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CVE-2026-113656— ApostropheCMS: Unauthenticated unbounded multipart upload → disk-exhaustion DoS

Quick assessment

Affected
apostrophecms apostrophe
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.

ApostropheCMS 是一个开源的基于 Node.js 的内容管理系统。在 ApostropheCMS 表单插件 1.5.5 版本之前，其表单提交路由会在执行表单验证或身份认证之前，先对无限制的 multipart 上传进行暂存，且未设置上传文件大小、数量及速率限制。攻击者可利用此漏洞进行重复的未授权提交，从而耗尽临时磁盘存储空间，导致表单处理功能中断，甚至影响主机上的其他服务。该问题已在 ApostropheCMS 表单插件 1.5.5 版本中修复。

CVSS 5.3 · Medium

Possible ATT&CK Techniques 1 AI

T1499.003 · Application Exhaustion Flood

Affected Version Matrix 2

VendorProduct Version RangeStatus
@apostrophecms form < 1.5.5 affected
apostrophecms apostrophe < 4.33.0 affected
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I. Basic Information for CVE-2026-113656

Vulnerability Information
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Vulnerability Title
ApostropheCMS: Unauthenticated unbounded multipart upload → disk-exhaustion DoS
Source: CVE Program / CVE List V5
Vulnerability Description
ApostropheCMS is an open-source Node.js content management system. Prior to 1.5.5 of the ApostropheCMS Form add-on, its form submission route stages unbounded multipart uploads before form validation or authentication and lacks upload size, count, and rate limits. Repeated unauthenticated submissions can consume temporary disk storage and disrupt form handling or other host services. This issue is fixed in ApostropheCMS Form 1.5.5.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
apostrophecms apostrophe < 4.33.0 -
@apostrophecms form < 1.5.5 -

II. Public POCs for CVE-2026-113656

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III. Intelligence Information for CVE-2026-113656

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Other References for CVE-2026-113656 (4)

Same Patch Batch · apostrophecms · 2026-10-20 · 33 CVEs total

CVE-2026-113658 7.5 HIGH ApostropheCMS: Unauthenticated CSV import requests leave rejected uploads in the system te
CVE-2026-113711 7.5 HIGH ApostropheCMS: Unauthenticated resource exhaustion via pre-auth aposBigUpload processing i
CVE-2026-113666 7.1 HIGH ApostropheCMS: Authenticated projection-exclusion prototype-member deletion in @apostrophe
CVE-2026-113653 6.9 MEDIUM ApostropheCMS: The general public can access @apostrophecms/user objects via a relationshi
CVE-2026-112956 6.5 MEDIUM ApostropheCMS: Archive duplicate continuation lets contributors overwrite published conten
CVE-2026-112955 6.5 MEDIUM ApostropheCMS: Import archives can exhaust server storage and deny service
CVE-2026-113649 6.5 MEDIUM ApostropheCMS: Import API bypasses publication roles for protected content
CVE-2026-113659 6.1 MEDIUM ApostropheCMS: Client-side Prototype Pollution in apos.http.parseQuery leading to DOM-base
CVE-2026-112953 6.0 MEDIUM ApostropheCMS: Exposure of Sensitive Information via predictable export filenames
CVE-2026-113710 5.9 MEDIUM ApostropheCMS: No Attempt Throttling on Authenticated Password-Change Endpoint Enables Unl
CVE-2026-113652 5.6 MEDIUM ApostropheCMS uploadfs Azure backend leaks account-level SAS token into every public attac
CVE-2026-112951 5.4 MEDIUM ApostropheCMS: Color field validation bypass allows stored XSS via HTML appended after rgb
CVE-2026-112958 5.4 MEDIUM ApostropheCMS: Stored XSS via Unescaped Widget Style Attribute Serialization
CVE-2026-113661 5.4 MEDIUM ApostropheCMS: Incomplete CVE-2026-53606: `meta http-equiv=refresh` `content` still ships
CVE-2026-113662 5.4 MEDIUM ApostropheCMS import-export: NoSQL injection via update-key value lets a crafted import ma
CVE-2026-113650 5.3 MEDIUM ApostropheCMS sanitize-html: unbounded recursion when re-sanitizing the fallback of a disc
CVE-2026-113654 5.3 MEDIUM ApostropheCMS sanitize-html: nonTextTags discard region ends early on an implied close, le
CVE-2026-113667 5.3 MEDIUM ApostropheCMS: CAPTCHA response token not URL-encoded
CVE-2026-112954 5.3 MEDIUM ApostropheCMS: Unauthenticated publicApiProjection bypass via search and sort query builde
CVE-2026-113669 5.3 MEDIUM ApostropheCMS: Cross-domain session token in URL confers session takeover

Showing top 20 of 33 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: apostrophe
Same vendor: apostrophecms
Same weakness: CWE-770

V. Comments for CVE-2026-113656

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