CVE-2026-32285 — jsonparser
HIGHCVE-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
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
CVE-2026-32285 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 377,333 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
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 |
Detection & 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
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2026-32285 can be triaged on real exposure rather than presence alone.
Tailored to CVE-2026-32285. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
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.
| Product | Fixed in | Advisory |
|---|---|---|
| Cluster Observability Operator 1.5.0 | cluster-observability-operator/prometheus-rhel9:1787593705 | RHSA-2026:61314 |
| Logging Subsystem for Red Hat OpenShift 6.4 | openshift-logging/logging-loki-rhel9:1782405469 | RHSA-2026:34364 |
| multicluster engine for Kubernetes 2.1 | 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 1.4.5 | multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1779579439 | RHSA-2026:22347 |
| Multicluster Global Hub 1.6.5 | multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1780167118 | RHSA-2026:23345 |
Frequently Asked Questions
Is CVE-2026-32285 in your dependencies?
O3 Security finds CVE-2026-32285 across Go dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.