CVE-2026-95703: MISP OrganisationsController file-existence oracle in logo upload

CVE-2026-95703 · Severity: info · Published 2026-09-22

MISP, a threat intelligence platform, contained a flaw in its organisation logo upload feature that allowed site administrators to discover whether arbitrary files exist on the server and determine the type of image files. An attacker with site-admin privileges could probe the filesystem by submitting crafted file paths and observing distinct error messages to infer the existence and properties of files.

Technologies: Misp. Vendors: Misp.

Quick answers

Is CVE-2026-95703 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-95703 being exploited in the wild.
How severe is CVE-2026-95703?
Informational severity, published 22 September 2026.
Which products and versions are affected?
MISP MISP.
Is there a fix for CVE-2026-95703?
A patch was published on 2026-09-22: Fix applied in commit 12eaadc Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-95703 attacked?
It is attacked over the network.
Am I affected by CVE-2026-95703?
Check whether you run Misp. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The OrganisationsController::__uploadLogo method performed filesystem probes (file_exists, MIME type detection, EXIF reading) on a caller-supplied tmp_name parameter before validating it against is_uploaded_file, creating an information disclosure oracle. This affects only authenticated site-admin users and does not enable file read, code execution, or file modification. The vulnerability was discovered during internal review and patched by hoisting the is_uploaded_file validation before any filesystem operations.

Affected products

  • MISP MISP

Timeline

  • 2026-09-22: disclosed
  • 2026-09-22: patched: Fix applied in commit 12eaadc

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.