CVE-2026-73477: Incorrect Authorization vulnerability in Drupal Quick Tabs allows Forceful Browsing

Routine

MEDIUM 5.3REMOTEUPGRADE

CVE-2026-73477 is a medium-severity flaw (CVSS 5.3) affecting quick tabs. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Incorrect Authorization vulnerability in Drupal Quick Tabs allows Forceful Browsing. This issue affects Quick Tabs versions: from 0.0.0 to 4.3.1.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 76%)
CISA exploited list	No
Weakness	CWE-863
Published	2026-09-02
Last modified	2026-09-16

Publisher (CNA): Drupal.org · Vendor: quick tabs project

Last updated 2026-09-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-02 13:18 UTCPublished CVE record published
2026-09-16 15:35 UTCUpdated Record last modified

quick tabs project quick tabs UPGRADE

Affected: >= 4.0.0 and < 4.3.1 · >= 5.x-1.0 and <= 8.x-3.0

Fixed in: 4.3.1

Safe to downgrade to: a release before 4.0.0

1. Check installed version

apt-cache policy quick-tabs || rpm -q quick-tabs || quick-tabs --version

2. UPGRADE to 4.3.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade quick-tabs

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade quick-tabs

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 4.0.0 (Debian / Ubuntu)

apt-cache madison quick-tabs sudo apt install quick-tabs=<VERSION_BEFORE_4.0.0> sudo apt-mark hold quick-tabs

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

dnf --showduplicates list quick-tabs sudo dnf downgrade quick-tabs-<VERSION_BEFORE_4.0.0> sudo dnf versionlock add quick-tabs

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-2026-73477?

quick tabs: upgrade to 4.3.1. Exact commands for each OS are on this page.

Is CVE-2026-73477 being exploited?

CVE-2026-73477 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-2026-73477 affect?

CVE-2026-73477 affects quick tabs. Severity is medium (CVSS 5.3). Incorrect Authorization vulnerability in Drupal Quick Tabs allows Forceful Browsing. This issue affects Quick Tabs versions: from 0.0.0 to 4.3.1.

How urgent is CVE-2026-73477?

Priority 30/100. Remotely exploitable, no login, no user action

Software pages

Drupal vulnerabilities

References

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