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CVE-2026-27895— LAM has incorrect regular expression in PDF export component that allows user to upload files of any type

Quick assessment

Affected
LDAPAccountManager lam
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

LDAP Account Manager（LAM）是LDAP Account Manager开源的一个 Web 前端，用于管理存储在 LDAP 目录中的条目（例如用户、组、DHCP 设置）。 LDAP Account Manager 9.5之前版本存在安全漏洞，该漏洞源于PDF导出组件未正确验证上传文件扩展名，可能导致远程代码执行。

CVSS 4.3 · Medium EPSS 0.77% · P54

Possible ATT&CK Techniques 1 AI

T1505.003 · Web Shell
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I. Basic Information for CVE-2026-27895

Vulnerability Information
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Vulnerability Title
LAM has incorrect regular expression in PDF export component that allows user to upload files of any type
Source: CVE Program / CVE List V5
Vulnerability Description
LDAP Account Manager (LAM) is a webfrontend for managing entries (e.g. users, groups, DHCP settings) stored in an LDAP directory. Prior to version 9.5, the PDF export component does not correctly validate uploaded file extensions. This way any file type (including .php files) can be uploaded. With GHSA-w7xq-vjr3-p9cf, an attacker can achieve remote code execution as the web server user. Version 9.5 fixes the issue. Although upgrading is recommended, a workaround would be to make /var/lib/ldap-account-manager/config read-only for the web-server user.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
不正确的正则表达式
Source: CVE Program / CVE List V5
Vulnerability Title
LDAP Account Manager 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
LDAP Account Manager（LAM）是LDAP Account Manager开源的一个 Web 前端，用于管理存储在 LDAP 目录中的条目（例如用户、组、DHCP 设置）。 LDAP Account Manager 9.5之前版本存在安全漏洞，该漏洞源于PDF导出组件未正确验证上传文件扩展名，可能导致远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
LDAPAccountManager lam < 9.5 -

II. Public POCs for CVE-2026-27895

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III. Intelligence Information for CVE-2026-27895

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Vendor Advisories for CVE-2026-27895 (2)

Vendor Pages for CVE-2026-27895 (1)

IV. Related Vulnerabilities

Same product: lam
Same vendor: LDAPAccountManager
Same weakness: CWE-185

V. Comments for CVE-2026-27895

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