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CVE-2026-54089

File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Starting with 2.0.0-rc.1, when FileBrowser is configured with proxy authentication (auth.method=proxy), any unauthenticated attacker who can reach the server directly can impersonate any user - including admin - by sending a single forged HTTP header. No credentials are required. Additionally, specifying a non-existent username causes the server to automaticall
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:4942959d763b2730bd2cc6d291a217566f8e6ece80212d99e77b53b909e97527
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-290","description":"CWE-290: Authentication Bypass by Spoofing","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:aee548a0e823af9295b93a64c3a40956fa2c5b53ac02612efb46633c2e490b7b · sha256:f7abee27e9b9eebc… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-287","description":"CWE-287: Improper Authentication","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:aee548a0e823af9295b93a64c3a40956fa2c5b53ac02612efb46633c2e490b7b · sha256:f7abee27e9b9eebc… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"filebrowser","vendor":"filebrowser","versions":[{"status":"affected","version":">= 2.0.0-rc.1"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:aee548a0e823af9295b93a64c3a40956fa2c5b53ac02612efb46633c2e490b7b · sha256:f7abee27e9b9eebc… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":9.1,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:aee548a0e823af9295b93a64c3a40956fa2c5b53ac02612efb46633c2e490b7b · sha256:f7abee27e9b9eebc… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-290","description":"CWE-290: Authentication Bypass by Spoofing","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:aee548a0e823af9295b93a64c3a40956fa2c5b53ac02612efb46633c2e490b7b · sha256:f7abee27e9b9eebc… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-287","description":"CWE-287: Improper Authentication","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:aee548a0e823af9295b93a64c3a40956fa2c5b53ac02612efb46633c2e490b7b · sha256:f7abee27e9b9eebc… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"name":"https://github.com/filebrowser/filebrowser/blob/main/auth/proxy.go","tags":["x_refsource_MISC"],"url":"https://github.com/filebrowser/filebrowser/blob/main/auth/proxy.go"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:aee548a0e823af9295b93a64c3a40956fa2c5b53ac02612efb46633c2e490b7b · sha256:f7abee27e9b9eebc… · /containers/cna/references/1
{"name":"https://github.com/filebrowser/filebrowser/blob/main/http/auth.go#L121-L137","tags":["x_refsource_MISC"],"url":"https://github.com/filebrowser/filebrowser/blob/main/http/auth.go#L121-L137"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:aee548a0e823af9295b93a64c3a40956fa2c5b53ac02612efb46633c2e490b7b · sha256:f7abee27e9b9eebc… · /containers/cna/references/2
{"name":"https://github.com/filebrowser/filebrowser/security/advisories/GHSA-xqp3-jq6g-x3qm","tags":["x_refsource_CONFIRM"],"url":"https://github.com/filebrowser/filebrowser/security/advisories/GHSA-xqp3-jq6g-x3qm"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:aee548a0e823af9295b93a64c3a40956fa2c5b53ac02612efb46633c2e490b7b · sha256:f7abee27e9b9eebc… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/filebrowser/filebrowser/security/advisories/GHSA-xqp3-jq6g-x3qm"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:aee548a0e823af9295b93a64c3a40956fa2c5b53ac02612efb46633c2e490b7b · sha256:f7abee27e9b9eebc… · /containers/adp/0/references/0

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.

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