CVE-2024-45388: Hoverfly is a lightweight service virtualization/ API simulation / API mocking tool for developers and testers

Q: How do I fix CVE-2024-45388?

hoverfly: upgrade to 1.10.3. Exact commands for each OS are on this page.

Q: Is CVE-2024-45388 being exploited?

CVE-2024-45388 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2024-45388 affect?

CVE-2024-45388 affects hoverfly. Severity is high (CVSS 7.5). 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. Th

Q: How urgent is CVE-2024-45388?

Priority 61/100. High severity; EPSS top 1%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2024-45388 is a high-severity flaw (CVSS 7.5) affecting hoverfly. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.Res

Why this priority

High severity
EPSS top 1%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	55.6% (top 1%)
CISA exploited list	No
Weakness	CWE-200, CWE-22
Published	2024-09-02
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: hoverfly

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-09-02 18:15 UTCPublished CVE record published
2026-06-17 07:54 UTCUpdated Record last modified

hoverfly hoverfly UPGRADE

Affected: < 1.10.3

Fixed in: 1.10.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy hoverfly || rpm -q hoverfly || hoverfly --version

2. UPGRADE to 1.10.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade hoverfly

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade hoverfly

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Nuclei scan template: Hoverfly < 1.10.3 - Arbitrary File Read

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-45388?

hoverfly: upgrade to 1.10.3. Exact commands for each OS are on this page.

Is CVE-2024-45388 being exploited?

CVE-2024-45388 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-45388 affect?

CVE-2024-45388 affects hoverfly. Severity is high (CVSS 7.5). 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. Th

How urgent is CVE-2024-45388?

Priority 61/100. High severity; EPSS top 1%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-54376 HIGH 7.5 UPGRADE Hoverfly is an open source API simulation tool
CVE-2025-54123 CRITICAL 9.8 UPGRADE Hoverfly is an open source API simulation tool

References

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