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    CVE-2026-103880

    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.

    Published:Oct 2, 2026
    Last Modified:Oct 5, 2026
    EPS:Oct 2, 2026
    EPSS Score:0.00198
    CVSS Score:7.5

    Affected Products

    Vendor
    Apache
    Product
    Directory Ldap Api

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-103885 (CVSS 7.5) — Asymmetric Resource Consumption vulnerability in Apache Directory LDAP API. A LDAP server using the LDAP AP…
    CVE-2026-103877 (CVSS 9.8) — Deserialization of Untrusted Data vulnerability in Apache Directory LDAP API. A rogue/compromised LDAP serv…
    CVE-2026-103878 (CVSS 7.5) — Cleartext transmission of sensitive information vulnerability in Apache Directory LDAP API. A StartTLS exte…
    CVE-2026-103552 (CVSS 7.3) — Stack Overflow vulnerability in Apache Directory LDAP API. Before binding, a client can send a deeply neste…
    CVE-2026-102731 (CVSS 7.5) — Memory allocation with excessive size value vulnerability in Apache Directory LDAP API. A malicious peer (o…
    CVE-2026-35563 (CVSS 8.8) — It was identified that the LDAP client implementation in version 2.1.7 does not verify if the server certifica…
    CVE-2018-1337 (CVSS 9.8) — In Apache Directory LDAP API before 1.0.2, a bug in the way the SSL Filter was setup made it possible for anot…
    CVE-2015-3250 (CVSS 7.5) — Apache Directory LDAP API before 1.0.0-M31 allows attackers to conduct timing attacks via unspecified vectors.…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High