Advisory severityUnratedApache Software Foundation Updated

Advisory [CVE-2026-103880] Apache Directory LDAP API: Denial of service via excessive bcrypt cost factor in stored passwords

This security Apache Software Foundation advisory covers CVE-2026-103880 affecting Apache Directory LDAP.

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

CVE-2026-103880 Source published Oct 2, 2026Source updated Oct 5, 2026

VulniPulse record published Oct 2, 2026Record updated Oct 5, 2026

CVE-2026-103880

Affected products & platforms

Apache Software FoundationUnclassified

Open source advisory

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Summary

Asymmetric Resource Consumption vulnerability in Apache Directory LDAP API.

Storing a password using the bcrypt algorithm with a high force like 30 in a LDAP server that supports this algorithm will cause the server CPU to run for hours checking the credentials. A bounded cost should be enforced to avoid a server DOS.

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 5 days ago·verify at source

Fixed versions

2.1.9

Official advisory · medium-confidence parse· fetched 5 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 5 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-2026-103880 instead of the raw feed document.
CVE Program

Cross-references

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CVE-2026-103880NVD CVE.org MITRE

Official resources

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Official documentation
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Apache project downloads (fixed releases)
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