# CVE-2026-32285: buger jsonparser denial of service via negative slice index panic

Source: https://junglewise.ai/threats/cve-2026-32285-buger-jsonparser-denial-of-service-via-negative-slice-index-panic  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-03-26. Updated: 2026-06-30  
License: CC BY 4.0 with a link back

CVE-2026-32285 · Severity: high · CVSS 7.5 · Published 2026-03-26

A vulnerability in a widely used Go library for processing JSON data can allow an attacker to crash applications that use it. By sending a specially crafted, malformed JSON payload, an attacker can trigger a system error that shuts down the service, leading to a denial of service. This affects several Red Hat cloud management products that incorporate the vulnerable library.

Technologies: [github.com/buger/jsonparser (Go)](https://junglewise.ai/threats/technologies/github-com-buger-jsonparser), [Red Hat Multicluster Global Hub](https://junglewise.ai/threats/technologies/multicluster-global-hub). Vendors: [Go](https://junglewise.ai/threats/vendors/go), [Red Hat](https://junglewise.ai/threats/vendors/red-hat).

## Quick answers

**Is CVE-2026-32285 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-32285 being exploited in the wild.

**How severe is CVE-2026-32285?** High severity, with a CVSS score of 7.5, published 26 March 2026.

**Which products and versions are affected?** github.com/buger/jsonparser (Go) <= 1.1.1, SEMVER:introduced=0,fixed=1.1.2; Red Hat Multicluster Global Hub 1.3.4, 1.4.5, 1.5.4, 1.6.2.

**Is there a fix for CVE-2026-32285?** Yes. github.com/buger/jsonparser (Go): upgrade to 1.1.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-32285 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-32285?** Check whether you run github.com/buger/jsonparser (Go), Jsonparser Project Jsonparser or Red Hat Multicluster Global Hub at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- github.com/buger/jsonparser (Go): upgrade to 1.1.2 or later

  ```sh
  go get github.com/buger/jsonparser@v1.1.2
  ```


## Technical details

A denial of service vulnerability exists in the github.com/buger/jsonparser library due to improper validation of array indexes (CWE-129/CWE-1285). The Delete() function in parser.go computes an offset that can become negative when processing malformed JSON input. Because this negative value is used as a slice index without a lower-bound check, it triggers a Go runtime panic ("slice bounds out of range [-1:]"). An unauthenticated remote attacker can exploit this by providing a malformed JSON payload to any service that calls Delete() on untrusted input. This issue is distinct from the infinite loop bug addressed in CVE-2020-10675. The vulnerability is fixed in version 1.1.2.

## Affected products

- buger jsonparser before v1.1.2
- Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.15
- Red Hat Multicluster Global Hub 1.3.4, 1.4.5, 1.5.4, 1.6.2
- Red Hat multicluster engine for Kubernetes 2.8, 2.10

## Identifiers

- CVE-2026-32285
- GHSA-6g7g-w4f8-9c9x
- GO-2026-4514

## Timeline

- 2026-02-19: disclosed: Issue reported on GitHub and Go vulnerability database
- 2026-03-16: advisory: Go vulnerability report GO-2026-4514 published
- 2026-03-26: advisory: CVE-2026-32285 published to NVD
- 2026-05-04: patched: Red Hat released security updates for Advanced Cluster Management

## References

- [https://pkg.go.dev/](https://pkg.go.dev/)
- [https://github.com/buger/jsonparser/issues/275](https://github.com/buger/jsonparser/issues/275)
- [https://github.com/golang/vulndb/issues/4514](https://github.com/golang/vulndb/issues/4514)
- [https://pkg.go.dev/vuln/GO-2026-4514](https://pkg.go.dev/vuln/GO-2026-4514)
- [https://access.redhat.com/errata/RHSA-2026:13548](https://access.redhat.com/errata/RHSA-2026:13548)
- [https://access.redhat.com/errata/RHSA-2026:17121](https://access.redhat.com/errata/RHSA-2026:17121)
- [https://access.redhat.com/errata/RHSA-2026:17123](https://access.redhat.com/errata/RHSA-2026:17123)

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