Advisory severityUnratedApache Software Foundation

Advisory [CVE-2026-103885] Apache Directory LDAP API: Denial of service via crafted telephone number values

This security Apache Software Foundation advisory covers CVE-2026-103885 affecting Apache Directory LDAP.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-103885 Source published Oct 2, 2026Source updated Oct 2, 2026

VulniPulse record published Oct 2, 2026Record updated Oct 2, 2026

CVE-2026-103885

Affected products & platforms

Apache Software FoundationUnclassified

Open source advisory

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Summary

Asymmetric Resource Consumption vulnerability in Apache Directory LDAP API.

A LDAP server using the LDAP API (like Apache DS) may consume 100% of a CPU core indefinitely when processing some badly crafted Telephone Numbers.

This issue affects Apache Directory LDAP API: from 2.1.0 before 2.1.9.

Users are recommended to upgrade to version 2.1.9, which fixes the issue.

Affected versions

Apache Directory LDAP API 2.1.0 before 2.1.9

Official advisory · medium-confidence parse· fetched 4 days ago·verify at source

Fixed versions

2.1.9

Official advisory · medium-confidence parse· fetched 4 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Users are recommended to upgrade to version 2.1.9, which fixes the issue.

Official advisory · medium-confidence parse· fetched 4 days ago·verify at source

Sources

Official and corroborating records used to build this advisory.

Official vendor advisoryofficial
Official advisory page fetched and parsed; accepted detail fields are attributed to this page.
Apache Software Foundation
CVE.org CNA recordCVE.org
Independent CNA record used for near-real-time discovery and missed-CVE reconciliation. Discovered from the machine-readable feed https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/delta.json; this link opens the CVE.org record for CVE-2026-103885 instead of the raw feed document.
CVE Program

Cross-references

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CVE-2026-103885NVD CVE.org MITRE

Official resources

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Official documentation
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Apache project downloads (fixed releases)
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