How severe is CVE-2026-41326?

CVE-2026-41326 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.

Is CVE-2026-41326 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-41326?

CVE-2026-41326 primarily affects Katacontainers Confidential Containers. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-41326?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-41326 have an EU (EUVD) identifier?

Yes. CVE-2026-41326 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25611.

When was CVE-2026-41326 published?

CVE-2026-41326 was published on 2026-04-24 and last updated on 2026-06-30.

CVE-2026-41326

CVE-2026-41326 is a high-severity vulnerability in Katacontainers Confidential Containers with a CVSS 3.x base score of 8.2. 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-61.

Key facts

Severity: High (CVSS 3.x base score 8.2)
CVSS v4: 8.2
EPSS exploit prediction: 0% (19th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-25611
Weakness: CWE-61
Affected product: Katacontainers Confidential Containers
Published: 2026-04-24
Last modified: 2026-06-30

Description

Kata Containers is an open source project focusing on a standard implementation of lightweight Virtual Machines (VMs) that perform like containers. From v3.4.0 to v3.28.0, an oversight in the CopyFile policy (and perhaps the CopyFile handler) allows untrusted hosts to write to arbitrary locations inside the guest workload image. This can be used to overwrite binaries inside the guest and exfiltrate data from containers; even those running inside CVMs. This vulnerability is fixed in v3.29.0.

Frequently asked questions

What is CVE-2026-41326?: Kata Containers is an open source project focusing on a standard implementation of lightweight Virtual Machines (VMs) that perform like containers. From v3.4.0 to v3.28.0, an oversight in the CopyFile policy (and perhaps the CopyFile handler) allows untrusted hosts to write to arbitrary locations inside the guest workload image. This can be used to overwrite binaries inside the guest and exfiltrate data from containers; even those running inside CVMs. This vulnerability is fixed in v3.29.0.
How severe is CVE-2026-41326?: CVE-2026-41326 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.
Is CVE-2026-41326 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-41326?: CVE-2026-41326 primarily affects Katacontainers Confidential Containers. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-41326?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-41326 have an EU (EUVD) identifier?: Yes. CVE-2026-41326 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25611.
When was CVE-2026-41326 published?: CVE-2026-41326 was published on 2026-04-24 and last updated on 2026-06-30.

References

Affected products (2)

cpe:2.3:a:katacontainers:confidential_containers:*:*:*:*:*:*:*:*
cpe:2.3:a:katacontainers:kata_containers:*:*:*:*:*:*:*:*

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