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HIGH severity

CVE-2020-13250 — consul

HIGHFix: hashicorp/consul#8023

CVE-2020-13250 is a high-severity (CVSS 7.5) CWE-770 vulnerability in github.com/hashicorp/consul. A fix is available for github.com/hashicorp/consul — see the affected versions and patch details below.

Allocation of Resources Without Limits or Throttling in Hashicorp Consul

Also known asBIT-consul-2020-13250GHSA-rqjq-mrgx-85hpGO-2022-0879
Published
Updated
Affected
2 pkgs
Patched
2 / 2
Exploits
None indexed
Exploitation data as of Oct 7, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
2.9%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs86th percentile — riskier than 86% of all scored CVEsHighest risk
0.27%1.33%2.39%3.45%0.9%2.9%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2020-13250 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,738 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

2 pkgs affected
🐹github.com/hashicorp/consul🐹github.com/hashicorp/consul

Real-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

HashiCorp Consul and Consul Enterprise include an HTTP API (introduced in 1.2.0) and DNS (introduced in 1.4.3) caching feature that was vulnerable to denial of service.

Specific Go Packages Affected

github.com/hashicorp/consul/agent/config

Fix

The vulnerability is fixed in versions 1.6.6 and 1.7.4.

Affected Packages

2 total 2 fixed
EcosystemPackageVulnerable rangeFix
🐹Gogithub.com/hashicorp/consul≥ 1.2.0&&< 1.6.61.6.6go get github.com/hashicorp/consul@v1.6.6
🐹Gogithub.com/hashicorp/consul≥ 1.7.0&&< 1.7.41.7.4go get github.com/hashicorp/consul@v1.7.4

Affected Products

1 product · 4 configurations
Application
consulhashicorp
≥ 1.7.0 && < 1.7.4
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/hashicorp/consul, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update github.com/hashicorp/consul to 1.6.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2020-13250 is resolved across your whole dependency graph.

  3. 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.

Frequently Asked Questions

HashiCorp Consul and Consul Enterprise include an HTTP API (introduced in 1.2.0) and DNS (introduced in 1.4.3) caching feature that was vulnerable to denial of service. ### Specific Go Packages Affected github.com/hashicorp/consul/agent/config ### Fix The vulnerability is fixed in versions 1.6.6 and 1.7.4.
O3 Security · Impact-Aware SCA

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CVE-2020-13250: consul DoS — Fixed in 1.6.6