CVE-2026-44617: zeppelin — Fix

Description

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.

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CVSS v3.1 Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS — Exploit Prediction

0.0052

Probability of exploitation

0.42%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-90 CWE-90

Affected Products

Vendor	Product	Versions
apache	zeppelin	0.11.1 — 0.12.1

References

Advisories & Patches

https://github.com/apache/zeppelin/pull/5226 https://lists.apache.org/thread/s65t6n3s1v4j5b1w7zvv5w73ko69m1zv

Other References

https://www.cve.org/CVERecord?id=CVE-2024-31867

Frequently Asked Questions

What is CVE-2026-44617? +

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. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2026-44617? +

CVE-2026-44617 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0052, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-44617? +

CVE-2026-44617 affects products from apache, specifically: zeppelin. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-44617? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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