Critical

Mass Assignment in MISP UsersController::edit()

IdentifiersCVE-2026-10868CWE-915

CVE-2026-10868 is a mass assignment vulnerability in MISP affecting versions up to and including v2.5.38. The flaw exists in the user edit functionality, specifically in UsersController::edit(), where insufficient filtering of user-supplied fields allowed request data to include a user-controlled User.id value. By crafting an edit request that substitutes another user's identifier, an authenticated attacker could cause the application to apply updates to an unintended user account. The issue stems from trusting client-supplied model fields during update processing rather than enforcing the target user identifier server-side.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation can allow an authenticated attacker to modify attributes of another user's account without authorization. The exact impact depends on which fields are editable through the affected workflow and on the privileges of the attacking account, but it can compromise account integrity and potentially enable unauthorized changes to user profile or account-related settings. The advisory states there was no known active exploitation at disclosure time and no public proof of concept had been released.

Mitigation

If you can’t patch tonight, do this now.

If immediate patching is not possible, restrict access to user edit functionality to the minimum necessary set of authenticated users, closely monitor for suspicious or unexpected account modification activity, and review logs for anomalous user update requests. No complete workaround is described in the advisory; applying the vendor fix is the recommended mitigation.

Remediation

Patch, then assume compromise.

Upgrade MISP to v2.5.39 or later. The vendor addressed the issue by explicitly removing the User.id field from request data before processing the user edit operation, preventing attackers from selecting an unintended target account via crafted input.

PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

MispMispapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

2 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.

2 SOURCESView more in app

No news coverage yet. Advisories and community discussion only.

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.

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Exposure mapping

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Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity1