How severe is CVE-2026-56022?

CVE-2026-56022 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2026-56022 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-56022?

CVE-2026-56022 affects Webmin. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-56022?

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

Does CVE-2026-56022 have an EU (EUVD) identifier?

Yes. CVE-2026-56022 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37907.

When was CVE-2026-56022 published?

CVE-2026-56022 was published on 2026-06-18 and last updated on 2026-08-11.

CVE-2026-56022

CVE-2026-56022 is a medium-severity vulnerability in Webmin with a CVSS 3.x base score of 5.3. 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-308.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v4: 6.9
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-37907
Weakness: CWE-308
Affected product: Webmin
Published: 2026-06-18
Last modified: 2026-08-11

Description

Webmin accepts basic authentication without session cookies when an attacker provides the 'User-Agent: webmin' header, allowing bypass of additional MFA requirements. Fixed in 2.640.

Frequently asked questions

What is CVE-2026-56022?: Webmin accepts basic authentication without session cookies when an attacker provides the 'User-Agent: webmin' header, allowing bypass of additional MFA requirements. Fixed in 2.640.
How severe is CVE-2026-56022?: CVE-2026-56022 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2026-56022 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-56022?: CVE-2026-56022 affects Webmin. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-56022?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-56022 have an EU (EUVD) identifier?: Yes. CVE-2026-56022 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37907.
When was CVE-2026-56022 published?: CVE-2026-56022 was published on 2026-06-18 and last updated on 2026-08-11.

References

EU advisories (EUVD)

Affected products (1)

cpe:2.3:a:webmin:webmin:*:*:*:*:*:*:*:*

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