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CVE-2026-32145— Multipart form body parser bypasses body size limits in wisp

Quick assessment

Affected
gleam-wisp wisp
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.

Wisp是Wisp开源的一个实用的Gleam web框架，用于快速开发，且易于维护。 wisp 0.2.0至2.2.2之前版本存在安全漏洞，该漏洞源于多部分表单解析绕过资源限制，可能导致拒绝服务攻击。

AI Predicted 7.5 Difficulty: Easy EPSS 0.62% · P47

Possible ATT&CK Techniques 1 AI

T1498 · Network Denial of Service
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I. Basic Information for CVE-2026-32145

Vulnerability Information
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Vulnerability Title
Multipart form body parser bypasses body size limits in wisp
Source: CVE Program / CVE List V5
Vulnerability Description
Allocation of Resources Without Limits or Throttling vulnerability in gleam-wisp wisp allows a denial of service via multipart form body parsing. The multipart_body function bypasses configured max_body_size and max_files_size limits. When a multipart boundary is not present in a chunk, the parser takes the MoreRequiredForBody path, which appends the chunk to the output but passes the quota unchanged to the recursive call. Only the final chunk containing the boundary is counted via decrement_quota. The same pattern exists in multipart_headers, where MoreRequiredForHeaders recurses without calling decrement_body_quota. An unauthenticated attacker can exhaust server memory or disk by sending arbitrarily large multipart form submissions in a single HTTP request. This issue affects wisp: from 0.2.0 before 2.2.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
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
Vulnerability Title
Wisp 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Wisp是Wisp开源的一个实用的Gleam web框架，用于快速开发，且易于维护。 wisp 0.2.0至2.2.2之前版本存在安全漏洞，该漏洞源于多部分表单解析绕过资源限制，可能导致拒绝服务攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
gleam-wisp wisp 0.2.0 ~ 2.2.2 cpe:2.3:a:gleam-wisp:wisp:*:*:*:*:*:*:*:*
gleam-wisp wisp d8e722e22ccb42bda9d0b6248658d37ab4e9b376 ~ 7a978748e12ab29db232c222254465890e1a4a90 cpe:2.3:a:gleam-wisp:wisp:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-32145

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III. Intelligence Information for CVE-2026-32145

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Vendor Advisories for CVE-2026-32145 (2)

IV. Related Vulnerabilities

Same product: wisp
Same vendor: gleam-wisp
Same weakness: CWE-770

V. Comments for CVE-2026-32145

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