CVE-2026-55590Network attack vector

Open redirect via unnormalized backslash-prefixed target

Published Jul 9, 2026 · Updated Jul 9, 2026

Open redirect in CakePHP Authentication allows remote attackers to send users to attacker-controlled sites through a crafted login URL. getLoginRedirect() passes redirect query values beginning with backslashes after parse_url() fails to identify a host, while browsers normalize those backslashes into slashes in the Location header. Exploitation requires a user to follow a crafted link; the redirect changes browser navigation but does not directly expose application data.

CVSS severity5.1
Medium
EPSS probability0.49%
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 CakePHP Authentication allows remote attackers to send users to attacker-controlled sites through a crafted login URL. getLoginRedirect() passes redirect query values beginning with backslashes after parse_url() fails to identify a host, while browsers normalize those backslashes into slashes in the Location header. Exploitation requires a user to follow a crafted link; the redirect changes browser navigation but does not directly expose application data.

The record

CVE
CVE-2026-55590
Published
Jul 9, 2026
Updated
Jul 9, 2026
Vendor
CakePHP
Product
CakePHP Authentication
Classifications
CWE-601, T1566.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record 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=< 2.11.1
  2. Affected versionversion=>= 3.0.0, < 3.3.6
  3. Affected versionversion=>= 4.0.0, < 4.1.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

CakePHP · CakePHP Authenticationversion=< 2.11.1; version=>= 3.0.0, < 3.3.6; version=>= 4.0.0, < 4.1.1

Published CVSS scores

5.1GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

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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