LDAP Account Manager: WebAuthn authentication challenge is kept in the PHP session

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-55167
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-14 19:17:17 UTC
Updated2026-10-20 02:17:11 UTC
DescriptionLDAP 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.

Risk And Classification

Primary CVSS: v3.1 4.2 MEDIUM from [email protected]

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

EPSS: 0.002060000 probability, percentile 0.100590000 (date 2026-10-20)

Problem Types: CWE-294 | CWE-294 CWE-294: Authentication Bypass by Capture-replay

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.2MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
3.1CNADECLARED4.2MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA LDAPAccountManager Lam affected < 9.6 Not specified

References

ReferenceSourceLinkTags
github.com/LDAPAccountManager/lam/releases/tag/9.6 [email protected] github.com
github.com/LDAPAccountManager/lam/security/advisories/GHSA-xgjg-fchx-x3g3 [email protected] github.com
github.com/LDAPAccountManager/lam/commit/a56dcaab3e0f572283f5861404ed58d... [email protected] github.com
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