Panic when decoding large WEBP image on 32-bit platforms in golang.org/x/image
Summary
| CVE | CVE-2026-33813 |
|---|---|
| State | PUBLISHED |
| Assigner | Go |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-04-21 20:16:56 UTC |
| Updated | 2026-04-22 21:24:26 UTC |
| Description | Parsing a WEBP image with an invalid, large size panics on 32-bit platforms. |
Risk And Classification
Primary CVSS: v3.1 7.5 HIGH from ADP
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.000190000 probability, percentile 0.051710000 (date 2026-04-22)
Problem Types: CWE-190: Integer Overflow or Wraparound
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | ADP | DECLARED | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | Secondary | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Golang.orgximage | Golang.org/x/image/webp | affected 0.39.0 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| go.dev/issue/78407 | [email protected] | go.dev | |
| pkg.go.dev/vuln/GO-2026-4961 | [email protected] | pkg.go.dev | |
| go.dev/cl/759860 | [email protected] | go.dev | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Tristan Madani (en)
There are currently no legacy QID mappings associated with this CVE.