Baitaphish
Security intelligence
SearchLatest briefing
CVE Explorer

CVE-2026-56020

The Webmin HTTP server (miniserv.pl) allows unauthenticated attackers to impersonate any user with a configured SSL client certificate by sending a forged HTTP header. A remote attacker can spoof certificate DNs and authenticate as any user. Fixed in 2.641.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:2f619ec2aa2bd568044f3693cfc736d53667d39b21a9a18a45bb2537b1abe4ed
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":9.2,"baseSeverity":"CRITICAL","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:577b996db195d4955798d6b156d8163c5e77ee92df3a0f1620edce3f6be1f697 · sha256:403f6fbde40a5efb… · /containers/cna/metrics/1/cvssV4_0

{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:577b996db195d4955798d6b156d8163c5e77ee92df3a0f1620edce3f6be1f697 · sha256:403f6fbde40a5efb… · /containers/cna/metrics/0/cvssV3_1

Affected products and versions

1 source assertion
{"defaultStatus":"unknown","product":"Webmin","vendor":"Webmin","versions":[{"lessThan":"2.641","status":"affected","version":"0","versionType":"custom"},{"status":"unaffected","version":"2.641"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:577b996db195d4955798d6b156d8163c5e77ee92df3a0f1620edce3f6be1f697 · sha256:403f6fbde40a5efb… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":9.2,"baseSeverity":"CRITICAL","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:577b996db195d4955798d6b156d8163c5e77ee92df3a0f1620edce3f6be1f697 · sha256:403f6fbde40a5efb… · /containers/cna/metrics/1/cvssV4_0
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:577b996db195d4955798d6b156d8163c5e77ee92df3a0f1620edce3f6be1f697 · sha256:403f6fbde40a5efb… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-290","description":"CWE-290 Authentication Bypass by Spoofing","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:577b996db195d4955798d6b156d8163c5e77ee92df3a0f1620edce3f6be1f697 · sha256:403f6fbde40a5efb… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"name":"url","tags":["release-notes"],"url":"https://github.com/webmin/webmin/releases/tag/2.641"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:577b996db195d4955798d6b156d8163c5e77ee92df3a0f1620edce3f6be1f697 · sha256:403f6fbde40a5efb… · /containers/cna/references/0
{"name":"url","url":"https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-169-02.json"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:577b996db195d4955798d6b156d8163c5e77ee92df3a0f1620edce3f6be1f697 · sha256:403f6fbde40a5efb… · /containers/cna/references/2
{"name":"url","tags":["release-notes"],"url":"https://webmin.com/security/#webmin-prior-to-2641"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:577b996db195d4955798d6b156d8163c5e77ee92df3a0f1620edce3f6be1f697 · sha256:403f6fbde40a5efb… · /containers/cna/references/1
{"name":"url","tags":["vdb-entry"],"url":"https://www.cve.org/CVERecord?id=CVE-2026-56020"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:577b996db195d4955798d6b156d8163c5e77ee92df3a0f1620edce3f6be1f697 · sha256:403f6fbde40a5efb… · /containers/cna/references/3

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

← Back to CVE Explorer