CVE-2023-7079

Arbitrary file read via unrestricted dev-server paths

Published Dec 29, 2023 · Updated Aug 2, 2024

Improper authentication in Cloudflare Wrangler 3.9.0 through 3.18.0 allows remote attackers to read arbitrary local files via its dev server. The dev server accepts crafted HTTP requests and inspector messages without restricting served paths to bundled files or source-map references. The server must be running; a local-network peer can reach a non-loopback listener, while a malicious website can target a loopback listener.

CVSS severity6.9
Medium
EPSS probability0.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in Cloudflare Wrangler 3.9.0 through 3.18.0 allows remote attackers to read arbitrary local files via its dev server. The dev server accepts crafted HTTP requests and inspector messages without restricting served paths to bundled files or source-map references. The server must be running; a local-network peer can reach a non-loopback listener, while a malicious website can target a loopback listener.

The record

CVE
CVE-2023-7079
Published
Dec 29, 2023
Updated
Aug 2, 2024
Vendor
Cloudflare
Product
Wrangler
Classifications
CWE-287, T1005
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 29, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <3.19.0 changes=[{"at":"3.19.0","status":"unaffected"}]
  2. Affected versionversion=0 <=3.9.0 changes=[{"at":"3.19.0","status":"unaffected"}]

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Cloudflare · Wranglerversion=0 <3.19.0 changes=[{"at":"3.19.0","status":"unaffected"}]; version=0 <=3.9.0 changes=[{"at":"3.19.0","status":"unaffected"}]

Published CVSS scores

6.9GitHubCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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