CVE-2026-44305 json
Lemur: LDAP TLS certificate verification globally disabled enables credential interception
published 2026-05-06 6 mo ago modified 2026-10-26 14 d ago also EUVD-2026-29865 , GHSA-vr7c-r5gj-j3w5 , PYSEC-2026-2590
- cvss
- 6.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.1%
- EPSS 0.1% chance of exploitation in 30 days, percentile 3%
- public exploits
- 0
- none known
Summary
Lemur manages TLS certificate creation. Prior to 1.9.0, when LDAP TLS is enabled (LDAP_USE_TLS = True), Lemur's LDAP authentication module unconditionally disables TLS certificate verification at the global ldap module level. This allows a man-in-the-middle attacker positioned between Lemur and the LDAP server to intercept all authentication credentials. This vulnerability is fixed in 1.9.0.
Patch / fix
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 5 mo ago
Exploit prediction
0.14% chance of exploitation in the next 30 days, higher than 3% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/Netflix/lemur/security/advisories/GHSA-vr7c-r5gj-j3w5 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.8 | CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
| GitHub | 3.1 | 6.8 | CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
| OSV | 3.1 | 6.8 | CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | lemur | <1.9.0 |
1.9.0 |
Affected products
- Netflix lemur
Classification
- Weakness
-
- CWE-295 Improper Certificate Validation
References
-
github.com
/Netflix/lemur/security/advisories/GHSA-vr7c-r5gj-j3w5
exploit, web
-
nvd.nist.gov
/vuln/detail/CVE-2026-44305
advisory
-
github.com
/Netflix/lemur
package
-
github.com
/Netflix/lemur/releases/tag/v1.9.0
web
-
python-ldap.org
/en/python-ldap-3.4.0/reference/ldap.html#tls-options
web
-
pypi.org
/project/lemur
package
-
github.com
/advisories/GHSA-vr7c-r5gj-j3w5
advisory
Sources
- CVE List CVE-2026-44305
- GitHub Advisory GHSA-vr7c-r5gj-j3w5
- NVD CVE-2026-44305
- OSV PYSEC-2026-2590
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.