EUVD-2026-81063
GHSA-9p4g-9hh7-7mj3
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-reachable route with the authorization decorator omitted gives AV:N/AC:L/PR:N/UI:N; impact is limited to reading translated file contents, so C:L and I:N/A:N.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
2DescriptionCVE.org
LibreTranslate through 1.9.6 omits the access_check decorator from the download_file route, allowing unauthenticated access to translated files. Attackers can bypass API key requirements and abuse ban lists to download files without authentication on protected instances.
AnalysisAI
Unauthenticated users can download translated files from LibreTranslate deployments running version 1.9.6 or earlier because the download_file route is missing the access_check decorator, letting requests bypass the API key requirement and ban-list enforcement that operators configured for protected instances (CWE-862 missing authorization). Impact is limited to reading translated file output with no integrity or availability effect, and practical exposure depends on whether download identifiers are predictable or enumerable by the attacker. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Applies to LibreTranslate instances up to and including 1.9.6 where operators have enabled protective controls - API key requirements and/or ban lists - since the bug lets requests reach translated files while skipping exactly those checks. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine but moderate-severity authorization gap, not a critical-flaw-masquerading-as-high-CVSS. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patch was identified in the available references at time of analysis; the fix is expected to come from the upstream project tracked in GitHub issue https://github.com/LibreTranslate/LibreTranslate/issues/1012, so administrators should monitor https://github.com/LibreTranslate/LibreTranslate and the VulnCheck advisory https://www.vulncheck.com/advisories/libretranslate-through-1.9.6-missing-access-check-on-the-download-file-route and upgrade as soon as a corrected release is published. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-862 – Missing Authorization
View allSame technique Authentication Bypass
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External POC / Exploit Code
Leaving vuln.today