CVE-2021-41532: In Apache Ozone before 1.2.0, Recon HTTP endpoints provide access to OM, SCM and Datanode metadata

Q: How do I fix CVE-2021-41532?

ozone: upgrade to 1.2.0. Exact commands for each OS are on this page.

Q: Is CVE-2021-41532 being exploited?

CVE-2021-41532 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-41532 affect?

CVE-2021-41532 affects ozone. Severity is medium (CVSS 5.3). In Apache Ozone before 1.2.0, Recon HTTP endpoints provide access to OM, SCM and Datanode metadata. Due to a bug, any unauthenticated user can access the data from these endpoints.

Q: How urgent is CVE-2021-41532?

Priority 50/100. Remotely exploitable, no login, no user action; On your watchlist

This month

MEDIUM 5.3REMOTEWATCHLISTUPGRADE

CVE-2021-41532 is a medium-severity flaw (CVSS 5.3) affecting ozone. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Apache Ozone before 1.2.0, Recon HTTP endpoints provide access to OM, SCM and Datanode metadata. Due to a bug, any unauthenticated user can access the data from these endpoints.

Why this priority

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

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	2.4% (top 16%)
CISA exploited list	No
Weakness	CWE-200
Published	2021-11-19
Last modified	2026-06-17

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

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-11-19 10:15 UTCPublished CVE record published
2026-06-17 04:08 UTCUpdated Record last modified

apache ozone UPGRADE

Affected: < 1.2.0

Fixed in: 1.2.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 1.2.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ozone

Note

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

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-2021-41532?

ozone: upgrade to 1.2.0. Exact commands for each OS are on this page.

Is CVE-2021-41532 being exploited?

CVE-2021-41532 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-2021-41532 affect?

CVE-2021-41532 affects ozone. Severity is medium (CVSS 5.3). In Apache Ozone before 1.2.0, Recon HTTP endpoints provide access to OM, SCM and Datanode metadata. Due to a bug, any unauthenticated user can access the data from these endpoints.

How urgent is CVE-2021-41532?

Priority 50/100. Remotely exploitable, no login, no user action; On your watchlist

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CVE-2021-39236 HIGH 8.8 UPGRADE In Apache Ozone before 1.2.0, Authenticated users with valid Ozone S3 credentials can create specific OM reque
CVE-2021-39235 MEDIUM 6.5 UPGRADE In Apache Ozone before 1.2.0, Ozone Datanode doesn't check the access mode parameter of the block token
CVE-2021-39234 MEDIUM 6.8 UPGRADE In Apache Ozone versions prior to 1.2.0, Authenticated users knowing the ID of an existing block can craft spe

References

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