Vulnerability · Published Jun 25, 2026 · Assigned by Go
CVE-2026-46601Panic on VP8 alpha channel size mismatch in x/image/webp in golang.org/x/image
High 7.5
In plain English
A high-severity security flaw in golang.org/x/image/webp from golang.org/x/image. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.6%top 50.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
The webp decoder can panic when processing a VP8 chunk with dimensions that do not match the canvas size.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | golang-golang-x-image | no fix listed | DEBIAN-CVE-2026-46601 |
| Debian:13 | golang-golang-x-image | no fix listed | DEBIAN-CVE-2026-46601 |
| Debian:14 | golang-golang-x-image | 0.45.0-1 | DEBIAN-CVE-2026-46601 |
| Go | golang.org/x/image | 0.43.0 | GO-2026-5061 |
| Ubuntu:22.04:LTS | golang-golang-x-image | no fix listed | UBUNTU-CVE-2026-46601 |
| Ubuntu:24.04:LTS | golang-golang-x-image | no fix listed | UBUNTU-CVE-2026-46601 |
| Ubuntu:25.10 | golang-golang-x-image | no fix listed | UBUNTU-CVE-2026-46601 |
| Ubuntu:26.04:LTS | golang-golang-x-image | no fix listed | UBUNTU-CVE-2026-46601 |
| Ubuntu:26.10 | golang-golang-x-image | no fix listed | UBUNTU-CVE-2026-46601 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| golang.org/x/image | golang.org/x/image/webp | 0 – before 0.43.0 |
| golang.org/x/image | golang.org/x/image/webp | 0 – before 0.43.0 |