CVE-2026-121555

Foxel through 2.4.0 Unauthenticated File Read via /api/fs/stream and /api/fs/thumb

8.7 High

Foxel through 2.4.0 contains a missing authentication vulnerability that allows unauthenticated attackers to read files by requesting the /api/fs/stream and /api/fs/thumb endpoints. Attackers can supply a VFS mount prefix and relative path to retrieve full file contents or thumbnails across all mounts, bypassing PathRule permission grants.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: None
Availability: None

Exploit likelihood

0.58%Unchanged since Nov 4, 2026

What each source reports

CVE List Score used 8.7

Foxel through 2.4.0 Unauthenticated File Read via /api/fs/stream and /api/fs/thumb

Record: CVE-2026-121555
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-306
Updated: 2026-11-03

EUVDEUVD-2026-115900 8.7

Record: EUVD-2026-115900
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Updated: 2026-11-03

GitHub AdvisoriesGHSA-q47w-6jpv-q372 8.7

Foxel through 2.4.0 contains a missing authentication vulnerability that allows unauthenticated...

Record: GHSA-q47w-6jpv-q372
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/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
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-306
Updated: 2026-11-03

NVD 8.7

Record: CVE-2026-121555
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/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
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-306
Updated: 2026-11-03

OSV 8.7

Foxel through 2.4.0 Unauthenticated File Read via /api/fs/stream and /api/fs/thumb

Record: CVE-2026-121555
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Weakness: CWE-306
Updated: 2026-11-05

Affected products

drizzletime foxel

History

History
Recorded	Changed	Sources
Nov 4, 2026	references	NVD, OSV
Nov 3, 2026	published	EUVD
Nov 3, 2026	published	CVE List, EUVD
Nov 3, 2026	aliases, references	GitHub Advisories, NVD
Nov 3, 2026	cwes, facts, references, severity, title	CVE List
Nov 3, 2026	first indexed	EUVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-121555 is a high vulnerability (CVSS 8.7) in Drizzletime Foxel, published November 3, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.58%, the 47th percentile. No source names a fixed version.