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PatchSiren cyber security CVE debrief

CVE-2026-50889 LLDAP CVE debrief

CVE-2026-50889 is a Denial of Service (DoS) vulnerability in LLDAP v0.6.2. The vulnerability is caused by an input handling flaw in the HTTP refresh token process, which allows attackers to send a crafted refresh-token header to cause a DoS. The CVE was published on 2026-06-15T20:16:31.897Z and has not been modified since then.

Vendor
LLDAP
Product
LLDAP
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-15
Original CVE updated
2026-06-17
Advisory published
2026-06-15
Advisory updated
2026-06-17

Who should care

Users of LLDAP v0.6.2 should be aware of this vulnerability and take necessary steps to mitigate it.

Technical summary

An input handling flaw in the HTTP refresh token process of LLDAP v0.6.2 allows attackers to cause a Denial of Service (DoS) via sending a crafted refresh-token header.

Defensive priority

High

Recommended defensive actions

  • Update to a patched version of LLDAP, if available.
  • Implement input validation and sanitization for HTTP refresh token headers.
  • Monitor for suspicious traffic and implement rate limiting on refresh token requests.

Evidence notes

The CVE record for CVE-2026-50889 can be found at [cve-org]. The NVD detail for this vulnerability can be found at [nvd]. Additional information can be found at [ref-4].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-50889 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-50889

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-50889 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-50889

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.