CVE-2026-42538: CWE-434: Unrestricted Upload of File with Dangerous Type in dfir-iris iris-web
A vulnerability in dfir-iris iris-web prior to version 2.4.28 allows unrestricted upload of files with dangerous types due to improper validation. This can be exploited to host phishing pages and also leads to a Cross-Site Scripting (XSS) vulnerability. The issue is addressed in version 2.4.28.
AI Analysis
Technical Summary
CVE-2026-42538 is a CWE-434 vulnerability affecting dfir-iris iris-web versions before 2.4.28. The application does not properly validate uploaded files, enabling attackers to upload malicious files such as phishing pages. This improper validation also results in a Cross-Site Scripting (XSS) vulnerability. The vulnerability has a CVSS 3.1 base score of 6.3, indicating a medium severity. A patch fixing this issue was released in version 2.4.28.
Potential Impact
Successful exploitation allows attackers to upload and host malicious files, including phishing pages, on the vulnerable platform. This can facilitate phishing attacks and also triggers a Cross-Site Scripting vulnerability, potentially impacting confidentiality and integrity of user data. There is no indication of availability impact. No known exploits are reported in the wild.
Mitigation Recommendations
Upgrade dfir-iris iris-web to version 2.4.28 or later, which contains the patch for this vulnerability. No other mitigation guidance is provided or necessary as the issue is resolved in the fixed version.
CVE-2026-42538: CWE-434: Unrestricted Upload of File with Dangerous Type in dfir-iris iris-web
Description
A vulnerability in dfir-iris iris-web prior to version 2.4.28 allows unrestricted upload of files with dangerous types due to improper validation. This can be exploited to host phishing pages and also leads to a Cross-Site Scripting (XSS) vulnerability. The issue is addressed in version 2.4.28.
CVSS v3.1
Score 6.3medium
Affected software
pkg:github/dfir-iris/iris-webRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-42538 is a CWE-434 vulnerability affecting dfir-iris iris-web versions before 2.4.28. The application does not properly validate uploaded files, enabling attackers to upload malicious files such as phishing pages. This improper validation also results in a Cross-Site Scripting (XSS) vulnerability. The vulnerability has a CVSS 3.1 base score of 6.3, indicating a medium severity. A patch fixing this issue was released in version 2.4.28.
Potential Impact
Successful exploitation allows attackers to upload and host malicious files, including phishing pages, on the vulnerable platform. This can facilitate phishing attacks and also triggers a Cross-Site Scripting vulnerability, potentially impacting confidentiality and integrity of user data. There is no indication of availability impact. No known exploits are reported in the wild.
Mitigation Recommendations
Upgrade dfir-iris iris-web to version 2.4.28 or later, which contains the patch for this vulnerability. No other mitigation guidance is provided or necessary as the issue is resolved in the fixed version.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-28T16:56:50.190Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a21e829e29bf47b50d078e5
Added to database: 06/04/2026, 21:03:37 UTC
Last enriched: 06/12/2026, 10:23:37 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 74
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