Skip to content
Fencer Vulns
critical 9.1

CVE-2020-26214 in the critical feed json

LDAP authentication bypass in Alerta

published 2020-11-06 6 y ago modified 2026-07-08 4 mo ago also GHSA-5hmm-x8q8-w5jh , PYSEC-2020-159 , EUVD-2020-0001

cvss
9.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
65.9%
EPSS 65.9% chance of exploitation in 30 days, percentile 99.2%
public exploits
0
none known, plus a Nuclei check

Summary

In Alerta before version 8.1.0, users may be able to bypass LDAP authentication if they provide an empty password when Alerta server is configure to use LDAP as the authorization provider. Only deployments where LDAP servers are configured to allow unauthenticated authentication mechanism for anonymous authorization are affected. A fix has been implemented in version 8.1.0 that returns HTTP 401 Unauthorized response for any authentication attempts where the password field is empty. As a workaround LDAP administrators can disallow unauthenticated bind requests by clients.

Patch / fix

  • pypi alerta-server 7.5.7, 8.1.0
  • alerta_project alerta 7.5.7, 8.1.0

Exploit prediction

65.93% chance of exploitation in the next 30 days, higher than 99.2% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

CVSS scores

assigned by version score vector
CNA 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P
GitHub 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected packages

ecosystem package affected fixed in
pypi alerta-server
>=8.0.0, <8.1.0
<7.5.7
8.1.0
7.5.7

Affected products

  • alerta alerta

Classification

Weakness

References

Sources

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.