How severe is CVE-2026-43975?

CVE-2026-43975 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-43975 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-43975?

CVE-2026-43975 affects Apache Wicket. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-43975?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-43975 have an EU (EUVD) identifier?

Yes. CVE-2026-43975 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-27653.

When was CVE-2026-43975 published?

CVE-2026-43975 was published on 2026-05-06 and last updated on 2026-06-17.

CVE-2026-43975

CVE-2026-43975 is a medium-severity vulnerability in Apache Wicket 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-22.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-27653
Weakness: CWE-22
Affected product: Apache Wicket
Published: 2026-05-06
Last modified: 2026-06-17

Description

FolderUploadsFileManager in Apache Wicket does not validate or sanitize the uploadFieldId parameter or the clientFileName before constructing file paths, allowing an unauthenticated attacker to write arbitrary files outside the intended upload directory or read files from arbitrary locations on the server. This issue affects Apache Wicket: from 8.0.0 through 8.17.0, from 9.0.0 through 9.22.0, from 10.0.0 through 10.8.0. Users are recommended to upgrade to version 10.9.0, which fixes the issue.

Frequently asked questions

What is CVE-2026-43975?: FolderUploadsFileManager in Apache Wicket does not validate or sanitize the uploadFieldId parameter or the clientFileName before constructing file paths, allowing an unauthenticated attacker to write arbitrary files outside the intended upload directory or read files from arbitrary locations on the server. This issue affects Apache Wicket: from 8.0.0 through 8.17.0, from 9.0.0 through 9.22.0, from 10.0.0 through 10.8.0. Users are recommended to upgrade to version 10.9.0, which fixes the issue.
How severe is CVE-2026-43975?: CVE-2026-43975 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-43975 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-43975?: CVE-2026-43975 affects Apache Wicket. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-43975?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-43975 have an EU (EUVD) identifier?: Yes. CVE-2026-43975 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-27653.
When was CVE-2026-43975 published?: CVE-2026-43975 was published on 2026-05-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apache:wicket:*:*:*:*:*:*:*:*

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