CVE Explorer

CVE-2026-27944

Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.3, the /api/backup endpoint is accessible without authentication and discloses the encryption keys required to decrypt the backup in the X-Backup-Security response header. This allows an unauthenticated attacker to download a full system backup containing sensitive data (user credentials, session tokens, SSL private keys, Nginx configurations) and decrypt it immediately. This issue has been patched in version 2.3.3.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:9ff16e2c26d5fbda98438d900bd3c3743a42eea22130c380a3ad16cf85bd268b

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-306","description":"CWE-306: Missing Authentication for Critical Function","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:0e3e23434a15937570d363a01c70c23e4b44fb84fedfc17fee657671432e2ea4 · sha256:4b0c3164d601331b… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-311","description":"CWE-311: Missing Encryption of Sensitive Data","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:0e3e23434a15937570d363a01c70c23e4b44fb84fedfc17fee657671432e2ea4 · sha256:4b0c3164d601331b… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion

{"product":"nginx-ui","vendor":"0xJacky","versions":[{"status":"affected","version":"< 2.3.3"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:0e3e23434a15937570d363a01c70c23e4b44fb84fedfc17fee657671432e2ea4 · sha256:4b0c3164d601331b… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.8,"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:H","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:0e3e23434a15937570d363a01c70c23e4b44fb84fedfc17fee657671432e2ea4 · sha256:4b0c3164d601331b… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions

{"cweId":"CWE-306","description":"CWE-306: Missing Authentication for Critical Function","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:0e3e23434a15937570d363a01c70c23e4b44fb84fedfc17fee657671432e2ea4 · sha256:4b0c3164d601331b… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-311","description":"CWE-311: Missing Encryption of Sensitive Data","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:0e3e23434a15937570d363a01c70c23e4b44fb84fedfc17fee657671432e2ea4 · sha256:4b0c3164d601331b… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion

{"name":"https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-g9w5-qffc-6762","tags":["x_refsource_CONFIRM"],"url":"https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-g9w5-qffc-6762"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:0e3e23434a15937570d363a01c70c23e4b44fb84fedfc17fee657671432e2ea4 · sha256:4b0c3164d601331b… · /containers/cna/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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