EUVD-2026-77446
GHSA-2944-mcc5-rgm4
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/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
PR:L reflects mandatory authentication with download permission; A:H for memory exhaustion DoS; no confidentiality or integrity impact applies.
Primary rating from Vendor (vulncheck).
CVSS VectorVendor: vulncheck
Lifecycle Timeline
2DescriptionCVE.org
File Browser through 2.63.23 contains a memory exhaustion vulnerability in the subtitle conversion endpoint that loads entire subtitle files into memory without size limits. Authenticated attackers with download permission can request conversion of large .srt, .ass, or .ssa files and exhaust server memory through concurrent requests, causing denial of service.
AnalysisAI
Memory exhaustion in File Browser through 2.63.23 allows authenticated users with download permission to trigger unbounded server memory consumption via the subtitle conversion endpoint. The endpoint loads entire .srt, .ass, or .ssa files into memory without size constraints, and concurrent requests amplify impact to a full denial of service. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated session on the target File Browser instance - specifically, the attacking account must hold download permission, which is a non-default, administrator-granted privilege. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 base score of 7.1 (AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H) accurately captures the core risk profile: network-reachable, low complexity, authenticated-only, availability-only impact. … 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 | Upgrade File Browser to a version above 2.63.23; the exact fixed release version is not independently confirmed from the available data and must be verified via the vendor's GitHub Security Advisory at https://github.com/filebrowser/filebrowser/security/advisories/GHSA-448h-jr2h-3vhp. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all active users with download permissions and assess whether access remains justified; enable detailed logging and real-time alerting on the subtitle conversion endpoint. …
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Same weakness CWE-400 – Uncontrolled Resource Consumption
View allSame technique Denial Of Service
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External POC / Exploit Code
Leaving vuln.today