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CVE-2026-11443

4.6 · MEDIUM

Allegra downloadAttachment Cross-Site Scripting Authentication Bypass Vulnerability.

Published Jun 13, 2026CWE-79EPSS 0.82%

Overview

CVE-2026-11443 is a medium-severity vulnerability. It was published on June 13, 2026 and has a CVSS 3.0 base score of 4.6 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 4.6, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

Allegra downloadAttachment Cross-Site Scripting Authentication Bypass Vulnerability. This vulnerability allows remote attackers to execute arbitrary script on affected installations of Allegra. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the downloadAttachment method. The issue results from the lack of proper validation of user-supplied data, which can lead to the injection of arbitrary script. An attacker can leverage this vulnerability to execute script in the context of the current user. Was ZDI-CAN-28236.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refalltena.com/en/resources/release-notes/release-notes-for-release-9-0-0/Refwww.zerodayinitiative.com/advisories/ZDI-26-358/

How CyberStrike helps

Frequently asked questions

What is CVE-2026-11443?

CVE-2026-11443 is a medium-severity vulnerability. It was published on June 13, 2026 and has a CVSS 3.0 base score of 4.6 (MEDIUM).

How severe is CVE-2026-11443?

This vulnerability has a CVSS 3.0 base score of 4.6, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-11443?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-11443?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-11443 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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