Vulnerability Report

CVE-2026-2340

Title: WORM Protection Bypass in Samba vfs_worm module

Other

Proof Of Concept

No public PoC currently indexed for CVE-2026-2340.

CWE Category CWE-280

Published Date May 27, 2026

Modified Date Jul 02, 2026

Exploit Status Not Found

Score 6.5 CVSS v3.1

Exploit Probability (EPSS)

0.94%

Vulnerability Summary

CVE-2026-2340: A flaw was found in Samba’s vfs_worm module. The module is intended to provide write-once, read-many (WORM) protections by preventing modification of files after a configurable grace period. Due to insufficient validation during rename operations, an authenticated user with write access to a share could overwrite a protected file by renaming a newly created file over the existing WORM-protected file.

Impacted Vendors

samba 1

sgi 1

redhat 1

Reference Links

https://access.redhat.com/security/cve/CVE-2026-2340 https://bugzilla.redhat.com/show_bug.cgi?id=2447318 https://bugzilla.samba.org/show_bug.cgi?id=15997

CVSS v3.1

Source Entity [email protected]

Severity MEDIUM

6.5

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns