Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2026-48819

4.8 · MEDIUM

Hey API is an ecosystem for turning API specifications into production-ready code.

Published Jul 17, 2026CWE-1321EPSS 0.35%

Overview

CVE-2026-48819 is a medium-severity vulnerability. It was published on July 17, 2026 and has a CVSS 3.1 base score of 4.8 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 4.8, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Hey API is an ecosystem for turning API specifications into production-ready code. Prior to 0.97.3, dist/clients/core/params.ts ships a runtime template copied into generated SDKs as params.gen.ts, and buildClientParams writes unknown slot-prefixed keys such as $body_, $headers_, $path_, and $query_ directly to the corresponding slot, allowing $query___proto__ alongside a legitimate q field to set params.query through params["query"]["__proto__"] = value, call Object.setPrototypeOf(params.query, value), and expose inherited attacker-controlled keys during for..in iteration. This issue is fixed in version 0.97.3.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/hey-api/hey-api/commit/023909137a15eff9c0263d3bcd116140076b214fGitHubgithub.com/hey-api/hey-api/commit/da321a1529eb3c90d2109da870f514b915a60169GitHubgithub.com/hey-api/hey-api/releases/tag/%40hey-api%2Fopenapi-ts%400.97.3GitHubgithub.com/hey-api/hey-api/security/advisories/GHSA-hhx9-57xq-r5rwGitHubgithub.com/hey-api/hey-api/security/advisories/GHSA-hhx9-57xq-r5rw

How CyberStrike helps

Frequently asked questions

What is CVE-2026-48819?

CVE-2026-48819 is a medium-severity vulnerability. It was published on July 17, 2026 and has a CVSS 3.1 base score of 4.8 (MEDIUM).

How severe is CVE-2026-48819?

This vulnerability has a CVSS 3.1 base score of 4.8, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-48819?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-48819?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-48819 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related MEDIUM CVEs from 2026

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999