CVE-2023-7079

Arbitrary remote file read in Wrangler dev server

Description

Sending specially crafted HTTP requests and inspector messages to Wrangler's dev server could result in any file on the user's computer being accessible over the local network. An attacker that could trick any user on the local network into opening a malicious website could also read any file.

Remediation

Workaround:

  • Configure Wrangler to listen on local interfaces instead with wrangler dev --ip 127.0.0.1. This is the default as of wrangler@3.16.0 https://github.com/cloudflare/workers-sdk/security/advisories/GHSA-f8mp-x433-5wpf , and removes the local network as an attack vector, but does not prevent an attack from visiting a malicious website.

Category

6.4
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.06%
Third-Party Advisory github.com
Affected: Cloudflare wrangler
Published at:
Updated at:

References

Link Tags
https://github.com/cloudflare/workers-sdk/security/advisories/GHSA-cfph-4qqh-w828 third party advisory patch
https://github.com/cloudflare/workers-sdk/pull/4532 patch
https://github.com/cloudflare/workers-sdk/pull/4535 patch

Frequently Asked Questions

What is the severity of CVE-2023-7079?
CVE-2023-7079 has been scored as a medium severity vulnerability.
How to fix CVE-2023-7079?
As a workaround for remediating CVE-2023-7079: Configure Wrangler to listen on local interfaces instead with wrangler dev --ip 127.0.0.1. This is the default as of wrangler@3.16.0 https://github.com/cloudflare/workers-sdk/security/advisories/GHSA-f8mp-x433-5wpf , and removes the local network as an attack vector, but does not prevent an attack from visiting a malicious website.
Is CVE-2023-7079 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-7079 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-7079?
CVE-2023-7079 affects Cloudflare wrangler.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.