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MEDIUM severity

Hashicorp Consul vulnerable to denial of serviceGHSA-c57c-7hrj-6q6v

MEDIUM

GHSA-c57c-7hrj-6q6v is a medium-severity (CVSS 4.9) CWE-826 vulnerability in github.com/hashicorp/consul. A fix is available for github.com/hashicorp/consul — see the affected versions and patch details below.

Also known asBIT-consul-2023-1297CVE-2023-1297GO-2023-1827
Published
Updated
Affected
2 pkgs
Patched
2 / 2
Exploits
None indexed
Exploitation data as of Nov 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for GHSA-c57c-7hrj-6q6v.

EPSS Exploitation Probability

via FIRST.org ↗
0.8%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs56th percentile — riskier than 56% of all scored CVEsHighest risk
0.00%0.42%0.85%1.27%0.2%0.8%May 26Sep 26Nov 26

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

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

Consul and Consul Enterprise's cluster peering implementation contained a flaw whereby a peer cluster with service of the same name as a local service could corrupt Consul state, resulting in denial of service. This vulnerability was resolved in Consul 1.14.5, and 1.15.3

Affected Packages

2 total 2 fixed
EcosystemPackageVulnerable rangeFix
🐹Gogithub.com/hashicorp/consulall versions1.14.5go get github.com/hashicorp/consul@v1.14.5
🐹Gogithub.com/hashicorp/consul≥ 1.15.0&&< 1.15.31.15.3go get github.com/hashicorp/consul@v1.15.3

Affected Products

1 product · 4 configurations
Application
consulhashicorp
≥ 1.15.0 && < 1.15.3
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 1.14.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-c57c-7hrj-6q6v 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

Consul and Consul Enterprise's cluster peering implementation contained a flaw whereby a peer cluster with service of the same name as a local service could corrupt Consul state, resulting in denial of service. This vulnerability was resolved in Consul 1.14.5, and 1.15.3
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Hashicorp Consul vulnerable to denial of service