Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Lemur versions before 1.9.0 are vulnerable to LDAP filter injection in the LDAP authentication module, where the username is inserted into search filters without escaping. An attacker with valid LDAP credentials can inject filter syntax through the username field to alter group membership queries and may be assigned administrator or other privileged roles in Lemur. Upgrade Lemur to version 1.9.0 or later. No workaround is listed.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 8.1 | High | 3.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0022, the 12th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:03 UTC First seen by agentprime
- 31 Oct 2026, 15:03 UTC Confirmed by OSV