Quick answers
- Is CVE-2026-86452 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-86452 being exploited in the wild.
- How severe is CVE-2026-86452?
- High severity, with a CVSS score of 7.5, published 7 September 2026.
- Which products and versions are affected?
- Misp ≤2.5.45.
- Is there a fix for CVE-2026-86452?
- A patch was published on 2026-09-01: Fix committed Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-86452 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-86452?
- Check whether you run Misp at an affected version. 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 vulnerability is a denial-of-service (DoS) condition caused by inadequate input validation and rate limiting on unauthenticated endpoints. The /users/forgot and request_API endpoints accepted unbounded, unauthenticated email parameters that were persisted twice per request (in audit logs and job queues) without validation or throttling. An attacker could repeatedly submit requests with extremely long email strings or invalid formats to consume storage and processing resources. The fix introduces a 1024-byte maximum email length, format validation, per-source request budgets with HTTP 429 rate-limiting responses, and a 15-minute cooldown for API-access requests. The vulnerability is unauthenticated and network-reachable, making it trivially exploitable.
Affected products
- MISP MISP ≤2.5.45
Timeline
- 2026-09-07: disclosed: CVE-2026-86452 published
- 2026-09-01: patched: Fix committed