Description
An issue was discovered in LemonLDAP::NG through 2.0.8, when NGINX is used. An attacker may bypass URL-based access control to protected Virtual Hosts by submitting a non-normalized URI. This also affects versions before 0.5.2 of the "Lemonldap::NG handler for Node.js" package.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | lemonldap-ng | 2.0.9+ds-1 | — |
| Debian 13 | lemonldap-ng | 2.0.9+ds-1 | — |
| Debian 12 | lemonldap-ng | 2.0.9+ds-1 | — |
| Debian 10 | lemonldap-ng | 2.0.2+ds-7+deb10u5 | DSA-4762-1 |
| Debian 9 | lemonldap-ng | 1.9.7-3+deb9u4 | DLA-2367-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | lemonldap-ng | No fix yet | — |
| Ubuntu 18.04 LTS | lemonldap-ng | No fix yet | — |
| Ubuntu 16.04 LTS | lemonldap-ng | No fix yet | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | lemonldap-ng-handler | < 0.5.2 | 0.5.2 | GHSA-x44x-r84w-8v67 |
Advisories 2
- DSA-4762-1 lemonldap-ng - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2367-1 lemonldap-ng - security update Debian Security (DSA / DLA) · Mar 9, 2026