High severity · published Apr 21, 2026
CVE-2026-33813
Panic when decoding large WEBP image on 32-bit platforms in golang.org/x/image
7.5
CVSS
0.3%
EPSS
No
On KEV
Description
Parsing a WEBP image with an invalid, large size panics on 32-bit platforms.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 27% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GO
golang.org/x/image/webp · golang.org/x/image
before 0.42.0 · source: vendor
IM
Image · Golang
before 0.39.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-33813
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-33813
Patch
https://go.dev/cl/759860
go.dev
https://go.dev/cl/780860
Issue Tracking
https://go.dev/issue/78407
Vendor Advisory
https://pkg.go.dev/vuln/GO-2026-4961
More from golang.org/x/image/webp
7.5
CVE-2026-46601
Panic on VP8 alpha channel size mismatch in x/image/webp in golang.org/x/image