CVE-2026-59193: Grav is a file-based Web platform

Routine

MEDIUM 4.9UPGRADE

CVE-2026-59193 is a medium-severity flaw (CVSS 4.9) affecting grav. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Grav is a file-based Web platform. Prior to 2.0.0, an authenticated admin.super user can crash Grav or fill the disk by uploading a specially crafted ZIP archive through the Direct Install tool because Installer::unZip calls ZipArchive::extractTo without limits on uncompressed size, entry count, or directory depth. This issue is fixed in version 2.0.0.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.9 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.6% (top 52%)
CISA exploited list	No
Weakness	CWE-409
Published	2026-07-10
Last modified	2026-10-25

Publisher (CNA): GitHub, Inc. · Vendor: getgrav

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-10 17:17 UTCPublished CVE record published
2026-10-25 15:10 UTCUpdated Record last modified

getgrav grav UPGRADE

Affected: >= 1.0.0 and < 2.0.0 · 2.0.0 beta1

Fixed in: 2.0.0

Safe to downgrade to: a release before 1.0.0

1. Check installed version

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

2. UPGRADE to 2.0.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade grav

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade grav

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 1.0.0 (Debian / Ubuntu)

apt-cache madison grav sudo apt install grav=<VERSION_BEFORE_1.0.0> sudo apt-mark hold grav

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list grav sudo dnf downgrade grav-<VERSION_BEFORE_1.0.0> sudo dnf versionlock add grav

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.

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-2026-59193?

grav: upgrade to 2.0.0. Exact commands for each OS are on this page.

Is CVE-2026-59193 being exploited?

CVE-2026-59193 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-2026-59193 affect?

CVE-2026-59193 affects grav. Severity is medium (CVSS 4.9). Grav is a file-based Web platform. Prior to 2.0.0, an authenticated admin.super user can crash Grav or fill the disk by uploading a specially crafted ZIP archive through the Direct Install tool because Installer::unZip calls ZipArchive::ext

How urgent is CVE-2026-59193?

Priority 34/100. Public exploit reference

Related CVEs

CVE-2025-66844 CRITICAL 9.1 UPGRADE In grav <1.7.49.5, a SSRF (Server-Side Request Forgery) vector may be triggered via Twig templates when page c

References

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