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 60% 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%CVSS: 6.1Exploit: None knownExposed: 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 PROB
0%
EPSS %ILE
40%
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 10× in last 7d / 47× 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. 2026-08-25 13:49 UTCEPSS rescore
  2. 2026-08-25 06:16 UTCEG score recompute
  3. 2026-08-23 03:59 UTCEG score recompute
  4. 2026-08-23 00:19 UTCEPSS rescore
  5. 2026-08-21 23:49 UTCEPSS rescore
  6. 2026-08-21 10:04 UTCEG score recompute
  7. 2026-08-20 22:55 UTCEPSS rescore
  8. 2026-08-20 09:06 UTCEG score recompute
  9. 2026-08-19 17:04 UTCEPSS rescore
  10. 2026-08-19 08:08 UTCEG score recompute
  11. 2026-08-18 13:48 UTCEPSS rescore
  12. 2026-08-17 13:47 UTCEPSS rescore
  13. 2026-08-17 04:44 UTCEG score recompute
  14. 2026-08-16 14:56 UTCEPSS rescore
  15. 2026-08-16 03:46 UTCEG score recompute
  16. 2026-08-16 02:14 UTCEPSS rescore
  17. 2026-08-15 02:49 UTCEG score recompute
  18. 2026-08-15 01:30 UTCEPSS rescore
  19. 2026-08-14 01:51 UTCEG score recompute
  20. 2026-08-13 22:00 UTCEPSS rescore
  21. 2026-08-13 00:53 UTCEG score recompute
  22. 2026-08-12 13:51 UTCEPSS rescore
  23. 2026-08-11 23:56 UTCEG score recompute
  24. 2026-08-11 00:00 UTCEPSS rescore
  25. 2026-08-09 22:01 UTCEG score recompute
Show 51 more
  1. 2026-08-09 13:46 UTCEPSS rescore
  2. 2026-08-08 21:04 UTCEG score recompute
  3. 2026-08-08 16:37 UTCEPSS rescore
  4. 2026-08-07 20:06 UTCEG score recompute
  5. 2026-08-06 19:09 UTCEG score recompute
  6. 2026-08-06 13:47 UTCEPSS rescore
  7. 2026-08-05 19:17 UTCEPSS rescore
  8. 2026-08-04 15:25 UTCEG score recompute
  9. 2026-08-04 15:10 UTCEPSS rescore
  10. 2026-08-04 10:39 UTCEPSS rescore
  11. 2026-08-03 10:36 UTCEPSS rescore
  12. 2026-08-02 06:30 UTCEG score recompute
  13. 2026-08-02 02:27 UTCEPSS rescore
  14. 2026-08-01 05:17 UTCEG score recompute
  15. 2026-08-01 04:16 UTCEPSS rescore
  16. 2026-07-31 04:17 UTCEG score recompute
  17. 2026-07-30 16:28 UTCEPSS rescore
  18. 2026-07-30 03:18 UTCEG score recompute
  19. 2026-07-30 01:30 UTCEPSS rescore
  20. 2026-07-29 02:11 UTCEG score recompute
  21. 2026-07-28 15:37 UTCEPSS rescore
  22. 2026-07-28 01:11 UTCEG score recompute
  23. 2026-07-26 19:01 UTCEG score recompute
  24. 2026-07-26 14:54 UTCEPSS rescore
  25. 2026-07-25 14:18 UTCEPSS rescore
  26. 2026-07-24 14:18 UTCEPSS rescore
  27. 2026-07-23 14:18 UTCEPSS rescore
  28. 2026-07-23 03:20 UTCEG score recompute
  29. 2026-07-22 14:08 UTCEPSS rescore
  30. 2026-07-21 15:25 UTCEPSS rescore
  31. 2026-07-20 17:08 UTCEPSS rescore
  32. 2026-07-19 14:31 UTCEPSS rescore
  33. 2026-07-19 14:31 UTCEPSS rescore
  34. 2026-07-19 02:29 UTCEPSS rescore
  35. 2026-07-18 10:04 UTCEPSS rescore
  36. 2026-07-16 17:03 UTCEPSS rescore
  37. 2026-07-15 16:57 UTCEPSS rescore
  38. 2026-07-15 16:57 UTCEPSS rescore
  39. 2026-07-15 02:00 UTCEPSS rescore
  40. 2026-07-15 02:00 UTCEPSS rescore
  41. 2026-07-13 23:07 UTCEG score recompute▲ 1.00
  42. 2026-07-13 22:31 UTCEPSS rescore
  43. 2026-07-13 18:08 UTCNVD updateCVSS v3 → 6.1
  44. 2026-07-13 06:13 UTCEPSS rescore
  45. 2026-07-13 06:13 UTCEPSS rescore
  46. 2026-07-12 05:46 UTCEPSS rescore
  47. 2026-07-11 08:27 UTCEPSS rescore
  48. 2026-07-11 08:27 UTCEPSS rescore
  49. 2026-07-09 19:14 UTCEG score recompute▲ 5.10
  50. 2026-07-09 19:12 UTCMITRE cvelistV5CVSS v3 → 5.1 · CVSS v4 → 5.1
  51. 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 0% probability of exploitation in the next 30 days, which ranks it in the top 60.0% of all 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?
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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