CVE-2024-9266Public exploitNetwork attack vector

User redirection via resolved triple-slash Location header

Published Oct 3, 2024 · Updated Oct 3, 2024

Open redirect in the Response object in Express 3.4.5 through 3.x allows remote attackers to redirect users via crafted request paths. The location() method extracts a leading // from the request path and resolves it against a user-controlled ./ relative URL, producing a triple-slash Location value that browsers treat as a scheme-relative external URL. The application must pass that input to location(), and a user must follow the crafted link; successful exploitation redirects the browser to an attacker-controlled site.

CVSS severity4.7
Medium
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Open redirect in the Response object in Express 3.4.5 through 3.x allows remote attackers to redirect users via crafted request paths. The location() method extracts a leading // from the request path and resolves it against a user-controlled ./ relative URL, producing a triple-slash Location value that browsers treat as a scheme-relative external URL. The application must pass that input to location(), and a user must follow the crafted link; successful exploitation redirects the browser to an attacker-controlled site.

The record

CVE
CVE-2024-9266
Published
Oct 3, 2024
Updated
Oct 3, 2024
Vendor
body-parser
Product
Express
Classifications
CWE-601, T1566.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 3, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=3.4.5 <4.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

body-parser · Expressversion=3.4.5 <4.0.0

Published CVSS scores

4.7HeroDevsCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N
2.1GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N/E:P

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-601URL Redirection to Untrusted Site ('Open Redirect')
T1566.002Phishing: Spearphishing Link

Public exploit references

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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