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Fencer Vulns
high 7.5

CVE-2026-46601 json

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

published 2026-06-18 4 mo ago modified 2026-10-25 14 d ago also EUVD-2026-39550 , GO-2026-5061

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 49%
public exploits
0
none known

Summary

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

Patch / fix

  • go golang.org/x/image 0.43.0
  • golang.org/x/image golang.org/x/image/webp 0.43.0
  • golang-golang-x-image Debian 14 0.45.0-1

debian advisories DEBIAN-CVE-2026-46601

  • govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1

opensuse advisories openSUSE-SU-2026:21483-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-46601 updated cvss 6.5

golang.org/x/image/webp: golang.org/x/image/webp: Denial of Service via malformed VP8 chunk in WebP images

  • Red Hat Cryostat 4 cryostat/cryostat-storage-rhel9 Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/volsync-rhel9
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
4 mo ago

Exploit prediction

0.61% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
go golang.org/x/image
<0.43.0
0.43.0

Affected products

  • golang.org/x/image golang.org/x/image/webp

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.