CVE-2026-55590

MEDIUMNVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.1 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 59% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 6.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

CakePHP Authentication is an authentication plugin for CakePHP that can also be used in PSR-7 based applications. Prior to 2.11.1, 3.3.6, and 4.1.1, the getLoginRedirect() method contains a weakness to backslash bypasses that allows redirect targets with attacker-controlled hostnames through the redirect query string parameter. This issue is fixed in versions 2.11.1, 3.3.6, and 4.1.1.

CVSS v3
6.1
EG Score
6.1MEDIUMmedium confidence
EG Risk
32
EG Risk 32/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity61% × 45%
Exploitation0% × 40%
Automatability30% × 15%
EPSS PROB
0.5%
EPSS %ILE
40th
KEV
Not listed

Published

June 17, 2026

Last Modified

July 13, 2026

Advisory Details (10)

Auto-updated Jul 9, 2026
Patch available. Sources: github_release, github, github_commit, github_pr.
githubMentions a patch (unverified)

Open redirect weakness via backslash bypass · Advisory · cakephp/authentication · GitHub

https://github.com/cakephp/authentication/security/advisories/GHSA-hhpq-7wg4-36jm
github_release Patch Available

Authentication 4.1.1

Patch available: cakephp/authentication 4.1.1

https://github.com/cakephp/authentication/releases/tag/4.1.1
github_release Patch Available

Authentication 3.3.6

Patch available: cakephp/authentication 3.3.6

https://github.com/cakephp/authentication/releases/tag/3.3.6
github_release Patch Available

Authentication 2.11.1

Patch available: cakephp/authentication 2.11.1

https://github.com/cakephp/authentication/releases/tag/2.11.1
github_pr Patch Available

Backport security patches from 3.x and 4.x

Patch available: cakephp/authentication 2.11.1 (PR #799 merged 2026-06-25)

https://github.com/cakephp/authentication/pull/799
github_pr Patch Available

Fix an open redirect weakness in getLoginRedirect()

Patch available: cakephp/authentication 3.3.6 (PR #796 merged 2026-06-14)

https://github.com/cakephp/authentication/pull/796
github_pr Patch Available

Fix an open redirect weakness in getLoginRedirect()

Patch available: cakephp/authentication 4.1.1 (PR #795 merged 2026-06-13)

https://github.com/cakephp/authentication/pull/795
github_commit Patch Available

commit ee24bd48b9c3 (cakephp/authentication)

Patch available: cakephp/authentication 4.1.1 (contains commit ee24bd48b9c3)

https://github.com/cakephp/authentication/commit/ee24bd48b9c3ef693dc9965de8f0cc8020a7052c
github_commit Patch Available

commit df28ea4e712f (cakephp/authentication)

Patch available: cakephp/authentication 3.3.6 (contains commit df28ea4e712f)

https://github.com/cakephp/authentication/commit/df28ea4e712f1e5bd0e42be4a3c5c750ca50764d
github_commit Patch Available

commit 1c1e29c7e812 (cakephp/authentication)

Patch available: cakephp/authentication 2.11.1 (contains commit 1c1e29c7e812)

https://github.com/cakephp/authentication/commit/1c1e29c7e8129cfbcae74558316ecd3ea50a8273

Vendor Advisories for CVE-2026-55590(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFix by version rangeDependents
cakephp/authentication1.0.0 ... 2.9.0 (50 versions)
  • 3.0.0 up to 3.3.6: fixed in 3.3.6
  • 4.0.0 up to 4.1.1: fixed in 4.1.1
  • every version up to 2.11.1: fixed in 2.11.1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 27× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 116 total refreshes for this CVE.

  1. 2026-10-09 20:07 UTCEPSS rescore
  2. 2026-10-08 17:12 UTCEPSS rescore
  3. 2026-10-07 23:48 UTCEPSS rescore
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  9. 2026-10-02 16:40 UTCOSV refresh
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  24. 2026-09-13 16:47 UTCEPSS rescore
  25. 2026-09-13 14:08 UTCEG score recompute
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  1. 2026-09-11 14:53 UTCEPSS rescore
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  26. 2026-08-18 13:48 UTCEPSS rescore
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  40. 2026-08-09 22:01 UTCEG score recompute
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  44. 2026-08-07 20:06 UTCEG score recompute
  45. 2026-08-06 19:09 UTCEG score recompute
  46. 2026-08-06 13:47 UTCEPSS rescore
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  49. 2026-08-04 15:10 UTCEPSS rescore
  50. 2026-08-04 10:39 UTCEPSS rescore
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  57. 2026-07-30 16:28 UTCEPSS rescore
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  63. 2026-07-26 19:01 UTCEG score recompute
  64. 2026-07-26 14:54 UTCEPSS rescore
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  74. 2026-07-19 02:29 UTCEPSS rescore
  75. 2026-07-18 10:04 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-55590?
CVE-2026-55590 is a medium vulnerability published on June 17, 2026. CakePHP Authentication is an authentication plugin for CakePHP that can also be used in PSR-7 based applications. Prior to 2.11.1, 3.3.6, and 4.1.1, the getLoginRedirect() method contains a weakness to backslash bypasses that allows redirect targets with attacker-controlled hostnames through the…
When was CVE-2026-55590 disclosed?
CVE-2026-55590 was first published on June 17, 2026, with the most recent update on July 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55590 actively exploited?
CVE-2026-55590 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (40th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-55590?
CVE-2026-55590 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2026-55590?
A fix for CVE-2026-55590 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-55590 are linked in the Vendor Advisories panel on this page.

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