How severe is CVE-2026-4819?

CVE-2026-4819 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-4819 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-4819?

CVE-2026-4819 affects Search-guard Flx. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-4819?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-4819 have an EU (EUVD) identifier?

Yes. CVE-2026-4819 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17507.

When was CVE-2026-4819 published?

CVE-2026-4819 was published on 2026-03-31 and last updated on 2026-06-17.

CVE-2026-4819

CVE-2026-4819 is a medium-severity vulnerability in Search-guard Flx with a CVSS 3.x base score of 4.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-522.

Key facts

Severity: Medium (CVSS 3.x base score 4.9)
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-17507
Weakness: CWE-522
Affected product: Search-guard Flx
Published: 2026-03-31
Last modified: 2026-06-17

Description

In Search Guard FLX versions from 1.0.0 up to 4.0.1, the audit logging feature might log user credentials from users logging into Kibana.

Frequently asked questions

What is CVE-2026-4819?: In Search Guard FLX versions from 1.0.0 up to 4.0.1, the audit logging feature might log user credentials from users logging into Kibana.
How severe is CVE-2026-4819?: CVE-2026-4819 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-4819 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-4819?: CVE-2026-4819 affects Search-guard Flx. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-4819?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-4819 have an EU (EUVD) identifier?: Yes. CVE-2026-4819 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17507.
When was CVE-2026-4819 published?: CVE-2026-4819 was published on 2026-03-31 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:search-guard:flx:*:*:*:*:*:*:*:*

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