CVE-2026-53561: An improper authentication vulnerability in HiveServer2 SAML bearer-token validation in Apache Hive 4.0.0 thro

This month

HIGH 7.4REMOTEWATCHLISTUPGRADE

CVE-2026-53561 is a high-severity flaw (CVSS 7.4) affecting hive. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An improper authentication vulnerability in HiveServer2 SAML bearer-token validation in Apache Hive 4.0.0 through 4.2.0 (and later unreleased branches) on deployments using HTTP transport with hive.server2.authentication=SAML allows an unauthenticated network attacker to authenticate as an arbitrary Hive user and obtain an authenticated HiveServer2 session via a forged Authorization: Bearer token sent to the /cliservice HTTP endpoint. Users are r

Why this priority

High severity
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.4 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 73%)
CISA exploited list	No
Weakness	CWE-287, CWE-305, CWE-345
Published	2026-08-25
Last modified	2026-09-28

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

Last updated 2026-09-28 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-25 11:16 UTCPublished CVE record published
2026-09-28 23:10 UTCUpdated Record last modified

apache hive UPGRADE

Affected: >= 4.0.0 and < 4.2.1

Fixed in: 4.2.1

Safe to downgrade to: a release before 4.0.0

1. Check installed version

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

2. UPGRADE to 4.2.1 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade hive

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 hive sudo apt install hive=<VERSION_BEFORE_4.0.0> sudo apt-mark hold hive

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

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

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-2026-53561?

hive: upgrade to 4.2.1. Exact commands for each OS are on this page.

Is CVE-2026-53561 being exploited?

CVE-2026-53561 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-2026-53561 affect?

CVE-2026-53561 affects hive. Severity is high (CVSS 7.4). An improper authentication vulnerability in HiveServer2 SAML bearer-token validation in Apache Hive 4.0.0 through 4.2.0 (and later unreleased branches) on deployments using HTTP transport with hive.server2.authentication=SAML allows an unau

How urgent is CVE-2026-53561?

Priority 43/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

Related CVEs

CVE-2026-49845 CRITICAL 9.8 DOWNGRADE SQL injection in Hive Metastore direct SQL partition-name resolution in Apache Hive before 4.2.1 on all platfo
CVE-2026-55976 CRITICAL 9.1 DOWNGRADE Server-Side Request Forgery (SSRF) in Avro SerDe schema resolution in Apache Hive before 4.2.1 allows an authe

References

← Back to latest CVEs