How severe is GHSA-7mvr-c777-76hp?

No CVSS score has been assigned to GHSA-7mvr-c777-76hp yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-7mvr-c777-76hp?

GHSA-7mvr-c777-76hp affects the following packages: playwright (npm). Ecosystems affected: npm.

How do I fix GHSA-7mvr-c777-76hp?

Update playwright to 1.55.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-7mvr-c777-76hp is resolved across your whole dependency graph.

How do I detect GHSA-7mvr-c777-76hp in my npm dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for playwright. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

How do I mitigate GHSA-7mvr-c777-76hp if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

How does O3 Security protect against GHSA-7mvr-c777-76hp?

O3 pinpoints whether GHSA-7mvr-c777-76hp is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Is GHSA-7mvr-c777-76hp actively exploited in the wild?

No public exploit code has been indexed for GHSA-7mvr-c777-76hp yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for GHSA-7mvr-c777-76hp?

GHSA-7mvr-c777-76hp has an EPSS (Exploit Prediction Scoring System) score of 0.2%, placing it in the 12th 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. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is GHSA-7mvr-c777-76hp?

GHSA-7mvr-c777-76hp is classified as CWE-347 (CWE-347). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was GHSA-7mvr-c777-76hp published, and has it been updated?

GHSA-7mvr-c777-76hp was published on October 14, 2025 and was last updated on February 4, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

GHSA-7mvr-c777-76hp: playwright Remote Code Execution

EPSS Exploitation Probability

via FIRST.org ↗

0.2%probability of exploitation in next 30 days

Lower Risk12th percentile+0.18%

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

1 pkg affected

📦playwright

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects npm packages — download data is not available via public APIs for these ecosystems.

Description

Summary

Use of curl with the -k (or --insecure) flag in installer scripts allows attackers to deliver arbitrary executables via Man-in-the-Middle (MitM) attacks. This can lead to full system compromise, as the downloaded files are installed as privileged applications.

Details

The following scripts in the microsoft/playwright repository at commit bee11cbc28f24bd18e726163d0b9b1571b4f26a8 use curl -k to fetch and install executable packages without verifying the authenticity of the SSL certificate:

In each case, the shell scripts download a browser installer package using curl -k and immediately install it:

curl --retry 3 -o ./<pkg-file> -k <url>
sudo installer -pkg /tmp/<pkg-file> -target /

Disabling SSL verification (-k) means the download can be intercepted and replaced with malicious content.

PoC

A high-level exploitation scenario:

An attacker performs a MitM attack on a network where the victim runs one of these scripts.
The attacker intercepts the HTTPS request and serves a malicious package (for example, a trojaned browser installer).
Because curl -k is used, the script downloads and installs the attacker's payload without any certificate validation.
The attacker's code is executed with system privileges, leading to full compromise.

No special configuration is needed: simply running these scripts on any untrusted or hostile network is enough.

Impact

This is a critical Remote Code Execution (RCE) vulnerability due to improper SSL certificate validation (CWE-295: Improper Certificate Validation). Any user or automation running these scripts is at risk of arbitrary code execution as root/admin, system compromise, data theft, or persistent malware installation. The risk is especially severe because browser packages are installed with elevated privileges and the scripts may be used in CI/CD or developer environments.

Fix

Credit

This vulnerability was uncovered by tooling by Socket
This vulnerability was confirmed by @evilpacket
This vulnerability was reported by @JLLeitschuh at Socket

Disclosure

September 10th, 2025 - Disclosed to Microsoft privately via https://github.com/microsoft/playwright/security/advisories/GHSA-gx27-2j22-qcx8
September 11th, 2025 - Reported to Microsoft via MSRC Researcher Portal - https://msrc.microsoft.com/report/vulnerability/VULN-162854
September 11th, 2025 - Microsoft closed report as "Complete - N/A"
September 18th, 2025 - Following a LinkedIn Post

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
📦npm	`playwright`	all versions	1.55.1

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for playwright. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update playwright to 1.55.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-7mvr-c777-76hp is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-7mvr-c777-76hp is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to GHSA-7mvr-c777-76hp. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

### Summary Use of `curl` with the `-k` (or `--insecure`) flag in installer scripts allows attackers to deliver arbitrary executables via Man-in-the-Middle (MitM) attacks. This can lead to full system compromise, as the downloaded files are installed as privileged applications. ### Details The following scripts in the `microsoft/playwright` repository at commit [`bee11cbc28f24bd18e726163d0b9b1571b4f26a8`](https://github.com/microsoft/playwright/commit/bee11cbc28f24bd18e726163d0b9b1571b4f26a8) use `curl -k` to fetch and install executable packages without verifying the authenticity of the SSL

O3 Security · Impact-Aware SCA

Is GHSA-7mvr-c777-76hp in your dependencies?

O3 detects GHSA-7mvr-c777-76hp across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

Scan my dependencies How O3 SCA works

GHSA-7mvr-c777-76hp