CVE-2026-55590

MEDIUMNVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.1 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 80% 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
6.1
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.1Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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
6.1(medium)
EG Risk
32(Track)
EG Risk 32/100SSVC: Track

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%
Action: Routine — remediate on your standard cadence.
EPSS
20.1%
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.
github Patch Available

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 rangeFixed inDependents
cakephp/authentication4.0.0, 4.0.1, 4.1.04.1.1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 24× 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.

  1. 2026-07-23 14:18 UTCEPSS rescore
  2. 2026-07-23 03:20 UTCEG score recompute
  3. 2026-07-22 14:08 UTCEPSS rescore
  4. 2026-07-21 15:25 UTCEPSS rescore
  5. 2026-07-20 17:08 UTCEPSS rescore
  6. 2026-07-19 14:31 UTCEPSS rescore
  7. 2026-07-19 14:31 UTCEPSS rescore
  8. 2026-07-19 02:29 UTCEPSS rescore
  9. 2026-07-18 10:04 UTCEPSS rescore
  10. 2026-07-16 17:03 UTCEPSS rescore
  11. 2026-07-15 16:57 UTCEPSS rescore
  12. 2026-07-15 16:57 UTCEPSS rescore
  13. 2026-07-15 02:00 UTCEPSS rescore
  14. 2026-07-15 02:00 UTCEPSS rescore
  15. 2026-07-13 23:07 UTCEG score recompute▲ 1.00
  16. 2026-07-13 22:31 UTCEPSS rescore
  17. 2026-07-13 18:08 UTCNVD updateCVSS v3 → 6.1
  18. 2026-07-13 06:13 UTCEPSS rescore
  19. 2026-07-13 06:13 UTCEPSS rescore
  20. 2026-07-12 05:46 UTCEPSS rescore
  21. 2026-07-11 08:27 UTCEPSS rescore
  22. 2026-07-11 08:27 UTCEPSS rescore
  23. 2026-07-09 19:14 UTCEG score recompute▲ 5.10
  24. 2026-07-09 19:12 UTCMITRE cvelistV5CVSS v3 → 5.1 · CVSS v4 → 5.1
  25. 2026-06-17 19:06 UTCEG score recompute

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 in the National Vulnerability Database 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 20.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55590, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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