CVE-2026-49326: Missing Authorization vulnerability in Apache HBase thrift and rest delegation service. A scan operation in t

Routine

MEDIUM 6.5WATCHLISTUPGRADE

CVE-2026-49326 is a medium-severity flaw (CVSS 6.5) affecting hbase. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Missing Authorization vulnerability in Apache HBase thrift and rest delegation service. A scan operation in thrift/rest service has 3 steps, open, fetch(possible multiple times), close. The open step will return an id which will be passed back to server for identifying the scanner instances stored at server side. We missed the owner check in fetch and close steps which means a user can fetch rows from the scanner which is opened by other users,

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 59%)
CISA exploited list	No
Weakness	CWE-862
Published	2026-07-24
Last modified	2026-10-24

Publisher (CNA): Apache Software Foundation · Vendor: apache

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-24 15:17 UTCPublished CVE record published
2026-10-24 13:10 UTCUpdated Record last modified

apache hbase UPGRADE

Affected: < 2.5.15 · >= 2.6.0 and < 2.6.6 · 3.0.0 alpha1 · 3.0.0 alpha2 · 3.0.0 alpha3 · 3.0.0 alpha4 · 3.0.0 beta1

Fixed in: 2.5.15, 2.6.6

Safe to downgrade to: a release before 2.6.0

1. Check installed version

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

2. UPGRADE to 2.5.15 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade hbase

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 2.6.0 (Debian / Ubuntu)

apt-cache madison hbase sudo apt install hbase=<VERSION_BEFORE_2.6.0> sudo apt-mark hold hbase

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

dnf --showduplicates list hbase sudo dnf downgrade hbase-<VERSION_BEFORE_2.6.0> sudo dnf versionlock add hbase

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.

Exact fixes by distribution

Fedora ELN · ntpd-rs · FIXED · 1.7.2-3.eln159 · FEDORA-2026-57e4a99310 · source

sudo dnf upgrade --advisory=FEDORA-2026-57e4a99310

Fedora 46 · moby-engine · FIXED · 29.9.2-2.fc46 · FEDORA-2026-4856be87b3 · source

sudo dnf upgrade --advisory=FEDORA-2026-4856be87b3

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-2026-49326?

hbase: upgrade to 2.5.15, 2.6.6. Exact commands for each OS are on this page.

Is CVE-2026-49326 being exploited?

CVE-2026-49326 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-2026-49326 affect?

CVE-2026-49326 affects hbase. Severity is medium (CVSS 6.5). Missing Authorization vulnerability in Apache HBase thrift and rest delegation service. A scan operation in thrift/rest service has 3 steps, open, fetch(possible multiple times), close. The open step will return an id which will be passed

How urgent is CVE-2026-49326?

Priority 38/100. On your watchlist

References

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