CVE-2026-86734 Snipe-IT before 8.7.1 Denial of Service via Unbounded Note Field
Authenticated users can cause denial of service by submitting large note fields that exhaust CPU resources during markdown rendering.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-86734?
CVE-2026-86734 is a high-severity denial of service vulnerability in Snipeitapp Snipe-It, published on 8 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Snipe-IT before 8.7.1 fails to validate the length of the note field in the POST /account/accept/{acceptance} endpoint, allowing authenticated users to submit unbounded input that reaches synchronous CommonMark rendering. Attackers can submit large note values to exhaust PHP worker CPU and cause denial of service through resource exhaustion in the markdown parsing pipeline.
Weakness: CWE-400
Which versions are affected by CVE-2026-86734?
It affects 1 product.
Products include Snipeitapp Snipe-It.
How do I fix CVE-2026-86734?
No fix has been published for CVE-2026-86734 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-86734 being exploited?
There is no known exploitation of CVE-2026-86734 in the wild and no public exploit code.
Other vulnerabilities in Snipeitapp Snipe-It
- CVE-2025-63601 File upload in n/a
- CVE-2026-37709 Snipe-IT has insecure permissions in file uploads
- CVE-2026-86738 Snipe-IT before 8.7.0 CSS Injection via Custom CSS
- CVE-2026-116199 Snipe-IT before 8.6.3 Authentication Bypass via Google SSO Callback
- CVE-2022-1380 Stored Cross Site Scripting vulnerability in Item name parameter in snipe/snipe-it
Sources
Also known as GHSA-4vcv-fc5x-jjwv, GHSA-pqpw-8v7c-2fw4.