CVE-2026-32285 is a high-severity (CVSS 7.5) CWE-129 vulnerability in github.com/buger/jsonparser. A fix is available for github.com/buger/jsonparser — see the affected versions and patch details below.
Denial of service in github.com/buger/jsonparser
Exploitation Status
Proof-of-concept exploit code exists
- CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
Exploitation and automatability from CISA’s SSVC triage for CVE-2026-32285.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
github.com/buger/jsonparserReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.
Description
The Delete function fails to properly validate offsets when processing malformed JSON input. This can lead to a negative slice index and a runtime panic, allowing a denial of service attack.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/buger/jsonparser | all versions | 1.1.2go get github.com/buger/jsonparser@v1.1.2 |
Affected Products
jsonparserjsonparser_projectDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/buger/jsonparser, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/buger/jsonparser to 1.1.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-32285 is resolved across your whole dependency graph.
Workarounds
Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.
Fixing This On Your OS
If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.Source: Red Hat security advisory for CVE-2026-32285 (CC BY 4.0)
| Product | Fixed in | Advisory |
|---|---|---|
| Cluster Observability Operator 1.5 | cluster-observability-operator/prometheus-rhel9:1787593705 | RHSA-2026:61314 |
| Logging Subsystem for Red Hat OpenShift 6.0 | openshift-logging/logging-loki-rhel9:1791500729 | RHSA-2026:83013 |
| Logging Subsystem for Red Hat OpenShift 6.4 | openshift-logging/logging-loki-rhel9:1782405469 | RHSA-2026:34364 |
| multicluster engine for Kubernetes 2.10 | multicluster-engine/assisted-service-9-rhel9:1779135478 | RHSA-2026:19099 |
| multicluster engine for Kubernetes 2.8 | multicluster-engine/assisted-service-8-rhel8:1778288655 | RHSA-2026:17121 |
| multicluster engine for Kubernetes 2.8 | multicluster-engine/assisted-service-9-rhel9:1778288646 | RHSA-2026:17123 |
| Multicluster Global Hub 1.3.4 | multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1779212259 | RHSA-2026:22423 |
| Multicluster Global Hub 1.4.9 | multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1779579439 | RHSA-2026:22347 |
Frequently Asked Questions
Is CVE-2026-32285 in your dependencies?
Find it across Go, including transitive dependencies.