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CVE-2026-86734— Snipe-IT before 8.7.1 Denial of Service via Unbounded Note Field

Quick assessment

Affected
grokability snipe-it
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Snipe-IT 8.7.1 之前的版本在 POST /account/accept/{acceptance} 端点中未对 note 字段的长度进行验证，使得经过身份验证的用户可以提交无界长度输入，该输入会进入同步 CommonMark 渲染流程。攻击者可以通过提交大容量的 note 值来耗尽 PHP 工作进程的 CPU 资源，从而在 Markdown 解析管道中引发资源耗尽，导致服务中断（DoS）。

CVSS 6.5 · Medium

Affected Version Matrix 2

VendorProduct Version RangeStatus
grokability snipe-it < 8.7.1 affected
8.7.1 unaffected
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I. Basic Information for CVE-2026-86734

Vulnerability Information
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Vulnerability Title
Snipe-IT before 8.7.1 Denial of Service via Unbounded Note Field
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
grokability snipe-it 0 ~ 8.7.1 -

II. Public POCs for CVE-2026-86734

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III. Intelligence Information for CVE-2026-86734

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Patches & Fixes for CVE-2026-86734 (1)

Vendor Advisories for CVE-2026-86734 (2)

Same Patch Batch · grokability · 2026-09-08 · 6 CVEs total

CVE-2026-86738 8.7 HIGH Snipe-IT before 8.7.0 CSS Injection via Custom CSS
CVE-2026-86733 7.2 HIGH Snipe-IT before 8.7.0 Remote Code Execution via Backup Restore
CVE-2026-86735 5.0 MEDIUM snipe-it before 8.7.0 SSRF via IPv6 transition address bypass
CVE-2026-86736 4.3 MEDIUM snipe-it before 8.7.0 Checkout Request Counter Integrity Failure
CVE-2026-86737 4.3 MEDIUM snipe-it before 8.7.0 Missing Authorization via barcode endpoint

IV. Related Vulnerabilities

Same product: snipe-it
Same vendor: grokability
Same weakness: CWE-400

V. Comments for CVE-2026-86734

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