PT-2026-29717 · Gleam Wisp · Wisp

John Downey + 1 · Published 2026-04-02 · Updated 2026-04-02 · CVE-2026-32145

NVD

CVSS v4.0

8.7

High

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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.

Fix

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

CVE-2026-32145

Affected Products

Wisp

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-32145 · Security Note
• https://github.com/gleam-wisp/wisp/security/advisories/GHSA-8645-p2v4-73r2 · Vendor Advisory
• https://github.com/gleam-wisp/wisp/commit/7a978748e12ab29db232c222254465890e1a4a90 · Patch