CVE-2026-44587: CarrierWave is a framework to upload files from Ruby applications

Routine

MEDIUM 4.7UPGRADE

CVE-2026-44587 is a medium-severity flaw (CVSS 4.7) affecting carrierwave. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

CarrierWave is a framework to upload files from Ruby applications. In versions prior to 2.2.7 and 3.1.3, the content_type_denylist check fails to escape regex metacharacters in string entries, causing the denylist to silently not match the content types it is intended to block. In lib/carrierwave/uploader/content_type_denylist.rb:57, denylist entries are interpolated directly into a regex without Regexp.quote or anchoring, so an entry such as ima

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.7 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 87%)
CISA exploited list	No
Weakness	CWE-79, CWE-184, CWE-625
Published	2026-06-17
Last modified	2026-10-25

Publisher (CNA): GitHub, Inc. · Vendor: carrierwave project

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

Am I affected?

Timeline

2026-06-17 13:20 UTCPublished CVE record published
2026-10-25 23:10 UTCUpdated Record last modified

carrierwave project carrierwave UPGRADE

Affected: < 2.2.7 · >= 3.0.0 and < 3.1.3

Fixed in: 2.2.7, 3.1.3

Safe to downgrade to: a release before 3.0.0

1. Check installed version

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

2. UPGRADE to 2.2.7 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade carrierwave

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 3.0.0 (Debian / Ubuntu)

apt-cache madison carrierwave sudo apt install carrierwave=<VERSION_BEFORE_3.0.0> sudo apt-mark hold carrierwave

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

dnf --showduplicates list carrierwave sudo dnf downgrade carrierwave-<VERSION_BEFORE_3.0.0> sudo dnf versionlock add carrierwave

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-2026-44587?

carrierwave: upgrade to 2.2.7, 3.1.3. Exact commands for each OS are on this page.

Is CVE-2026-44587 being exploited?

CVE-2026-44587 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-2026-44587 affect?

CVE-2026-44587 affects carrierwave. Severity is medium (CVSS 4.7). CarrierWave is a framework to upload files from Ruby applications. In versions prior to 2.2.7 and 3.1.3, the content_type_denylist check fails to escape regex metacharacters in string entries, causing the denylist to silently not match the

How urgent is CVE-2026-44587?

Priority 25/100. Public exploit reference

Software pages

Ruby vulnerabilities

References

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