CVE-2026-44617: LDAP filter injection vulnerability in Apache Zeppelin

This month

MEDIUM 6.5REMOTEWATCHLISTUPGRADE

CVE-2026-44617 is a medium-severity flaw (CVSS 6.5) affecting zeppelin. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

LDAP filter injection vulnerability in Apache Zeppelin. LdapRealm used RFC 4514 distinguished-name escaping when constructing LDAP search filters instead of RFC 4515 filter escaping, leaving special filter characters insufficiently escaped. This is an incomplete fix of CVE-2024-31867. This issue affects Apache Zeppelin versions 0.11.1, 0.11.2, and 0.12.0. Users are recommended to upgrade to version 0.12.1, which fixes this issue

Why this priority

Remotely exploitable, no login, no user action
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	None
User interaction	None
EPSS exploit chance	0.8% (top 43%)
CISA exploited list	No
Weakness	CWE-90
Published	2026-07-30
Last modified	2026-10-23

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

Am I affected?

Timeline

2026-07-30 16:17 UTCPublished CVE record published
2026-10-23 22:10 UTCUpdated Record last modified

apache zeppelin UPGRADE

Affected: >= 0.11.1 and < 0.12.1

Fixed in: 0.12.1

Safe to downgrade to: a release before 0.11.1

1. Check installed version

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

2. UPGRADE to 0.12.1 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade zeppelin

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 0.11.1 (Debian / Ubuntu)

apt-cache madison zeppelin sudo apt install zeppelin=<VERSION_BEFORE_0.11.1> sudo apt-mark hold zeppelin

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

dnf --showduplicates list zeppelin sudo dnf downgrade zeppelin-<VERSION_BEFORE_0.11.1> sudo dnf versionlock add zeppelin

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 46 · python-trimesh · FIXED · 5.2.0-1.fc46 · FEDORA-2026-429b4bad4c · source

sudo dnf upgrade --advisory=FEDORA-2026-429b4bad4c

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: github.com/apache/zeppelin/pull/5226

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-2026-44617?

zeppelin: upgrade to 0.12.1. Exact commands for each OS are on this page.

Is CVE-2026-44617 being exploited?

CVE-2026-44617 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-2026-44617 affect?

CVE-2026-44617 affects zeppelin. Severity is medium (CVSS 6.5). LDAP filter injection vulnerability in Apache Zeppelin. LdapRealm used RFC 4514 distinguished-name escaping when constructing LDAP search filters instead of RFC 4515 filter escaping, leaving special filter characters insufficiently escaped.

How urgent is CVE-2026-44617?

Priority 47/100. Remotely exploitable, no login, no user action; On your watchlist

Related CVEs

CVE-2026-44615 MEDIUM 6.5 UPGRADE Path traversal vulnerability in Apache Zeppelin
CVE-2026-44616 MEDIUM 6.5 UPGRADE LDAP injection vulnerability in Apache Zeppelin
CVE-2026-44613 MEDIUM 6.1 UPGRADE Cross-Site Request Forgery (CSRF) vulnerability in Apache Zeppelin

References

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