How severe is CVE-2024-45388?

CVE-2024-45388 has a CVSS score of 7.5/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2024-45388?

CVE-2024-45388 affects the following packages: github.com/spectolabs/hoverfly (Go), github.com/SpectoLabs/hoverfly (Go). Ecosystems affected: Go.

How do I fix CVE-2024-45388?

Update github.com/spectolabs/hoverfly to version 1.10.3 or later. Run your dependency manager's update command and verify no transitive dependencies pin the vulnerable version. Use O3 Security's SCA scanner to confirm the fix is applied across your entire dependency tree.

Is CVE-2024-45388 actively exploited in the wild?

Yes. There are 1 known exploit references for CVE-2024-45388, including 1 in-the-wild exploitation observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2024-45388?

CVE-2024-45388 has an EPSS (Exploit Prediction Scoring System) score of 93.6%, placing it in the 100th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

Is there exploit tooling available for CVE-2024-45388?

A Nuclei detection template exists for CVE-2024-45388, meaning automated scanners can fingerprint it. Public exploit tooling significantly increases real-world risk — prioritize patching and ensure detection coverage. Exploit tooling should only ever be used in isolated, authorized testing environments.

When was CVE-2024-45388 published, and has it been updated?

CVE-2024-45388 was published on September 2, 2024 and was last updated on April 10, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐹 Go

CVE-2024-45388

HIGH

Arbitrary file read in the `/api/v2/simulation` endpoint in hoverfly (`GHSL-2023-274`)

Also known asGHSA-6xx4-x46f-f897GO-2024-3108

Published

Sep 2, 2024

Updated

Apr 10, 2026

Affected

2 pkgs

Patched

2 / 2

Exploits

1 known

EPSS Exploitation Probability

via FIRST.org ↗

93.6%probability of exploitation in next 30 days

Very High Risk100th percentile0.00%

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.

Blast Radius

2 pkgs affected

🐹github.com/spectolabs/hoverfly🐹github.com/SpectoLabs/hoverfly

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

Hoverfly is a lightweight service virtualization/ API simulation / API mocking tool for developers and testers. The /api/v2/simulation POST handler allows users to create new simulation views from the contents of a user-specified file. This feature can be abused by an attacker to read arbitrary files from the Hoverfly server. Note that, although the code prevents absolute paths from being specified, an attacker can escape out of the hf.Cfg.ResponsesBodyFilesPath base path by using ../ segments and reach any arbitrary files. This issue was found using the Uncontrolled data used in path expression CodeQL query for python. Users are advised to make sure the final path (filepath.Join(hf.Cfg.ResponsesBodyFilesPath, filePath)) is contained within the expected base path (filepath.Join(hf.Cfg.ResponsesBodyFilesPath, "/")). This issue is also tracked as GHSL-2023-274.

Affected Packages

2 total 2 fixed

Ecosystem	Package	Vulnerable range	Fix
🐹Go	`github.com/spectolabs/hoverfly`	all versions	1.10.3
🐹Go	`github.com/SpectoLabs/hoverfly`	all versions	1.10.3

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

Hoverfly is a lightweight service virtualization/ API simulation / API m…

github.comNVDSep 2024

Frequently Asked Questions

Hoverfly is a lightweight service virtualization/ API simulation / API mocking tool for developers and testers. The `/api/v2/simulation` POST handler allows users to create new simulation views from the contents of a user-specified file. This feature can be abused by an attacker to read arbitrary files from the Hoverfly server. Note that, although the code prevents absolute paths from being specified, an attacker can escape out of the `hf.Cfg.ResponsesBodyFilesPath` base path by using `../` segments and reach any arbitrary files. This issue was found using the Uncontrolled data used in path ex

O3 Security · Impact-Aware SCA

Is CVE-2024-45388 in your stack?

O3 detects CVE-2024-45388 across Go dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

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