Panic when decoding large WEBP image on 32-bit platforms in golang.org/x/image
Priority LOW 39Published · 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
- Partial Red Hat: 8 fixed, 5 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.
Summary
Parsing a WEBP image with an invalid, large size panics on 32-bit platforms.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0034 27th percentileScored 2026-11-07
Fix Partial golang.org/x/image/webp (golang.org/x/image): 0.42.0Red Hat: 9 advisoriesRed Hat: 8 fixed, 5 without a fix
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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Go standard library | golang.org/x/image/webp | before 0.42.0 | 0.42.0 | Patch available | CNA |
- golang.org/x/image/webp VendorGo standard library Affected before 0.42.0 Fixed in 0.42.0 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:golang:image:*:*:*:*:*:go:*:* | before 0.39.0 | Vulnerable | Go standard library |
- cpe:2.3:a:golang:image:*:*:*:*:*:go:*:* Versions before 0.39.0 Vulnerable ·Go standard library
Remediation
- Fix · CNA golang.org/x/image/webp (golang.org/x/image) Fixed in 0.42.0
Red Hat 9 advisories
- RHSA-2026:56340 Released 2026-08-18 · Red Hat rating ImportantLogging for Red Hat OpenShift - 6.5.2
- Logging Subsystem for Red Hat OpenShift 6.5 registry.redhat.io/openshift-logging/cluster-logging-rhel9-operator, registry.redhat.io/openshift-logging/eventrouter-rhel9, registry.redhat.io/openshift-logging/logging-loki-rhel9 +3
- RHSA-2026:34364 Released 2026-07-01 · Red Hat rating ImportantLogging for Red Hat OpenShift - 6.4.6
- Logging Subsystem for Red Hat OpenShift 6.4 registry.redhat.io/openshift-logging/cluster-logging-rhel9-operator, registry.redhat.io/openshift-logging/eventrouter-rhel9, registry.redhat.io/openshift-logging/logging-loki-rhel9 +2
- RHSA-2026:24503 Released 2026-06-08 · Red Hat rating ImportantMulticluster Global Hub 1.7.1 security update
- Multicluster Global Hub 1.7.4 registry.redhat.io/multicluster-globalhub/multicluster-globalhub-grafana-rhel9
Show 6 more Red Hat advisories
- RHSA-2026:23345 Released 2026-06-04 · Red Hat rating ImportantMulticluster Global Hub 1.6.2 security update
- Multicluster Global Hub 1.6.6 registry.redhat.io/multicluster-globalhub/multicluster-globalhub-agent-rhel9, registry.redhat.io/multicluster-globalhub/multicluster-globalhub-grafana-rhel9, registry.redhat.io/multicluster-globalhub/multicluster-globalhub-manager-rhel9 +1
- RHSA-2026:22347 Released 2026-06-01 · Red Hat rating ImportantMulticluster Global Hub 1.4.5 security update
- Multicluster Global Hub 1.4.9 registry.redhat.io/multicluster-globalhub/multicluster-globalhub-agent-rhel9, registry.redhat.io/multicluster-globalhub/multicluster-globalhub-grafana-rhel9, registry.redhat.io/multicluster-globalhub/multicluster-globalhub-manager-rhel9 +1
- RHSA-2026:21769 Released 2026-05-28 · Red Hat rating ImportantMulticluster Global Hub 1.5.4 security update
- Multicluster Global Hub 1.5.8 registry.redhat.io/multicluster-globalhub/multicluster-globalhub-agent-rhel9, registry.redhat.io/multicluster-globalhub/multicluster-globalhub-grafana-rhel9, registry.redhat.io/multicluster-globalhub/multicluster-globalhub-manager-rhel9 +1
- RHSA-2026:17789 Released 2026-05-26 · Red Hat rating ImportantRed Hat build of Cryostat 4.2.0: new RHEL 9 container image security update
- Cryostat 4 on RHEL 9 cryostat/cryostat-grafana-dashboard-rhel9, cryostat/cryostat-openshift-console-plugin-rhel9, cryostat/cryostat-reports-rhel9 +4
- RHSA-2026:8291 Released 2026-04-15 · Red Hat rating ImportantRed Hat Hardened Images RPMs bug fix and enhancement update
- Red Hat Hardened Images golang1.26-1.26.2-1.1.hum1@aarch64, golang1.26-1.26.2-1.1.hum1@src, golang1.26-1.26.2-1.1.hum1@x86_64 +12
- RHSA-2026:7385 Released 2026-04-10 · Red Hat rating ImportantRed Hat Hardened Images RPMs bug fix and enhancement update
- Red Hat Hardened Images golang1.25-1.25.9-1.hum1@aarch64, golang1.25-1.25.9-1.hum1@src, golang1.25-1.25.9-1.hum1@x86_64 +12
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| OpenShift Serverless | Affected | No fix yet |
| Red Hat Advanced Cluster Management for Kubernetes 2 | Affected | No fix yet |
| Red Hat Enterprise Linux 8 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux AI (RHEL AI) 3 | Affected | No fix yet |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet |
| Cryostat 4 on RHEL 9 | Fixed | RHSA-2026:17789 |
| Logging Subsystem for Red Hat OpenShift 6.4 | Fixed | RHSA-2026:34364 |
| Logging Subsystem for Red Hat OpenShift 6.5 | Fixed | RHSA-2026:56340 |
| Multicluster Global Hub 1.4.9 | Fixed | RHSA-2026:22347 |
| Multicluster Global Hub 1.5.8 | Fixed | RHSA-2026:21769 |
| Multicluster Global Hub 1.6.6 | Fixed | RHSA-2026:23345 |
| Multicluster Global Hub 1.7.4 | Fixed | RHSA-2026:24503 |
| Red Hat Hardened Images | Fixed | RHSA-2026:7385, RHSA-2026:8291 |
Not affected: 19 products
- Cryostat 4 on RHEL 9
- Logging Subsystem for Red Hat OpenShift 6.4
- Logging Subsystem for Red Hat OpenShift 6.5
- Multicluster Global Hub 1.4.9
- Multicluster Global Hub 1.5.8
- Multicluster Global Hub 1.6.6
- Multicluster Global Hub 1.7.4
- OpenShift Service Mesh 2
- OpenShift Service Mesh 3
- Red Hat Advanced Cluster Management for Kubernetes 2
- Red Hat Ansible Automation Platform 2
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 9
- Red Hat Hardened Images
- Red Hat OpenShift AI (RHOAI)
- Red Hat OpenShift Container Platform 4
- Red Hat OpenShift GitOps
- Red Hat OpenShift Virtualization 4
- Red Hat OpenStack Platform 18.0
Timeline
- 2026-10-02 Threatist record created from CVE-2026-33813
- 2026-10-25 Priority changed: MEDIUM → LOW
- 2026-11-06 Fix available: Multicluster Global Hub 1.7.4 · Red Hat
References
More Go standard library Image vulnerabilities
- TI-2023-13788 Excessive resource consumption in golang.org/x/image/tiff CVSS 3.1MEDIUM 6.5
- TI-2023-13787 Excessive CPU consumption when decoding 0-height images in golang.org/x/image/tiff CVSS 3.1MEDIUM 6.5
- TI-2026-26184 Excessive memory allocation when decoding malicious SFNT in golang.org/x/image CVSS 3.1MEDIUM 6.1
- TI-2022-20117 Denial of service via crafted TIFF image in golang.org/x/image/tiff CVSS 3.1MEDIUM 5.5
Sources
- CVE-2026-33813 · CVE Program
- CVE-2026-33813 · NVD
- FIRST EPSS
- CVE-2026-33813 · Red Hat security data · CC BY 4.0
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