CVE-2026-2340

CVE-2026-2340 is a medium-severity vulnerability in Redhat Openshift Container Platform with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-280.

Key facts

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-2340?
CVE-2026-2340 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2026-2340 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-2340?
CVE-2026-2340 primarily affects Redhat Openshift Container Platform. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-2340?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-2340 have an EU (EUVD) identifier?
Yes. CVE-2026-2340 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-32312.
When was CVE-2026-2340 published?
CVE-2026-2340 was published on 2026-05-27 and last updated on 2026-07-02.

References

Affected products (6)

More vulnerabilities in Redhat Openshift Container Platform

All CVEs affecting Redhat Openshift Container Platform →

Other CWE-280 vulnerabilities

Browse all CWE-280 vulnerabilities →