LiveActive security incident?Get immediate response
CVE Record

CVE-2026-50559: Authentication/Authorization Bypass via Advanced Path Normalization Vulnerabilities

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.

HighCVSS 7.5Not KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

Quarkus applications using HTTP path-based authorization may let unauthenticated users reach content that should be protected. The issue comes from inconsistent path normalization before authorization checks. The stated impact is confidentiality loss, not integrity or availability. Patched Quarkus releases are available.

Executive priority

Treat as high priority for externally reachable Quarkus services or systems exposing sensitive data. Prioritize patching over compensating controls because the flaw is in authorization path handling.

Technical view

Before the listed fixed releases, Quarkus authorization checks could be bypassed with specially encoded path characters that affected matrix-parameter handling and protected static resource access. The issue is separate from CVE-2026-39852, which covered only literal semicolon stripping. CVSS 3.1 is 7.5, network reachable, low complexity, no privileges, no user interaction.

Likely exposure

Most relevant to Java services built on affected Quarkus 3.x versions that rely on HTTP path-based authorization policies or serve protected static resources. Internet-facing services increase business urgency.

Exploitation context

The bundle does not show CISA KEV listing or confirmed active exploitation. The vulnerability is still practical to prioritize because it is network reachable, unauthenticated, low complexity, and affects access control.

Researcher notes

Focus review on normalization consistency between routing, security policy evaluation, and static resource serving. Evidence provided identifies affected version ranges and fixed versions, but does not include exploit telemetry or broader affected product claims beyond Quarkus and listed Red Hat advisories.

Mitigation direction

  • Upgrade Quarkus to one of the fixed versions listed in the advisory.
  • Apply relevant Red Hat errata where Quarkus is consumed through Red Hat products.
  • Review vendor guidance for product-specific packaging, backports, and support status.
  • Reassess path-based authorization rules protecting sensitive endpoints and static resources.

Validation and detection

  • Inventory Quarkus versions across applications and build manifests.
  • Flag versions in the affected ranges listed by the CVE source bundle.
  • Confirm production deployments run a fixed or vendor-backported build.
  • Review whether protected resources rely on path-only authorization decisions.
  • Test authorization behavior in a controlled environment without publishing bypass details.
Prepared
Confidence
high
Sources
12

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · medium confidence lookup

CWE-287: Credential and account abuse lookup

Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

Open ATT&CK lookup
cwe · low confidence lookup

CWE-551: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

Open ATT&CK lookup
cwe · medium confidence lookup

CWE-863: Authorization and privilege behavior lookup

Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

Open ATT&CK lookup
description · low confidence lookup

Privilege behavior lookup

The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2026-50559 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
High
CVSS
7.5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

2CVSS vectors
5Timeline events
2ADP providers
11Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: pocAutomatable: yesTechnical Impact: partial

CVSS vector scores

2 official scores

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.5CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N3.93.6GitHub_M
7.5CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N3.93.6redhat-SADP

Vulnerability scoring details

Base CVSS 3.1 score

7.5High
CVSS 3.1 vector shape for CVE-2026-50559Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. ADP timelineredhat-SADP

    Reported to Red Hat.

  3. ADP timelineredhat-SADP

    Made public.

  4. CVE publishedCVE Program

    The CVE record was published.

  5. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc
redhat-SADPio.quarkus/quarkus-vertx-http: Quarkus: Authorization bypass in HTTP path-based policies via encoded characters
other:Red Hat severity ratingcvssV3_1
  • 2026-06-09T10:55:32.426Z: Reported to Red Hat.
  • 2026-06-17T00:00:00.000Z: Made public.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
quarkusioquarkus>= 3.36.0, < 3.36.3, >= 3.33.0, < 3.33.2.1, >= 3.27.0, < 3.27.4.1, < 3.20.6.2Listed
Weakness

CWE details

CWE-287CWE-551CWE-863

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.