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CVE-2026-66391

Apache Wicket: leaked and missing CSP headers

MEDIUM
6.5
CVSS Score
Published: July 27, 2026 at 04:45 PM UTC
Updated: October 24, 2026 at 01:10 PM UTC
1 product affected across 1 vendorWicket

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

Description

Use of Insufficiently Random Values, Protection Mechanism Failure vulnerability in Apache Wicket. This issue affects Apache Wicket: from 9.0.0 through 9.23.0, from 10.0.0 through 10.9.0. Users are recommended to upgrade to version 10.10.0, which fixes the issue.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Wicket· Apachemaven
95%
10.0.0 ≤ v < 10.10.09.0.0 ≤ v ≤ 9.23.010.0.09.0.0
Affected range stops below 10.10.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor AdvisoryMailing List
Source: cverecord
https://lists.apache.org/thread/hfzcgjsbmmthzchtb8b8nv47d95scmqk
Mailing ListThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.openwall.com/lists/oss-security/2026/07/27/5

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-330CWE-693

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