CVE-2026-11526
Publication date 14 June 2026
Last updated 30 June 2026
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| libgd-perl | 26.04 LTS resolute |
Fixed 2.84-2ubuntu0.1
|
| 25.10 questing |
Fixed 2.78-1ubuntu0.25.10.1
|
|
| 24.04 LTS noble |
Fixed 2.78-1ubuntu0.24.04.1
|
|
| 22.04 LTS jammy |
Fixed 2.76-2ubuntu0.1
|
|
| 20.04 LTS focal |
Needs evaluation
|
|
| 18.04 LTS bionic |
Needs evaluation
|
|
| 16.04 LTS xenial |
Needs evaluation
|
Severity score breakdown
CVSS version: CVSS v3.0
Base score
9.8 · Critical
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
Related Ubuntu Security Notices (USN)
- USN-8484-1
- GD.pm vulnerability
- 30 June 2026