CVE-2026-50559

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.7%, top 50% 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, secondary
Elevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 7.5Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

Quarkus is a Java framework for building cloud-native applications. Prior to versions 3.37.0, 3.36.3, 3.33.2.1, 3.33.3, 3.27.4.1, 3.27.5, and 3.20.6.2, Quarkus HTTP path-based authorization policies can be bypassed using encoded semicolons (%3B) to smuggle matrix parameters past the security layer, and using encoded slashes (%2F) or backslashes (%5C) to access protected static resources. This is a distinct issue from CVE-2026-39852, which addressed only literal semicolon stripping. Versions 3.37.0, 3.36.3, 3.33.2.1, 3.33.3, 3.27.4.1, 3.27.5, and 3.20.6.2 contain a patch.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
65
EG Risk 65/100

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
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
EPSS PROB
0.7%
EPSS %ILE
50th
KEV
Not listed

Published

June 19, 2026

Last Modified

August 13, 2026

Advisory Details (1)

Auto-updated Jun 19, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Authentication/Authorization Bypass via Advanced Path Normalization Vulnerabilities · Advisory · quarkusio/quarkus · GitHub

https://github.com/quarkusio/quarkus/security/advisories/GHSA-qcxp-gm7m-4j5v

Vendor Advisories for CVE-2026-50559(9)

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

Patch Availability(3)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatquarkus-vertx-http2026-08-12redhat
redhatcryostat/jfr-datasource-rhel9:4.2.0-132026-07-29redhat
redhatdevspaces/multicluster-redirector-rhel9:17829890272026-07-08redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
Maven(1)
PackageVulnerable rangeFix by version rangeDependents
io.quarkus:quarkus-vertx-http3.37.0.CR1
  • every version up to 3.20.6.2: fixed in 3.20.6.2
  • 3.21.0.CR1 up to 3.27.4.1: fixed in 3.27.4.1
  • 3.28.0.CR1 up to 3.33.2.1: fixed in 3.33.2.1
  • 3.34.0.CR1 up to 3.36.3: fixed in 3.36.3
  • 3.37.0.CR1 up to 3.37.0: fixed in 3.37.0
—

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 6× 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.

Showing the most recent 100 of 254 total refreshes for this CVE.

  1. 2026-10-04 23:22 UTCEPSS rescore
  2. 2026-10-03 14:26 UTCEPSS rescore
  3. 2026-10-02 17:56 UTCEPSS rescore
  4. 2026-10-01 19:50 UTCEPSS rescore
  5. 2026-09-30 15:03 UTCEPSS rescore
  6. 2026-09-28 13:51 UTCEPSS rescore
  7. 2026-09-27 13:48 UTCEPSS rescore
  8. 2026-09-26 15:59 UTCEPSS rescore
  9. 2026-09-26 00:27 UTCEPSS rescore
  10. 2026-09-23 17:53 UTCEPSS rescore
  11. 2026-09-20 20:16 UTCEPSS rescore
  12. 2026-09-18 19:28 UTCEPSS rescore
  13. 2026-09-16 14:08 UTCEPSS rescore
  14. 2026-09-16 05:15 UTCEPSS rescore
  15. 2026-09-14 02:13 UTCEG score recompute
  16. 2026-09-14 02:13 UTCVendor advisory
  17. 2026-09-13 16:47 UTCEPSS rescore
  18. 2026-09-13 13:01 UTCEG score recompute
  19. 2026-09-13 13:01 UTCVendor advisory
  20. 2026-09-11 14:53 UTCEPSS rescore
  21. 2026-09-10 09:35 UTCEPSS rescore
  22. 2026-09-08 22:01 UTCEPSS rescore
  23. 2026-09-07 16:01 UTCEPSS rescore
  24. 2026-09-06 13:47 UTCEPSS rescore
  25. 2026-09-04 05:06 UTCEPSS rescore
Show 75 more
  1. 2026-09-02 14:12 UTCEPSS rescore
  2. 2026-09-01 13:54 UTCEPSS rescore
  3. 2026-09-01 04:40 UTCEPSS rescore
  4. 2026-08-30 20:45 UTCEG score recompute
  5. 2026-08-30 20:45 UTCVendor advisory
  6. 2026-08-30 19:17 UTCEPSS rescore
  7. 2026-08-30 01:22 UTCEPSS rescore
  8. 2026-08-28 21:41 UTCEPSS rescore
  9. 2026-08-27 14:25 UTCEPSS rescore
  10. 2026-08-26 14:46 UTCEPSS rescore
  11. 2026-08-25 13:49 UTCEPSS rescore
  12. 2026-08-25 01:12 UTCEG score recompute
  13. 2026-08-25 01:12 UTCVendor advisory
  14. 2026-08-24 13:59 UTCEG score recompute
  15. 2026-08-24 13:59 UTCVendor advisory
  16. 2026-08-23 21:56 UTCVendor advisory
  17. 2026-08-23 10:42 UTCEG score recompute
  18. 2026-08-23 10:42 UTCVendor advisory
  19. 2026-08-23 00:19 UTCEPSS rescore
  20. 2026-08-22 23:30 UTCEG score recompute
  21. 2026-08-22 23:30 UTCVendor advisory
  22. 2026-08-21 23:49 UTCEPSS rescore
  23. 2026-08-21 17:41 UTCVendor advisory
  24. 2026-08-21 06:27 UTCEG score recompute
  25. 2026-08-21 06:27 UTCVendor advisory
  26. 2026-08-20 22:55 UTCEPSS rescore
  27. 2026-08-20 19:12 UTCVendor advisory
  28. 2026-08-20 07:59 UTCEG score recompute
  29. 2026-08-20 07:59 UTCVendor advisory
  30. 2026-08-19 17:04 UTCEPSS rescore
  31. 2026-08-19 05:50 UTCEG score recompute
  32. 2026-08-19 05:50 UTCVendor advisory
  33. 2026-08-18 13:48 UTCEPSS rescore
  34. 2026-08-17 13:47 UTCEPSS rescore
  35. 2026-08-17 07:36 UTCVendor advisory
  36. 2026-08-16 20:24 UTCEG score recompute
  37. 2026-08-16 20:24 UTCVendor advisory
  38. 2026-08-16 14:56 UTCEPSS rescore
  39. 2026-08-16 08:59 UTCEG score recompute
  40. 2026-08-16 08:59 UTCVendor advisory
  41. 2026-08-16 02:14 UTCEPSS rescore
  42. 2026-08-15 21:47 UTCVendor advisory
  43. 2026-08-15 10:27 UTCEG score recompute
  44. 2026-08-15 10:27 UTCVendor advisory
  45. 2026-08-15 01:30 UTCEPSS rescore
  46. 2026-08-14 23:14 UTCVendor advisory
  47. 2026-08-14 12:01 UTCVendor advisory
  48. 2026-08-14 00:49 UTCEG score recompute
  49. 2026-08-14 00:49 UTCVendor advisory
  50. 2026-08-13 22:00 UTCEPSS rescore
  51. 2026-08-13 13:36 UTCEG score recompute
  52. 2026-08-13 13:36 UTCVendor advisory
  53. 2026-08-13 12:27 UTCEG score recompute
  54. 2026-08-13 12:27 UTCVendor advisory
  55. 2026-08-13 05:26 UTCVendor advisory
  56. 2026-08-12 18:06 UTCEG score recompute
  57. 2026-08-12 18:06 UTCVendor advisory
  58. 2026-08-12 13:51 UTCEPSS rescore
  59. 2026-08-12 06:52 UTCVendor advisory
  60. 2026-08-11 19:39 UTCEG score recompute
  61. 2026-08-11 19:39 UTCVendor advisory
  62. 2026-08-11 08:19 UTCEG score recompute
  63. 2026-08-11 08:19 UTCVendor advisory
  64. 2026-08-11 00:00 UTCEPSS rescore
  65. 2026-08-10 21:05 UTCVendor advisory
  66. 2026-08-10 09:52 UTCVendor advisory
  67. 2026-08-09 22:39 UTCEG score recompute
  68. 2026-08-09 22:39 UTCVendor advisory
  69. 2026-08-09 13:46 UTCEPSS rescore
  70. 2026-08-09 11:27 UTCVendor advisory
  71. 2026-08-09 00:14 UTCEG score recompute
  72. 2026-08-09 00:14 UTCVendor advisory
  73. 2026-08-08 16:37 UTCEPSS rescore
  74. 2026-08-08 13:01 UTCVendor advisory
  75. 2026-08-08 01:48 UTCEG score recompute

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Frequently asked(5)

What is CVE-2026-50559?
CVE-2026-50559 is a high vulnerability published on June 19, 2026. Quarkus is a Java framework for building cloud-native applications. Prior to versions 3.37.0, 3.36.3, 3.33.2.1, 3.33.3, 3.27.4.1, 3.27.5, and 3.20.6.2, Quarkus HTTP path-based authorization policies can be bypassed using encoded semicolons (%3B) to smuggle matrix parameters past the security layer,…
When was CVE-2026-50559 disclosed?
CVE-2026-50559 was first published on June 19, 2026, with the most recent update on August 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-50559 actively exploited?
CVE-2026-50559 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (50th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-50559?
CVE-2026-50559 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-50559?
A fix for CVE-2026-50559 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-50559 are linked in the Vendor Advisories panel on this page.

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