CVE-2026-32145 json
Multipart form body parser bypasses body size limits in wisp
published 2026-04-02 7 mo ago modified 2026-10-26 13 d ago also EEF-CVE-2026-32145 , EUVD-2026-18186 , GHSA-8645-p2v4-73r2
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 50%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- hex wisp 2.2.2
- gleam-wisp wisp 2.2.2
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 7 mo ago
Exploit prediction
0.63% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.7 | 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 |
| CNA | 4.0 | 8.7 | 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 |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| hex | wisp | <2.2.2 >=0.2.0, <2.2.2 |
2.2.2 |
Affected products
- gleam-wisp wisp
Classification
- Weakness
-
- CWE-770 Allocation of Resources Without Limits or Throttling
References
-
github.com
/gleam-wisp/wisp/commit/7a978748e12ab29db232c222254465890e1a4a90
patch, web
-
cna.erlef.org
/cves/CVE-2026-32145.html
related, web, patch, third-party-advisory
-
github.com
/gleam-wisp/wisp/security/advisories/GHSA-8645-p2v4-73r2
vendor-advisory, related, web, advisory
-
osv.dev
/vulnerability/EEF-CVE-2026-32145
related, web, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-32145
advisory
-
github.com
/gleam-wisp/wisp
package
-
hex.pm
/packages/wisp
package
Sources
- CVE List CVE-2026-32145
- GitHub Advisory GHSA-8645-p2v4-73r2
- NVD CVE-2026-32145
- OSV EEF-CVE-2026-32145
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.