CVE-2026-11526: GD versions before 2.86 for Perl allow OS command injection and file overwrite via a 2-arg open() of filename

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CRITICAL 9.8REMOTE

CVE-2026-11526 is a critical-severity flaw (CVSS 9.8) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

Critical severity
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.4% (top 29%)
CISA exploited list	No
Weakness	CWE-73, CWE-78
Published	2026-06-14
Last modified	2026-07-23

Publisher (CNA): CPANSec

Last updated 2026-07-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-06-14 12:16 UTCPublished CVE record published
2026-07-23 10:10 UTCUpdated Record last modified

Exact fixes by distribution

Fedora 46 · ruff · FIXED · 0.17.3-1.fc46 · FEDORA-2026-63898fdcbb · source

sudo dnf upgrade --advisory=FEDORA-2026-63898fdcbb

Fedora ELN · xorg-x11-server-Xwayland · FIXED · 26.0.99.903-2.eln159 · FEDORA-2026-4581dab0ed · source

sudo dnf upgrade --advisory=FEDORA-2026-4581dab0ed

Ubuntu 22.04 · libgd-perl · FIXED · 2.76-2ubuntu0.1

sudo apt update && sudo apt install --only-upgrade libgd-perl dpkg --compare-versions "$(dpkg-query -W -f='${Version}' libgd-perl)" ge "2.76-2ubuntu0.1" && echo PATCHED || echo STILL-VULNERABLE

Ubuntu 24.04 · libgd-perl · FIXED · 2.78-1ubuntu0.24.04.1

sudo apt update && sudo apt install --only-upgrade libgd-perl dpkg --compare-versions "$(dpkg-query -W -f='${Version}' libgd-perl)" ge "2.78-1ubuntu0.24.04.1" && echo PATCHED || echo STILL-VULNERABLE

Ubuntu 25.10 · libgd-perl · FIXED · 2.78-1ubuntu0.25.10.1

sudo apt update && sudo apt install --only-upgrade libgd-perl dpkg --compare-versions "$(dpkg-query -W -f='${Version}' libgd-perl)" ge "2.78-1ubuntu0.25.10.1" && echo PATCHED || echo STILL-VULNERABLE

Debian 12 · libgd-perl · FIXED · 2.76-4+deb12u1

sudo apt update && sudo apt install --only-upgrade libgd-perl dpkg --compare-versions "$(dpkg-query -W -f='${Version}' libgd-perl)" ge "2.76-4+deb12u1" && echo PATCHED || echo STILL-VULNERABLE

Debian 13 · libgd-perl · FIXED · 2.78-1+deb13u1

sudo apt update && sudo apt install --only-upgrade libgd-perl dpkg --compare-versions "$(dpkg-query -W -f='${Version}' libgd-perl)" ge "2.78-1+deb13u1" && echo PATCHED || echo STILL-VULNERABLE

RHEL 7 Extended Lifecycle Support · perl-GD · FIXED · perl-GD-2.49-3.el7_9.1

sudo dnf upgrade --advisory=RHSA-2026:49758 rpm -q perl-GD

RHEL 6 · perl-GD · DEFERRED

Alpine 3.21 · perl-gd · FIXED · perl-gd-2.86-r0

apk add --upgrade perl-gd apk info -v perl-gd

Alpine 3.22 · perl-gd · FIXED · perl-gd-2.86-r0

apk add --upgrade perl-gd apk info -v perl-gd

Alpine 3.23 · perl-gd · FIXED · perl-gd-2.86-r0

apk add --upgrade perl-gd apk info -v perl-gd

Alpine 3.24 · perl-gd · FIXED · perl-gd-2.86-r0

apk add --upgrade perl-gd apk info -v perl-gd

Amazon Linux 2023 · see advisory · FIXED · ALAS2023-2026-1890 · source

sudo dnf update --advisory=ALAS2023-2026-1890

Amazon Linux 2 · see advisory · FIXED · ALAS2-2026-3387 · source

sudo yum update --advisory=ALAS2-2026-3387

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-11526?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-11526 being exploited?

CVE-2026-11526 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-11526 affect?

CVE-2026-11526 affects affected software. Severity is critical (CVSS 9.8). 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

How urgent is CVE-2026-11526?

Priority 60/100. Critical severity; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Software pages

Perl vulnerabilities

References

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