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CVE-2026-50559

HIGH 7.5

Published 2026-06-19 · Last modified 2026-07-21

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.

ELEVATED IMPACT

Severe if exploited (CVSS 7.5), but no known exploitation and low modeled probability. Patch on a normal cadence.

Exploitation likelihood

0.5%chance of exploitation in 30 days · 37th percentile

○ In CISA KEV ○ Public exploit / PoC

Impact if exploited

7.5CVSS 3.1 · HIGH

  • ConfidentialityHigh
  • IntegrityNone
  • AvailabilityNone

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ✓Privileges: No account or privileges required
  • ✓User interaction: No user interaction needed
  • ✓Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept & exploit code

Test against your own equipment

curl -s https://vulnpedia.com/cve/CVE-2026-50559/poc.jsonMachine-readable PoC index for this CVE (for automation).

Listed for defensive triage, patch verification, and authorized testing on systems you own. Machine-readable: /cve/CVE-2026-50559/poc.json

Affected

Vendors Quarkusio Red Hat Quarkus

Products Quarkus Red Hat Build Of Apache Camel 3.33 For Quarkus 3.33.2.Sp1 Red Hat Build Of Quarkus 3.20.6.Sp2 Red Hat Build Of Quarkus 3.27.4.Sp1 Red Hat Build Of Quarkus 3.33.2.Sp1 Streams For Apache Kafka 2.9.4 Red Hat Openshift Dev Spaces 3.29 Cryostat 4 Openshift Serverless Red Hat Build Of Apache Camel 4 For Quarkus 3 Red Hat Build Of Apache Camel Hawtio 4 Red Hat Build Of Apicurio Registry 3

Weakness (CWE)

  • CWE-287: : Improper Authentication
  • CWE-863: : Incorrect Authorization
  • CWE-551: Incorrect Behavior Order: Authorization Before Parsing and Canonicalization

CVSS vector

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

Known Affected Software Configurations

VendorProductVersion range
QuarkusQuarkus< 3.20.6.2
QuarkusQuarkus≥ 3.21.0 and < 3.27.4.1
QuarkusQuarkus≥ 3.28.0 and < 3.33.2.1
QuarkusQuarkus≥ 3.34.0 and < 3.36.3

All CVSS metrics

  • HIGH 7.5 v3.1 · CNA Primary
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
  • HIGH 7.5 v3.1 · ADP Primary
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
  • HIGH 7.5 v3.1 · NVD Secondary
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

Exploits & PoC

Advisories

Technical & other

Sources: NVD · CVE.org · EPSS