CVE-2026-32145Multipart form body parser bypasses body size limits in wisp
- 8.7HighCVSS base score
- 0.63%Exploitation in 30 daysEPSS · top 49% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By EEF
- 23 days later
· 23 days later
Published
- 5 days later
· 5 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| EEFCNA (assigner) | 4.0 | High8.7 | 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 |
| NVDNVD · Analyzed | 4.0 | High8.7 | 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/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 |
- EPSS (exploitation in 30 days)
- 0.63% · top 49% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.7.
Affected products
- affected 0.2.0 – < 2.2.2
- affected d8e722e22ccb42bda9d0b6248658d37ab4e9b376 – < 7a978748e12ab29db232c222254465890e1a4a90
Affected packages
From reviewed advisories of the GitHub Advisory Database.
What to do
Workaround: Deploy a reverse proxy (such as nginx or HAProxy) in front of the wisp application and configure it to enforce request body size limits.
References
References4
- https://github.com/gleam-wisp/wisp/security/advisories/GHSA-8645-p2v4-73r2 (opens in a new tab)vendor-advisoryrelated
- https://cna.erlef.org/cves/CVE-2026-32145.html (opens in a new tab)related
- https://osv.dev/vulnerability/EEF-CVE-2026-32145 (opens in a new tab)related
- https://github.com/gleam-wisp/wisp/commit/7a978748e12ab29db232c222254465890e1a4a90 (opens in a new tab)patch
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-18186 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-8645-p2v4-73r2 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-32145)Record last updated .