CVE-2026-86452: MISP Unauthenticated Mail Endpoints Allow Unbounded Storage Consumption and Request Flooding
Vendor fix available · Affected: MISP · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 46% of scored CVEs
DescriptionCVE.org
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
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- MISP · MISPup to and including 2.5.45
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- MISP
- Published
- September 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-86452 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.