Resource exhaustion in Gleam-Wisp Wisp

CVE-2026-32145

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.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.008 (54.3th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-32145: held from 0.006 to 0.008.

EPSS over last 30 days · oldest: 0.006 · newest: 0.008 · change: +0.002

Affected products

  • Gleam-Wisp Wisp — versions 0.2.0, d8e722e22ccb42bda9d0b6248658d37ab4e9b376

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-32145?
CVE-2026-32145 is a high-severity vulnerability in Gleam-Wisp Wisp, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-04-02.
How severe is CVE-2026-32145?
High severity. CVSS v3 base score is 7.5 out of 10.