upgrade to a fixed version.

## Is CVE-2026-11526 being exploited?

There is no known exploitation of CVE-2026-11526 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-11526 and fix it if it is affected.

What it is: CVE-2026-11526 is a critical command injection vulnerability in RURBAN GD, published on 14 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-11526 in the wild and no public exploit code.

Affected product: RURBAN GD. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-11526/ (Markdown: https://insights.sbomify.com/CVE-2026-11526/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-11526
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-11526
- OSV: https://osv.dev/vulnerability/CVE-2026-11526

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-11526/
Summaries are generated and may contain mistakes; the official description above is the record.