CVE-2026-51859 Bisheng - Path Traversal

Bisheng 2.3.0, 2.4.0, and 2.4.0-beta1 contain a path traversal caused by improper validation in save_download_file function, letting attackers access arbitrary files, exploit requires crafted input.

CVSS base score 9.1 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.65% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Path Traversal
Impact
File System Read, Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Published
30 September 2026
Updated
15 October 2026
Weakness
CWE-22

Vendor fix

Update to the latest version where this issue is fixed.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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