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Vulnerabilities

Vulnerability · CVE-2026-55167

LDAP Account Manager (LAM) is a webfrontend for managing entries (e.g.

Published Oct 14, 2026 · catalog updated Oct 15, 2026 · LDAP Account Manager (LAM)

Check if you run it

No confirmed exploitation is on record for CVE-2026-55167. EPSS is 0.21%. Act only if a listed version of LDAP Account Manager (LAM) is installed.

Severity
Medium4.2
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.21%
Remediation
Advisory link
Affected products
Debian:12 ldap-account-manager · Debian:13 ldap-account-manager · Debian:14 ldap-account-manager

LDAP Account Manager (LAM) is a webfrontend for managing entries (e.g. users, groups, DHCP settings) stored in an LDAP directory. Prior to 9.6, installations with WebAuthn two-factor authentication leave the challenge in the same PHP session after the authentication response is processed. A user who has already completed valid password authentication can therefore retain the same signed WebAuthn ceremony state instead of consuming it once. The practical risk is limited by the requirement for a valid password, the same PHP session, and a valid authenticator signature. This issue is fixed in version 9.6.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Debian:12 ldap-account-manager8.3-1, 8.5-1, 8.6-1
  • Debian:13 ldap-account-manager9.0-1, 9.5.1-1, 9.6-1
  • Debian:14 ldap-account-manager0 → 9.6-1

How to fix CVE-2026-55167

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-55167. EPSS is 0.21%. Act only if a listed version of LDAP Account Manager (LAM) is installed.

Which versions are affected?

Compare what you have installed with 8.3-1, 8.5-1, 8.6-1, 9.0-1, 9.5.1-1, 9.6-1, 0 → 9.6-1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-294. EPSS 0.21%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Debian security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 14, 2026 · NIST NVD

    Detected

    LDAP Account Manager (LAM) is a webfrontend for managing entries (e.g. users, groups, DHCP settings) stored in an LDAP directory. Prior to 9.6, installations with WebAuthn two-factor authentication leave the challenge in the same PHP session after the authentication response is processed. A user who has already completed valid password authentication can therefore retain the same signed WebAuthn c

  2. Oct 15, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    ldap-account-manager fixed in 9.6-1

  3. Oct 15, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    ldap-account-manager fixed in 9.6-1

  4. Oct 15, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    LDAP Account Manager (LAM) is a webfrontend for managing entries (e.g. users, groups, DHCP settings) stored in an LDAP directory. Prior to 9.6, installations with WebAuthn two-factor authentication leave the challenge in the same PHP session after the authentication response is processed. A user who has already completed valid password authentication can therefore retain the same signed WebAuthn c

Sources

  • CVE.orgVulnerability recordCVE-2026-55167

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-55167

    30-day exploitation probability 0.2%

    first.org
  • NIST NVDVulnerability recordCVE-2026-55167

    LDAP Account Manager (LAM) is a webfrontend for managing entries (e.g. users, groups, DHCP settings) stored in an LDAP directory. Prior to 9.6, installations with WebAuthn two-factor authentication leave the challenge in the same PHP session after the authentication response is p

    nvd.nist.gov
  • OpenSSF OSV / OSV ScannerPackage advisoryDEBIAN-CVE-2026-55167
    osv.dev

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.