CVE-2026-59090: A flaw was found in GIMP's PSD file format plugin

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HIGH 8.4WATCHLISTDOWNGRADEMITIGATE

CVE-2026-59090 is a high-severity flaw (CVSS 8.4) affecting gimp, enterprise linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A flaw was found in GIMP's PSD file format plugin. This vulnerability, an unsigned integer underflow in the `block_rem` variable, occurs when a user opens a specially crafted `.psd` image file. The underflow leads to parser confusion, enabling an attacker to inject arbitrary data as layer resource blocks. This can ultimately result in arbitrary code execution, allowing the attacker to run malicious code on the victim's system.

Why this priority

High severity
Public exploit reference
On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.4 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.6% (top 49%)
CISA exploited list	No
Weakness	CWE-191
Published	2026-08-10
Last modified	2026-10-12

Publisher (CNA): Red Hat, Inc. · Vendor: gimp · redhat

Last updated 2026-10-12 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-10 13:19 UTCPublished CVE record published
2026-10-12 03:17 UTCUpdated Record last modified

gimp gimp DOWNGRADE

Affected: 3.3.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.3.1

1. Check installed version

apt-cache policy gimp || rpm -q gimp || gimp --version

2. No fixed release: DOWNGRADE to a release before 3.3.1 (Debian / Ubuntu)

apt-cache madison gimp sudo apt install gimp=<VERSION_BEFORE_3.3.1> sudo apt-mark hold gimp

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list gimp sudo dnf downgrade gimp-<VERSION_BEFORE_3.3.1> sudo dnf versionlock add gimp

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

redhat enterprise linux MITIGATE

Affected: 7.0 · 8.0 · 9.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2026-59090?

gimp: downgrade or apply the listed mitigation; enterprise linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-59090 being exploited?

CVE-2026-59090 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-2026-59090 affect?

CVE-2026-59090 affects gimp, enterprise linux. Severity is high (CVSS 8.4). A flaw was found in GIMP's PSD file format plugin. This vulnerability, an unsigned integer underflow in the `block_rem` variable, occurs when a user opens a specially crafted `.psd` image file. The underflow leads to parser confusion, enabl

How urgent is CVE-2026-59090?

Priority 52/100. High severity; Public exploit reference; On your watchlist

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References

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