PatchTheCVECVE-2026-86734: Snipe-IT before 8.7.1 fails to validate the length of the note field in the POST /account/accept/{acceptance}
CVE-2026-86734 is a medium-severity flaw (CVSS 6.5) affecting snipe-it. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.5 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.5% (top 54%) |
| CISA exploited list | No |
| Weakness | CWE-400 |
| Published | 2026-09-08 |
| Last modified | 2026-09-10 |
Last updated 2026-09-10 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-86734?
snipe-it: upgrade to 8.7.1. Exact commands for each OS are on this page.
Is CVE-2026-86734 being exploited?
CVE-2026-86734 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-86734 affect?
CVE-2026-86734 affects snipe-it. Severity is medium (CVSS 6.5). 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 subm
How urgent is CVE-2026-86734?
Priority 34/100. No elevated risk signals yet.
Software pages
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