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CVE-2026-86452

7.5, high

MISP Uncontrolled Resource Consumption Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
7.5, high high CVSS v3.1
EPSS, next 30 days
0.5% higher than 44.3% of scored CVEs
Exploitation
No public evidence
Published
7 Sept 2026a month ago

Description

Affected versions of MISP permit unauthenticated or weakly constrained request paths to perform persistent work without adequate input bounds or rate limiting. The users/forgot password-reset endpoint accepted an attacker-controlled email value without first imposing a reasonable length bound or validating its format. That value was then used to create an audit log entry and queue a password-reset job, causing the supplied value to be persisted more than once per request. The commit explicitly states that an unbounded unauthenticated request field was stored twice per call with no throttle. The fix adds: - a maximum email input length of 1024 bytes; - email-format validation before persistent work; - a per-source pre-authentication request budget; - HTTP 429 responses when that budget is exceeded; - a 15-minute cooldown for API-access request emails; - POST-only handling and CSRF protection for the API-access request endpoint. The new flood filter is specifically intended to limit persistent storage costs from anonymous requests such as password resets, registrations, and failed REST authentication attempts. Version affected: ≤2.5.45

Details

Vendor
MISP
Product
MISP
Weakness
CWE-400 (opens in a new tab)
Status
Modified
Updated
14 Sept 2026
Assigner
5a6e4751-2f3f-4070-9419-94fb35b644e8

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References 1

Patches and fixes 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other MISP CVEs

Every MISP CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-86419 MISP Exposure of Sensitive Information Vulnerability EPSS 0.4% 9.1, critical
  • CVE-2026-85216 MISP contains an authentication bypass vulnerability in its LDAP and LinOTP authentication components due to insufficient validation of… EPSS 0.9% 9.8, critical
  • CVE-2026-85221 MISP contains an improper TLS certificate validation vulnerability in CurlClient EPSS 0.3% 9.1, critical
  • CVE-2026-85236 misp Cross-Site Request Forgery Vulnerability EPSS 0.3% 8.8, high
  • CVE-2026-85237 A vulnerability in MISP's email-based one-time password (OTP) authentication flow allowed an attacker to perform an unrestricted number… EPSS 0.5% 8.1, high

Beyond this page

Is CVE-2026-86452 in your network?

This page tells you how dangerous CVE-2026-86452 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.