Klaw: user lockout due to case sensitivity inconsistency

published 2026-06-02 5 mo ago modified 2026-07-22 3 mo ago also EUVD-2026-33961

cvss: 2.7; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 14%
public exploits: 0; none known

Klaw is a self-service Apache Kafka Topic Management/Governance tool/portal. Prior to version 2.10.4, a vulnerability exists in the user registration and login mechanisms due to inconsistent handling of username case sensitivity, leading to a targeted Denial of Service (DoS) and complete account lockout. This issue has been patched in version 2.10.4.

Patch / fix

links 1

github.com/Aiven-Open/klaw/releases/tag/v2.10.4 release

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 5 mo ago (2026-06-02)

Exploit prediction

0.24% chance of exploitation in the next 30 days, higher than 14% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	2.7	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L

Affected products

Aiven-Open klaw

Classification

Weakness

CWE-178 Improper Handling of Case Sensitivity
CWE-20 Improper Input Validation

References

Sources

CVE List CVE-2026-44367
NVD CVE-2026-44367

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.

Summary