Panic on VP8 alpha channel size mismatch in x/image/webp in golang.org/x/image

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Summary

CVECVE-2026-46601
StatePUBLISHED
AssignerGo
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-25 20:17:12 UTC
Updated2026-06-26 17:16:33 UTC
DescriptionThe webp decoder can panic when processing a VP8 chunk with dimensions that do not match the canvas size.

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

Problem Types: CWE-125: Out-of-bounds Read

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Golang.orgximage Golang.org/x/image/webp affected 0.43.0 semver Not specified
CNA Golang.orgximage Golang.org/x/image/webp affected 0.43.0 semver Not specified

References

ReferenceSourceLinkTags
go.dev/cl/787681 [email protected] go.dev
go.dev/issue/79869 [email protected] go.dev
pkg.go.dev/vuln/GO-2026-5061 [email protected] pkg.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: Lucas Futures (GitHub: gn00295120) (en)

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