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TI-2026-34260 Aliases CVE-2026-46601GHSA-m43h-mp45-ghq6

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

Priority MEDIUM 40Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.

Summary

The webp decoder can panic when processing a VP8 chunk with dimensions that do not match the canvas size.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00609 49th percentileScored 2026-11-07
Fix Fixed golang.org/x/image/webp (golang.org/x/image): 0.43.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Go standard librarygolang.org/x/image/webpbefore 0.43.00.43.0Patch availableCNA
Go standard librarygolang.org/x/image/webpbefore 0.43.00.43.0Patch availableCNA
  • golang.org/x/image/webp VendorGo standard library Affected before 0.43.0 Fixed in 0.43.0 Patch available CNA
  • golang.org/x/image/webp VendorGo standard library Affected before 0.43.0 Fixed in 0.43.0 Patch available CNA

Remediation

  • Fix · CNA golang.org/x/image/webp (golang.org/x/image) Fixed in 0.43.0
  • Fix · CNA golang.org/x/image/webp (golang.org/x/image) Fixed in 0.43.0

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Not affected: 2 products
  • Cryostat 4
  • Red Hat Advanced Cluster Management for Kubernetes 2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-46601
  2. 2026-10-03 Alias added: GHSA-m43h-mp45-ghq6

References

Other 3

  • TI-2020-00578 Improper certificate validation in Microsoft Windows KEVCVSS 3.1HIGH 8.1
  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
  • TI-2023-24278 HTTP/2 CONTINUATION flood in net/http CVSS 3.1HIGH 7.5
  • TI-2018-05208 The "go get" implementation in Go 1.9.4, when the -insecure command-line option is used… CVSS 3.1HIGH 8.8
  • TI-2024-16309 Panic when parsing invalid palette-color images in golang.org/x/image CVSS 3.1HIGH 7.5
  • TI-2022-20112 Request smuggling due to improper request handling in golang.org/x/net/http2/h2c CVSS 3.1HIGH 7.5
See all 297 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences